All Wiring Diagrams for GMC Sierra HD 2008 2500 – Arabalar için bağlantı şemaları

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 3) for GMC Sierra HD 2008 2500

List of elements for Automatic A/C Wiring Diagram (1 of 3) for GMC Sierra HD 2008 2500:

(except 6.6l: in engine harness, 23 cm from map sensor breakout)
(in i/p harness, 13 cm from radio connector breakout) j203
(left side of headliner) front inside air temperature sensor
(lower left side of dash) left i/p junction block
(lower right side of hvac module) blower motor
(lower right side of hvac module) blower motor control module
(on right front corner of hvac module) g200
(under upper left side of dash) upper left air temperature sensor
(under upper right side of dash) upper right air temperature sensor
5v ref
A/c ind
A/c low pressure switch (on right side of a/c accumulator)
A/c on
Air temp
Air tmp
Air tmp sig
Amb air tmp
Ambient air temperature sensor (on left side of radiator support)
Ambient light/ sunload sensor assembly (top center of dash)
Auto
B(+)
Batt pos volt
Blwr spd
Colnt lvl
Computer data lines system
Defogger system
Dfrst val
Engine coolant level switch (6.6l) (on bottom of surge tank)
Fan dn
Fan up
Fresh air
Frnt dfg
Frt def
Fsh air
G103 (except 4.3l) (on front of right cylinder head)
G106 (4.3l) (right rear of engine)
G200 (on right front corner of hvac module)
G201 (upper left corner of dash)
Gmlan l
Ground
Hvac control module
Ign 3
J106
J206 (in i/p harness, 14.5 cm from x200 breakout)
J328 (in headliner harness, 5 cm from front inside air temperature sensor breakout)
L air tmp
Left sunload sensor
Left temp control
Lf sunld
Logic
Low ref
Lw prss
Mode ctrl
Mode dn
Mode up
Mtr spd ctrl
Off
Power distribution system
R air tmp
Rear defog
Rear dfg
Recir
Recir ctrl
Recirc
Recirc pos
Red
Rer def
Rf sunld
Right sunload sensor
Right temp control
Tan

Automatic A/C Wiring Diagram (2 of 3) for GMC Sierra HD 2008 2500

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List of elements for Automatic A/C Wiring Diagram (2 of 3) for GMC Sierra HD 2008 2500:

(left front of engine compt, near fan shroud) engine control module (ecm)
(lower left side of dash) body control module (bcm)
(on front of a/c compressor) a/c compressor clutch
(top left rear of engine) (4.3l) g107
4a1
4a2
4a3
4a4
4a5
4a6
4b2
4b3
4b5
4b6
6.6l except 6.6l & 4.3l 4.3l
A/c cmprsr fuse 17 (except 6.6l) fuse 18 (6.6l) 10a
A/c comp- ressor clutch relay
A4 x5
E x4
Engine coolant temperature (ect) sensor (4.3l: left side of dash) (except 4.3l & 6.6l: on top of engine) (6.6l: top front center of engine)
Except 6.6l & 6.0l (vin k)
G102 (except 4.3l & 6.6l) (on lower left front of engine)
Hot at all times
Hvac batt fuse 39 10a
Hvac blwr fuse 70 40a
Hvac ign fuse 57 (except 6.6l) fuse 55 (6.6l) 10a
J105
Pnk
Red
Right i/p junction block (in right end of dash)
Run/ crank relay
Tan
Under- hood fuse block (left side of engine compt)

Automatic A/C Wiring Diagram (3 of 3) for GMC Sierra HD 2008 2500

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List of elements for Automatic A/C Wiring Diagram (3 of 3) for GMC Sierra HD 2008 2500:

(left side of hvac module) lower left air temperature sensor
(lower left of hvac module) lower right air temperature sensor
(near compressor, on a/c high pressure hose) a/c refrigerant pressure sensor
(on lower right radiator support) g101
87a
Cooling fan diode 1
Cooling fan diode 2
Except 6.6l & 6.0l (vin k)
Fan cntrl relay
Fan hi relay 1
Fan lo relay
Fan-1 fuse 60 40a
Fan-2 fuse 62 40a
G100 (on lower left radiator support)
Hot at all times
J100
J101
Left air temperature actuator (bottom left of hvac module)
Left engine cooling fan (left front of engine compt)
Logic
Mode actuator (left end of hvac module)
Pwr/ trn relay
Recirculation actuator (top right side of hvac module)
Right air temperature actuator (top middle of hvac module)
Right engine cooling fan (right front of engine compt)
Tan
Under- hood fuse block (left side of engine compt)

Compressor Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Compressor Wiring Diagram for GMC Sierra HD 2008 2500:

(4.3l: top left rear of engine) (6.6l: on front of right cylinder head) (except 4.3l & 6.6l: on lower left front of engine)
(on front of a/c compressor) a/c compressor clutch
4.3l
6.6l
A/c cmprsr fuse 17 (except 6.6l) fuse 16 (6.6l) 10a
A/c cmprsr relay
A/c ind
A/c low pressure switch (on right side of a/c accumulator)
A/c on
A/c refrigerant pressure sensor (near compressor, on a/c high pressure hose)
Automatic a/c
B(+)
Computer data lines system
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l & 6.6l
G103 (except 4.3l) (on front of right cylinder head)
G106 (4.3l) (right rear of engine)
G107 (4.3l) g103 (6.6l) g102 (except 4.3l & 6.6l)
G200 (on right front corner of hvac module)
Gmlan l
Ground
Hot at all times
Hvac batt fuse 39 (except 6.6l) fuse 36 (6.6l) 10a
Hvac control module
J105
J106
J203
Logic
Lw prss
Manual a/c
Tan
Under- hood fuse block (left side of engine compt)

Manual A/C Wiring Diagram (1 of 3) for GMC Sierra HD 2008 2500

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List of elements for Manual A/C Wiring Diagram (1 of 3) for GMC Sierra HD 2008 2500:

(4.3l) g107
(4.3l: top left rear of engine) (6.6l: on front of right cylinder head) (except 6.6l & 4.3l: on lower left front of engine)
(6.6l) g103
(except 6.6l: in engine harness, 23 cm from map sensor breakout)
(left front of engine compt, near fan shroud) engine control module (ecm)
(lower right side of hvac module) blower motor
(lower right side of hvac module) blower motor control module
4.3l
5v ref
6.6l
A/c cmprsr fuse 17 (except 6.6l) fuse 18 (6.6l) 10a
A/c comp- ressor clutch relay
A/c ind
A/c low pressure switch (on right side of a/c accumulator)
A/c on
B(+)
Batt pos volt
Blower motor control switch
Blwr spd
Colnt lvl
Computer data lines system
Defogger system
Dfrst val
Engine coolant level switch (6.6l) (on bottom of surge tank)
Engine coolant temperature (ect) sensor (4.3l: left side of dash) (except 4.3l & 6.6l: on top of engine) (6.6l: top front center of engine)
Except 4.3l & 6.6l
Except 6.6l 6.0l (vin k)
Fresh air
Frh air
G102 (except 6.6l & 4.3l)
G103 (except 6.6l) (on front of right cylinder head)
G106 (4.3l) (right rear of engine)
G200 (on right front corner of hvac module)
G201 (upper left corner of dash)
Gmlan l
Ground
Hot at all times
Hvac batt fuse 39 (except 6.6l) fuse 36 (6.6l) 10a
Hvac blwr fuse 70 (except 6.6l) fuse 65 (6.6l) 40a
Hvac control module
Hvac ign fuse 55 (except 6.6l) fuse 52 (6.6l) 10a
Ign 3
Interior lights system power distribution system
J105
J106
J203
Led cntl
Left i/p junction block (lower left side of dash)
Logic
Low ref
Lw prss
Mode ctrl
Mode switch
Mtr spd ctrl
Pnk
R air tmp
Rear defog
Rear dfg
Recir
Recir ctrl
Recirc
Red
Rer def
Run/ crank relay
Tan
Temperature control switch
Under- hood fuse block (left side of engine compt)

Manual A/C Wiring Diagram (2 of 3) for GMC Sierra HD 2008 2500

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List of elements for Manual A/C Wiring Diagram (2 of 3) for GMC Sierra HD 2008 2500:

(4.3l) g107
(4.3l: top left rear of engine) (6.6l: on front of right cylinder head) (except 6.6l & 4.3l: on lower left front of engine)
(6.6l) g103
(lower left side of dash) body control module (bcm)
(near compressor, on a/c high pressure hose) a/c refrigerant pressure sensor
(on front of a/c compressor) a/c compressor clutch
4a1
4a4
4a6
4b3
4b5
87a
Cooling fan diode 1
Cooling fan diode 2
Except 6.6l & 6.0l (vin k)
Fan cntrl relay
Fan lo relay
Fan-1 fuse 60 40a
Fan-2 fuse 62 40a
G100 (on lower left rediator support)
G101 (on lower right radiator support)
G102 (except 6.6l & 4.3l)
Hi fan relay
Hot at all times
J100
J101
J105
Left engine cooling fan (left front of engine compt)
Pnk
Pwr/ trn relay
Red
Right engine cooling fan (right front of engine compt)
Right i/p junction block (in right end of dash)
Tan
Under- hood fuse block (left side of engine compt)

Manual A/C Wiring Diagram (3 of 3) for GMC Sierra HD 2008 2500

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List of elements for Manual A/C Wiring Diagram (3 of 3) for GMC Sierra HD 2008 2500:

(not used)
Air temperature actuator (top middle of hvac module)
Logic
Mode actuator (left end of hvac module)
Recirculation actuator (front a/c) (top right side of hvac module)
Tan

ANTI-LOCK BRAKES

Anti-Lock Brake Wiring Diagram, with JL4 (1 of 2) for GMC Sierra HD 2008 2500

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List of elements for Anti-Lock Brake Wiring Diagram, with JL4 (1 of 2) for GMC Sierra HD 2008 2500:

(lower left side of dash) left i/p junction block
(w/ low tire pressure, rear parking assist & remote entry) j302
12v
5v ref
6.6l
Abs pump m
Abs-1 fuse 61 fuse 56 40a
Abs-2 fuse 9 fuse 8 25a
Agle sns a
Agle sns b
Agle sns c
Angle sns
Brk sns
Can h
Can l
Comm data
Computer data lines system
Electronic brake control module (ebcm) (on left side of frame assembly)
Except 6.6l
G201 (upper left corner of dash)
G300 (below driver's door, on body mount)
G302 (below right side of passenger's seat)
Gmlan +
Gmlan -
Gnd
Hot at all times
J300
Left front wheel speed sensor (wss) (on left front steering knuckle)
Left rear wheel speed sensor (wss) (on left rear brake backing plate)
Lf whl sns
Logic
Low ref
Lr whl sns
Motor
Nca
Pwr brk h
Pwr brk l
Radio
Red
Rf whl sns
Right rear wheel speed sensor (wss) (on right rear brake backing plate)
Rr whl sns
Tan
Underhood fuse block (left side of engine compt)
Veh spd sig
W/ luxury edition
W/o luxury edition
Yaw rate & lateral acceleration sensor (under center console trim panel)

Anti-Lock Brake Wiring Diagram, with JL4 (2 of 2) for GMC Sierra HD 2008 2500

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List of elements for Anti-Lock Brake Wiring Diagram, with JL4 (2 of 2) for GMC Sierra HD 2008 2500:

(31 series: on left frame rail) (20/30 series: left rear frame rail) trailer brake controller module (tbcm)
(in instrument panel harness) (w/ power take off) j222
(outside of right front chassis frame) power take off (pto) module
(under rear of vehicle) fuel system control module (fscm)
12v
5.3l (vin 3) & 6.0l (vin k)
Abs indicator
Body control module (bcm) (lower left side of dash)
Brake booster vacuum sensor (left rear of engine compt)
Brake fluid level switch (on master cylinder)
Brake indicator
Brk sig
Comm data
Computer data lines system
Except 4.3l, 5.3l (vin o),
G201 (upper left corner of dash)
Gmlan +
Gmlan -
I/p multi-function switch
Instrument panel cluster (ipc)
Interior lights system
J201
J338
Logic
Nca
Park brake switch (on park brake pedal assembly)
Power brake booster (left rear of engine compt)
Prk brk sw
Right front wheel speed sensor (wss) (on right front steering knuckle)
Steering angle sensor (on steering column)
Stop lamp switch (top of brake pedal assembly)
Tan
Traction sw

Anti-Lock Brake Wiring Diagram, without JL4 for GMC Sierra HD 2008 2500

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List of elements for Anti-Lock Brake Wiring Diagram, without JL4 for GMC Sierra HD 2008 2500:

(below driver's door, on body mount) g300
(in instrument panel harness) (w/ power take off) j222
(lower left side of dash) left i/p junction block
(on master cylinder) brake fluid level switch
12v
4.3l
4.8l, 5.3l (vin j), 5.3l (vim m), 6.0l (vin y) & 6.2l (vin 8)
Abs indicator
Abs pump motor
Abs-1 fuse 61 40a
Abs-2 fuse 9 25a
Body control module (bcm) (lower left side of dash)
Brake indicator
Brk sig
Comm data
Computer data lines system
Electronic brake control module (ebcm) (on left side of frame assembly)
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuel system control module (fscm) (under rear of vehicle)
G201 (upper left corner of dash)
Gmlan +
Gmlan -
Gnd
Hot at all times
Instrument panel cluster (ipc)
Interior lights system
J300
J338 (4.8l, 5.3l (vin j), 5.3l (vim m), 6.0l (vin y) & 6.2l (vin 8))
Left front wheel speed sensor (wss) (on left front steering knuckle)
Lf whl sns
Logic
Nca
Park brake switch (on park brake pedal assembly)
Power take off (pto) module (outside of right front chassis frame)
Prk brk sw
Radio
Red
Rf whl sns
Right front wheel speed sensor (wss) (on right front steering knuckle)
Stop lamp switch (top of brake pedal assembly)
Tan
Trailer brake controller module (tbcm) (w/ trailer brake) (20/30 series: left rear frame rail) (31 series: on left frame rail)
Underhood fuse block (left side of engine compt)
Veh spd sig
W/ luxury edition
W/o luxury edition

Trailer ABS Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Trailer ABS Wiring Diagram for GMC Sierra HD 2008 2500:

(in camper harness, 205 cm from x414 breakout) (w/ 5th wheel trailer) j421
(in chassis harness) j422
(lower left side of dash) left i/p junction block
(on left rear body mount) g401
6.6l
Comm data
Computer data lines system
Except 6.6l
Exterior lights system
Gmlan +
Gmlan -
Grd
Hot at all times
Hot w/ run/crnk relay energized
Ign 1
Interior lights system
Itbc fuse 6 fuse 19 15a
J411
Low ref
Misc ign fuse 43 fuse 40 10a
Pnk
Rly enable
Rly feedback
Stop lamp switch (top of brake pedal assembly)
Stud 2 fuse 63 fuse 58 30a
Tan
Tcc brk sig
Trailer brake control switch
Trailer brake controller module (tbcm) (20/30 series: left rear frame rail) (31 series: on left frame rail)
Trailer brake controller solid state relay (20/30 series: left rear frame rail) (31 series: on left frame rail)
Trailer connector (at rear of vehicle)
Trl brk rly
Trl brk sig
Underhood fuse block (left side of engine compt)
W/ heavy duty trailer harness

ANTI-THEFT

Anti-theft Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Anti-theft Wiring Diagram for GMC Sierra HD 2008 2500:

(in spo theft harness)
(w/ keyless entry, active brake control)
3b2
4a7
6.6l
Acc v
Ant
Bcm fuse 10a
Body control module (bcm) (lower left side of dash)
Computer data lines system
Ddm fuse 15a
Dim fuse 15a
Dlis fuse 35 fuse 32 2a
Driver door lock/ window switch
Driver's information center
Dsm fuse 10a
Except 6.6l
Exterior lights system
G101 (on lower right radiator support)
G200 (on right front corner of hvac module)
G201 (upper left corner of dash)
G302 (below right side of passenger's seat)
Gmlan
Gnd
Grd
Hdlp rly
Headlights system
Hood ajar switch (w/ remote keyless entry) (part of hood latch assembly)
Horn rly
Horns system
Hot at all times
I/p fuse block (left side of dash)
Instrument panel cluster (ipc)
Interior lights system
Intrus sig
J101
J213
J227
J230
Keyless entry antenna
Left i/p junction block (lower left x5 side of dash)
Lf ajar sw
Logic
Lr ajar sw
Nca
Passenger door lock/ window switch
Pdm fuse 15a
Power distribution system
Prl lp rly
Remote control door lock receiver (rcdlr) (top rear of passenger compt)
Rf ajar sw
Right i/p junction block (in right x1 end of dash)
Rr ajar sw
Sec ind
Security ind
Security indicator lamp
Seo b1 fuse 52 fuse 49 15a
Sns sig
Sw sig
Tan
Theft deterrent control module (on right side of steering column)
Underhood fuse block (left side of engine compt)
Vehicle inclination sensor
Vehicle shock sensor
Volt

BODY CONTROL MODULES

Body Control Modules Wiring Diagram (1 of 3) for GMC Sierra HD 2008 2500

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List of elements for Body Control Modules Wiring Diagram (1 of 3) for GMC Sierra HD 2008 2500:

(not used)
12 volt ref
5 volt ref
Acc
Accessory volt
Ambient lt sens sig
Anti-lock brakes system
Battery +
Body control module (lower left side of dash)
Courtesy lamps ctrl
Cruise control system
Cruise ctrl sw sig
Dim fuse 15a
Exterior lights system
Fuse block (i/p) (left side of dash)
Hazrd sw left turn sig
Hazrd sw right turn sig
Hazrd sw sig
Headlamp dim sw sig
Headlamp flash to pass sig
Headlamp sw headlamp off sig
Headlamp sw headlamp on sig
Headlamp sw park lamp sig
Headlights system
Hot at all times
I/p lamps dim ctrl
Ig iii volt
Ign i volt
Ignition switch
Interior lamp defeat sw sig
Interior lights system
J213
Low ref
Off
Pnk
Power distribution system
Run
Shift interlock system
Sound systems
Sound, cruise control & transmission systems
Start
Steer whl ctrl sw sig
Tan
Tap up/tap down sw sig
Tow/haul sw sig
Traction ctrl sw sig
Transmissions system
Windshield wash sw sig
Wiper sw hi sig
Wiper sw low sig
Wiper/washer system
X201

Body Control Modules Wiring Diagram (2 of 3) for GMC Sierra HD 2008 2500

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List of elements for Body Control Modules Wiring Diagram (2 of 3) for GMC Sierra HD 2008 2500:

(gas) (diesel)
12v ref
Accessory wakeup serial data
Anti-lock brakes system
Anti-theft system
Battery +
Bcm fuse 10a
Body control module (lower left side of dash)
Brake sw sig
Computer data lines system
Cruise control system
Cruise ctrl ind dim sig
Ctsy fuse 15a
Drl relay ctrl
Exterior lights system
Fog lamp relay ctrl
Front fog lamp sw sig/enable
Fuse block (i/p) (left side of dash)
G103 (on front of right cylinder head)
G201 (upper left corner of dash)
Ground
Headlamp hi beam relay ctrl
Headlights system
Hi spd gmlan serial data bus (+)
Hi spd gmlan serial data bus (-)
Hood ajar sw sig
Hot at all times
I/p lamp dimmer sw sig
Indicator dim ctrl
Instrument cluster system
Interior lights system
Ipc fuse 46 fuse 43 10a
Is lps fuse 10a
Junction block (left i/p) (lower left side of dash)
Led backlight dim ctrl
Lo spd serial data
Lt stop trn fuse 15a
Lt trlr turn sig lamp
Outside moisture sens sig 1
Outside moisture sens sig 2
Power distribution system
Rt stop trn fuse 15a
Rt trlr turn sig lamp
Run/crank relay ctrl
Security ind ctrl
Serial data comm enable
Stop lamps fuse 15a
Tan
Underhood fuse block (left side of engine compt)
Washer relay ctrl
Wiper motor park sw sig
Wiper/washer system

Body Control Modules Wiring Diagram (3 of 3) for GMC Sierra HD 2008 2500

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List of elements for Body Control Modules Wiring Diagram (3 of 3) for GMC Sierra HD 2008 2500:

12 volt ref
Anti-theft system
Backup lamp relay ctrl
Body control module (lower left side of dash)
Cruise/etc/tcc brake sig
Current sens sig
Door lk ctrl
Door locks system
Door unlk ctrl
Drvr door key sw sig
Drvr door lk sw lk sig
Drvr door lk sw unlk sig
Drvr door unlk relay ctrl
Exterior lights system
Front windshield sw hi sig ctrl
Headlamp lo beam relay ctrl
Headlights system
Hood closed sw sig
Horn relay ctrl
Horns system
Ign iii voltage
Interior lights system
Intrusion sens alarm on sig
Intrusion sens armed sig
Lf door open sw sig
Low ref
Lr door ajar sw sig
Lt door ajar sw sig
Non drv door open sw sig
Out of park sig
Park brake sw sig
Park brake switch (on park brake pedal assembly)
Park lamp relay ctrl
Pass door lk sw lk sig
Pass dr lk sw unlk sig
Pnk
Power distribution system
Power windows system
Pwr win mstr sw lkout rear sig
Pwr win mstr sw lkout sig
Pwr win mstr sw lr dn sig
Pwr win mstr sw lr up sig
Pwr win mstr sw rr dn sig
Pwr win mstr sw rr up sig
Rf door ajar sw sig
Rr door ajar sw sig
Seats system
Starting/charging system
Tan
Wiper sw sig 2
Wiper/washer & transmission systems
Wiper/washer system

COMPUTER DATA LINES

Computer Data Lines Wiring Diagram (1 of 2) for GMC Sierra HD 2008 2500

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List of elements for Computer Data Lines Wiring Diagram (1 of 2) for GMC Sierra HD 2008 2500:

(in body harness, below passenger seat) splice pack jx339
(in i/p extension harness, behind left side of dash) splice pack jx223
(lower left side of dash) left i/p junction block
(not used)
(upfitter provisional)
2 or more
3b1
Audio amplifier (if equipped) (under rear of center console)
Body control module (bcm) (lower left side of dash)
Chime module (center of dash, behind radio)
Data link connector (dlc) (lower left side of dash)
Digital radio receiver (behind right end of dash)
Digital radio receiver (if equipped) (behind right end of dash)
Driver door lock/window switch (if equipped)
G200 (on right front corner of hvac module)
G201 (upper left corner of dash)
Ground distribution system
Hot at all times
Hvac control module
I/p fuse block (left side of dash)
Inflatable restraint front passenger presence system (pps) module (if equipped) (under front passenger seat)
Inflatable restraint sensing & diagnostic module (sdm) (under driver's seat)
Inflatable restraint vehicle rollover sensor (if equipped) (below center console)
Instrument panel cluster (ipc)
J200
Left i/p junction block (lower left side of dash)
Lo speed serial data
Lo-speed serial data
Low speed gmlan serial data
Ltr fuse 53 (except 6.6l) fuse 50 (6.6l) 20a
Memory seat module (w/ front individual non bucket seat) (under front of driver's seat)
Of w/ onstar, digital radio & rear seat & earphone jacks radio control
Passenger door lock/window switch (if equipped)
Power distribution system
Radio
Rear object sensor control module (at rear cargo area, behind trim panel)
Rear seat audio (rsa) control
Rear seat audio (rsa) control (if equipped)
Remote control door lock receiver (rcdlr) (top rear of passenger compt)
Right i/p junction block (in right end of dash)
Splice pack jx221 (in the i/p harness, behind left side of dash)
Tan
Theft deterrent control module (on right side of steering column)
Underhood fuse block (left side of engine compt)
Vehicle communication interface module (vcim) (behind center of dash)
Vehicle communication interface module (vcim) (if equipped) (behind center of dash)
W/ digital radio
W/ digital radio, rear seat, onstar & earphone jacks radio control
W/ luxury edition
W/ onstar
W/ radio provisions
W/ rear seat & earphone jacks radio control
W/o luxury edition
W/o radio provisions

Computer Data Lines Wiring Diagram (2 of 2) for GMC Sierra HD 2008 2500

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List of elements for Computer Data Lines Wiring Diagram (2 of 2) for GMC Sierra HD 2008 2500:

(w/ trailer brake & except 4.3l, 5.3l (vin 0), 6.6l, 6.0l (vin k) & 5.3l (vin 3)) j338
4.3l
5.3l (vin 0), 6.0l (vin k) & w/ trailer brake
5.3l (vin 0), 6.0l (vin k) & w/o trailer brake
6.0l (vin y), 4.3l, 4.8l & 5.3l
6.2l except 6.2l & 6.6l
6.6l
6.6l 6.2l & 6.0l (vin k)
Accessory wakeup serial data
Body control module (bcm) (lower left side of dash)
Data link resistor
Electronic brake control module (ebcm) (on left side of frame assembly)
Engine control module (ecm) (left front of engine compartment, near fan shroud)
Except 4.3l & 6.6l
Except 4.3l, 6.6l, 5.3l (vin 0), 6.0l (vin k) & 5.3l (vin 3)
Except 6.6l
Fuel system control module (fscm) (except 4.3l, 6.6l, 5.3l (vin 0), 6.0l (vin k) & 5.3l (vin 3)) (under rear of vehicle)
Glow plug control module (gpcm) (6.6l) (top left rear of engine)
Hb01
Hb04
Hb05
Hb06
Hb20
Hi spd gmlan serial data +
Hi spd gmlan serial data -
High speed gmlan serial data bus +
High speed gmlan serial data bus -
J104 (in engine harness, 5 cm from engine control module connector breakout)
J207 (w/ auto & electronic 4x4) (in instrument panel harness, in transfer case shift control module connector breakout)
J222 (w/ pto) (in instrument panel harness)
Left i/p junction block (lower left side of dash)
Power take off (pto) module (outside of right front chassis frame)
Serial data comm enable
Tan
Terminator
Trailer brake controller module (tbcm) (w/ trailer brake) (20/30 series: left rear frame rail) (31 series: on left frame rail)
Transfer case shift control module (w/ auto & electronic 4x4) (lower left side of dash)
Transmission control module (tcm) (left front of engine compartment, near fan shroud)
Vehicle communication interface module (vcim) (behind center of dash)
W/ auto & electronic 4x4
W/ hydraulic brakes
W/ onstar
W/ pto
W/ trailer brake
W/o auto & electronic 4x4
W/o hydraulic brakes
W/o onstar
W/o pto
W/o trailer brake

COOLING FAN

Cooling Fan Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Cooling Fan Wiring Diagram for GMC Sierra HD 2008 2500:

(near compressor, on a/c high pressure hose) a/c refrigerant pressure sensor
(on lower right radiator support) g101
4.3l
6.6l
87a
Automatic a/c
Colnt lvl
Cool/ fan relay 1
Cooling fan diode 1
Cooling fan diode 2
Engine control module (ecm) (left front of engine compt, near fan shroud)
Engine coolant level switch (6.6l) (on bottom of surge tank)
Engine coolant temperature (ect) sensor (4.3l: left side of dash) (except 4.3l & 6.6l: on top of engine) (6.6l: top front center of engine)
Except 6.6l & 4.3l
Except 6.6l & 6.0l (vin k)
Fan cntrl relay
Fan lo relay
Fan-1 fuse 60 40a
Fan-2 fuse 62 40a
G100 (on lower left radiator support)
G103 (on front of right cylinder head)
Hot at all times
Hvac control module
J100
J101
J106
Left engine cooling fan (left front of engine compt)
Logic
Manual a/c
Pwr/ trn relay
Right engine cooling fan (right front of engine compt)
Tan
Under- hood fuse block (left side of engine compt)

CRUISE CONTROL

4.3L VIN X

4.3L VIN X, Cruise Control Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 4.3L VIN X, Cruise Control Wiring Diagram for GMC Sierra HD 2008 2500:

(left front of engine compt, near fan shroud)
(or pnk)
12v
5v ref
5v ref 2
Accelerator pedal position (app) sensor (above accelerator pedal)
App sen 1 sig
App sen 2 sig
Bat pos volt
Batt +
Body control module (bcm) (lower left side of dash)
Brake sw sig
Cancel
Column harness)
Computer data lines system
Cruise control ind dimming sig
Cruise control switch signal
Cruise ind
Cruise switch
Dim fuse 15a
Ecm batt fuse 13 10a
Engine control module (ecm) (left front of engine compt, near fan shroud)
Exterior lights system
G103 (on front of right cylinder head)
G201 (upper left corner of dash)
Gmlan data bus+
Gmlan data bus-
Ground
Hi spd gmlan ser data bus+
Hi spd gmlan ser data bus-
Hot at all times
Hot w/ run/crank relay energized
I/p fuse block (left side of dash)
Inflatable restraint steering wheel module coil (behind steering wheel)
Instrument panel cluster (ipc)
Interior lights system
Ipc fuse 46 10a
J106
J216 (in the steering pnk
J217 (9 cm from inflatable restraint steering wheel module coil x2)
Left i/p junction block (lower left side of dash)
Left steering wheel control switch assembly
Logic
Low ref
Misc ign fuse 43 10a
Pnk
Res+
Ser data
Ser data bus+
Ser data bus-
Set-
Sound systems
Steering wheel cntrl sup volt
Stop lamp switch (top of brake pedal assembly)
Tac motor ctrl 1
Tac motor ctrl 2
Tan
Throttle body
Tp sens 1 sig
Tp sens 2 sig
Transmission control module (tcm)
Transmissions system
Underhood fuse block (left side of engine compt)
Vehicle speed sensor (vss) (on transmission tailshaft housing)
Vss hi sig
Vss lo sig

4.8L VIN C

4.8L VIN C, Cruise Control Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 4.8L VIN C, Cruise Control Wiring Diagram for GMC Sierra HD 2008 2500:

(left front of engine compt, near fan shroud)
(or pnk)
12v
2wd
5v ref
5v ref 2
Accelerator pedal position (app) sensor (above accelerator pedal)
App sen 1 sig
App sen 2 sig
Batt +
Body control module (bcm) (lower left side of dash)
Brake sw sig
Cancel
Column harness)
Computer data lines system
Cruise control ind dimming sig
Cruise control switch signal
Cruise ind
Cruise switch
Dim fuse 15a
Ecm batt fuse 12 10a
Engine control module (ecm) (left front of engine compt, near fan shroud)
Exterior lights system
G103 (on front of right cylinder head)
G201 (upper left corner of dash)
Gmlan data bus+
Gmlan data bus-
Ground
Hi spd gmlan ser data bus+
Hi spd gmlan ser data bus-
Hot at all times
Hot w/ run/crank relay energized
I/p fuse block (left side of dash)
Inflatable restraint steering wheel module coil (behind steering wheel)
Instrument panel cluster (ipc)
Interior lights system
Ipc fuse 46 10a
J106
J216 (in the steering pnk
J217 (9 cm from inflatable restraint steering wheel module coil x2)
Left i/p junction block (lower left side of dash)
Left steering wheel control switch assembly
Logic
Low ref
Misc ign fuse 43 10a
Pnk
Res+
Ser data
Ser data bus+
Ser data bus-
Set-
Sound systems
Steering wheel cntrl sup volt
Stop lamp sw sig
Stop lamp switch (top of brake pedal assembly)
Tac motor ctrl 1
Tac motor ctrl 2
Tan
Throttle body
Tp sens 1 sig
Tp sens 2 sig
Transmission control module (tcm)
Transmissions system
Underhood fuse block (left side of engine compt)
Vehicle speed sensor (vss) (on transmission tailshaft housing)
Vss hi sig
Vss lo sig

5.3L VIN 0

5.3L VIN 0, Cruise Control Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 0, Cruise Control Wiring Diagram for GMC Sierra HD 2008 2500:

(left front of engine compt, near fan shroud)
(or pnk)
12v
2wd
5v ref
5v ref 2
Accelerator pedal position (app) sensor (above accelerator pedal)
App sen 1 sig
App sen 2 sig
Batt +
Body control module (bcm) (lower left side of dash)
Brake sw sig
Cancel
Column harness)
Computer data lines system
Cruise control ind dimming sig
Cruise control switch signal
Cruise ind
Cruise switch
Dim fuse 15a
Ecm batt fuse 12 10a
Engine control module (ecm) (left front of engine compt, near fan shroud)
Exterior lights system
G103 (on front of right cylinder head)
G201 (upper left corner of dash)
Gmlan data bus+
Gmlan data bus-
Ground
Hi spd gmlan ser data bus+
Hi spd gmlan ser data bus-
Hot at all times
Hot w/ run/crank relay energized
I/p fuse block (left side of dash)
Inflatable restraint steering wheel module coil (behind steering wheel)
Instrument panel cluster (ipc)
Interior lights system
Ipc fuse 46 10a
J106
J216 (in the steering pnk
J217 (9 cm from inflatable restraint steering wheel module coil x2)
Left i/p junction block (lower left side of dash)
Left steering wheel control switch assembly
Logic
Low ref
Misc ign fuse 43 10a
Pnk
Res+
Ser data
Ser data bus+
Ser data bus-
Set-
Sound systems
Steering wheel cntrl sup volt
Stop lamp sw sig
Stop lamp switch (top of brake pedal assembly)
Tac motor ctrl 1
Tac motor ctrl 2
Tan
Throttle body
Tp sens 1 sig
Tp sens 2 sig
Transmission control module (tcm)
Transmissions system
Underhood fuse block (left side of engine compt)
Vehicle speed sensor (vss) (on transmission tailshaft housing)
Vss hi sig
Vss lo sig

5.3L VIN 3

5.3L VIN 3, Cruise Control Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 3, Cruise Control Wiring Diagram for GMC Sierra HD 2008 2500:

(left front of engine compt, near fan shroud)
(or pnk)
12v
2wd
5v ref
5v ref 2
Accelerator pedal position (app) sensor (above accelerator pedal)
App sen 1 sig
App sen 2 sig
Batt +
Body control module (bcm) (lower left side of dash)
Brake sw sig
Cancel
Column harness)
Computer data lines system
Cruise control ind dimming sig
Cruise control switch signal
Cruise ind
Cruise switch
Dim fuse 15a
Ecm batt fuse 12 10a
Engine control module (ecm) (left front of engine compt, near fan shroud)
Exterior lights system
G103 (on front of right cylinder head)
G201 (upper left corner of dash)
Gmlan data bus+
Gmlan data bus-
Ground
Hi spd gmlan ser data bus+
Hi spd gmlan ser data bus-
Hot at all times
Hot w/ run/crank relay energized
I/p fuse block (left side of dash)
Inflatable restraint steering wheel module coil (behind steering wheel)
Instrument panel cluster (ipc)
Interior lights system
Ipc fuse 46 10a
J106
J216 (in the steering pnk
J217 (9 cm from inflatable restraint steering wheel module coil x2)
Left i/p junction block (lower left side of dash)
Left steering wheel control switch assembly
Logic
Low ref
Misc ign fuse 43 10a
Pnk
Res+
Ser data
Ser data bus+
Ser data bus-
Set-
Sound systems
Steering wheel cntrl sup volt
Stop lamp sw sig
Stop lamp switch (top of brake pedal assembly)
Tac motor ctrl 1
Tac motor ctrl 2
Tan
Throttle body
Tp sens 1 sig
Tp sens 2 sig
Transmission control module (tcm)
Transmissions system
Underhood fuse block (left side of engine compt)
Vehicle speed sensor (vss) (on transmission tailshaft housing)
Vss hi sig
Vss lo sig

5.3L VIN J

5.3L VIN J, Cruise Control Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN J, Cruise Control Wiring Diagram for GMC Sierra HD 2008 2500:

(left front of engine compt, near fan shroud)
(or pnk)
12v
2wd
5v ref
5v ref 2
Accelerator pedal position (app) sensor (above accelerator pedal)
App sen 1 sig
App sen 2 sig
Batt +
Body control module (bcm) (lower left side of dash)
Brake sw sig
Cancel
Column harness)
Computer data lines system
Cruise control ind dimming sig
Cruise control switch signal
Cruise ind
Cruise switch
Dim fuse 15a
Ecm batt fuse 12 10a
Engine control module (ecm) (left front of engine compt, near fan shroud)
Exterior lights system
G103 (on front of right cylinder head)
G201 (upper left corner of dash)
Gmlan data bus+
Gmlan data bus-
Ground
Hi spd gmlan ser data bus+
Hi spd gmlan ser data bus-
Hot at all times
Hot w/ run/crank relay energized
I/p fuse block (left side of dash)
Inflatable restraint steering wheel module coil (behind steering wheel)
Instrument panel cluster (ipc)
Interior lights system
Ipc fuse 46 10a
J106
J216 (in the steering pnk
J217 (9 cm from inflatable restraint steering wheel module coil x2)
Left i/p junction block (lower left side of dash)
Left steering wheel control switch assembly
Logic
Low ref
Misc ign fuse 43 10a
Pnk
Res+
Ser data
Ser data bus+
Ser data bus-
Set-
Sound systems
Steering wheel cntrl sup volt
Stop lamp sw sig
Stop lamp switch (top of brake pedal assembly)
Tac motor ctrl 1
Tac motor ctrl 2
Tan
Throttle body
Tp sens 1 sig
Tp sens 2 sig
Transmission control module (tcm)
Transmissions system
Underhood fuse block (left side of engine compt)
Vehicle speed sensor (vss) (on transmission tailshaft housing)
Vss hi sig
Vss lo sig

5.3L VIN M

5.3L VIN M, Cruise Control Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN M, Cruise Control Wiring Diagram for GMC Sierra HD 2008 2500:

(left front of engine compt, near fan shroud)
(or pnk)
12v
2wd
5v ref
5v ref 2
Accelerator pedal position (app) sensor (above accelerator pedal)
App sen 1 sig
App sen 2 sig
Batt +
Body control module (bcm) (lower left side of dash)
Brake sw sig
Cancel
Column harness)
Computer data lines system
Cruise control ind dimming sig
Cruise control switch signal
Cruise ind
Cruise switch
Dim fuse 15a
Ecm batt fuse 12 10a
Engine control module (ecm) (left front of engine compt, near fan shroud)
Exterior lights system
G103 (on front of right cylinder head)
G201 (upper left corner of dash)
Gmlan data bus+
Gmlan data bus-
Ground
Hi spd gmlan ser data bus+
Hi spd gmlan ser data bus-
Hot at all times
Hot w/ run/crank relay energized
I/p fuse block (left side of dash)
Inflatable restraint steering wheel module coil (behind steering wheel)
Instrument panel cluster (ipc)
Interior lights system
Ipc fuse 46 10a
J106
J216 (in the steering pnk
J217 (9 cm from inflatable restraint steering wheel module coil x2)
Left i/p junction block (lower left side of dash)
Left steering wheel control switch assembly
Logic
Low ref
Misc ign fuse 43 10a
Pnk
Res+
Ser data
Ser data bus+
Ser data bus-
Set-
Sound systems
Steering wheel cntrl sup volt
Stop lamp sw sig
Stop lamp switch (top of brake pedal assembly)
Tac motor ctrl 1
Tac motor ctrl 2
Tan
Throttle body
Tp sens 1 sig
Tp sens 2 sig
Transmission control module (tcm)
Transmissions system
Underhood fuse block (left side of engine compt)
Vehicle speed sensor (vss) (on transmission tailshaft housing)
Vss hi sig
Vss lo sig

6.0L VIN Y

6.0L VIN Y, Cruise Control Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 6.0L VIN Y, Cruise Control Wiring Diagram for GMC Sierra HD 2008 2500:

(left front of engine compt, near fan shroud)
(or pnk)
12v
2wd
5v ref
5v ref 2
Accelerator pedal position (app) sensor (above accelerator pedal)
App sen 1 sig
App sen 2 sig
Batt +
Body control module (bcm) (lower left side of dash)
Brake sw sig
Cancel
Column harness)
Computer data lines system
Cruise control ind dimming sig
Cruise control switch signal
Cruise ind
Cruise switch
Dim fuse 15a
Ecm batt fuse 12 10a
Engine control module (ecm) (left front of engine compt, near fan shroud)
Exterior lights system
G103 (on front of right cylinder head)
G201 (upper left corner of dash)
Gmlan data bus+
Gmlan data bus-
Ground
Hi spd gmlan ser data bus+
Hi spd gmlan ser data bus-
Hot at all times
Hot w/ run/crank relay energized
I/p fuse block (left side of dash)
Inflatable restraint steering wheel module coil (behind steering wheel)
Instrument panel cluster (ipc)
Interior lights system
Ipc fuse 46 10a
J106
J216 (in the steering pnk
J217 (9 cm from inflatable restraint steering wheel module coil x2)
Left i/p junction block (lower left side of dash)
Left steering wheel control switch assembly
Logic
Low ref
Misc ign fuse 43 10a
Pnk
Res+
Ser data
Ser data bus+
Ser data bus-
Set-
Sound systems
Steering wheel cntrl sup volt
Stop lamp sw sig
Stop lamp switch (top of brake pedal assembly)
Tac motor ctrl 1
Tac motor ctrl 2
Tan
Throttle body
Tp sens 1 sig
Tp sens 2 sig
Transmission control module (tcm)
Transmissions system
Underhood fuse block (left side of engine compt)
Vehicle speed sensor (vss) (on transmission tailshaft housing)
Vss hi sig
Vss lo sig

6.2L VIN 8

6.2L VIN 8, Cruise Control Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 6.2L VIN 8, Cruise Control Wiring Diagram for GMC Sierra HD 2008 2500:

(or pnk)
12v
5v ref
5v ref 2
Accelerator pedal position (app) sensor (above accelerator pedal)
App sen 1 sig
App sen 2 sig
Automatic transmission
Batt +
Body control module (bcm) (lower left side of dash)
Brake sw sig
Cancel
Column harness)
Computer data lines system
Control solenoid valve assembly
Cruise control ind dimming sig
Cruise control switch signal
Cruise ind
Cruise switch
Data bus +
Data bus -
Dim fuse 15a
Ecm batt fuse 12 10a
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 6.0l 4wd
Exterior lights system
G103 (on front of right cylinder head)
G201 (upper left corner of dash)
Ground
Hi spd gmlan ser data bus+
Hi spd gmlan ser data bus-
Hot at all times
Hot w/ run/crank relay energized
I/p fuse block (left side of dash)
Inflatable restraint steering wheel module coil (behind steering wheel)
Input speed sensor (iss)
Input speed sensor (iss) signal
Instrument panel cluster (ipc)
Interior lights system
Ipc fuse 46 10a
J106
J127
J216 (in the steering pnk
J217 (9 cm from inflatable restraint steering wheel module coil x2)
Left i/p junction block (lower left side of dash)
Left steering wheel control switch assembly
Logic
Low ref
Misc ign fuse 43 10a
Output speed sensor (oss)
Output speed sensor (oss) signal
Pnk
Red
Res+
Ser data
Ser data bus+
Ser data bus-
Set-
Sound systems
Steering wheel cntrl sup volt
Stop lamp sw sig
Stop lamp switch (top of brake pedal assembly)
Tac motor ctrl 1
Tac motor ctrl 2
Tan
Throttle body
Tp sens 1 sig
Tp sens 2 sig
Transmission control module (tcm)
Transmissions system
Underhood fuse block (left side of engine compt)

DEFOGGERS

Heated Mirrors Wiring Diagram, with AN3/DL3 for GMC Sierra HD 2008 2500

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List of elements for Heated Mirrors Wiring Diagram, with AN3/DL3 for GMC Sierra HD 2008 2500:

3b2
4a7
B4 x4
Battery
Computer data lines system
Ddm fuse 15a
Driver door lock/ window switch
Driver outside rearview mirror
G200 (on right front corner of hvac module)
G201 (upper left corner of dash)
Ground
Hot at all times
Hvac control module
I/p fuse block (left side of dash)
Logic
Low ref
Passenger door lock/window switch
Passenger outside rearview mirror
Pdm fuse 15a
Power distribution system
Rear defogger ind
Rear defogger switch
Right i/p junction block (in right end of dash)
Serial data

Heated Mirrors Wiring Diagram, without AN3/DL3 for GMC Sierra HD 2008 2500

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List of elements for Heated Mirrors Wiring Diagram, without AN3/DL3 for GMC Sierra HD 2008 2500:

(6.6l) (except 6.6l & 4.3l) (4.3l)
(except 6.6l) (6.6l)
A7 x4
Automatic a/c
D5 x4
Driver outside rearview mirror
G103 g102 g107 (6.6l: on front of right cylinder head) (except 6.6l & 4.3l: on lower left front of engine) (4.3l: top left rear of engine)
G200 (on right front corner of hvac module)
G201 (upper left corner of dash)
Hot at all times
Htd mir fuse 53 fuse 51 30a
Hvac control module
J105
J502
J603
Logic
Manual a/c
N5 x2
Nca
Passenger outside rearview mirror
Rear defog relay
Rear defogger ind
Rear defogger switch
Underhood fuse block (left side of engine compt)

Rear Defogger Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Rear Defogger Wiring Diagram for GMC Sierra HD 2008 2500:

(6.6l) (except 6.6l & 4.3l) (4.3l)
(except 6.6l) (6.6l)
(except crew cab) (crew cab)
A x1
A x2
A7 x4
Automatic a/c
B5 x4
G103 g102 g107 (6.6l: on front of right cylinder head) (except 6.6l & 4.3l: on lower left front of engine) (4.3l: top left rear of engine)
G304 g307 (except crew cab: on lower right "b" pillar) (crew cab: at right rear corner of passenger compartment)
Hot at all times
Hvac control module
J105
Logic
Manual a/c
N5 x2
Rear defog fuse 52 fuse 50 30a
Rear defog relay
Rear defogger ind
Rear defogger switch
Rear window defogger grid
Underhood fuse block (left side of engine compt)

ENGINE PERFORMANCE

4.3L VIN X

4.3L VIN X, Engine Performance Wiring Diagram (1 of 4) for GMC Sierra HD 2008 2500

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List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (1 of 4) for GMC Sierra HD 2008 2500:

(top left rear of engine)
4wd lo
5v ref1
5v ref2
A/c cl ctl
A/c pres sig
Acc ser data
Accelerator pedal position (app) sensor (above accelerator pedal)
Air conditioning system
Anti-lock brakes system
App1 sig
App2 sig
Axl sw sig
Cfan hi ctl
Cfan lo ctl
Computer data lines system
Cooling fans system
Engine control module (ecm) (left front of engine compt, near fan shroud)
Evap vent
Evaporative emissions (evap) canister vent solenoid valve (under rear of vehicle)
Fp rly ctl
Ftp sig
Fuel lvl
Fuel pmp relay
Fuel pump fuse 20 20a
Fuel tank pressure (ftp) sensor (on fuel pump & sender assembly)
G106 (right rear of engine)
G107
G300 (below driver's door, on body mount)
Gmlan (+)
Gmlan (-)
Gnd
Heated oxygen sensor (ho2s) bank 1 sensor 2 (near left side of engine)
Heated oxygen sensor (ho2s) bank 2 sensor 2 (near right side of engine)
Ho2s hi b1s2
Ho2s hi b2s2
Ho2s ht b1s2
Ho2s ht b2s2
Ho2s lo b1s2
Ho2s lo b2s2
Hot at all times
Iat sensor
Iat sig
Ig1
Ign
J105
J106
J331 (in chassis harness)
Lo ref
Maf
Maf sig
Mass air flow (maf)/intake air temperature (iat) sensor (right front of engine)
Mil ctl
Nca
P/n sig
Pnk
Pnk b
Primary fuel pump & sender assembly (inside fuel tank)
Pwtn rly ctl
Signal
Starting/ charging system
Strt rly ctl
Tan
Tan d
Tan e
Tcc sig
Tos sig
Transmissions system
Transmissions system exterior lights system
Underhood fuse block (left side of engine compt)
Vss

4.3L VIN X, Engine Performance Wiring Diagram (2 of 4) for GMC Sierra HD 2008 2500

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List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (2 of 4) for GMC Sierra HD 2008 2500:

Central sequential fuel injection (sfi) module (top rear of engine)
Ecm- batt fuse 12 10a
Ecm- ign fuse 56 15a
Ecm/throt cont fuse 5 15a
Eng fuse 4 15a
Fuel injectors (top of left cylinder bank)
Fuel injectors (top of right cylinder bank)
Hot at all times
Hot in run or start
Inj-a fuse 24 20a
J128 (in engine harness)
O2-b snsr fuse 8 10a
Pnk
Pnk b
Pnk d
Pnk e
Pnk h
Pnk j
Pnk l
Pwr/ trn relay
Tan
Tan f
Tcm- batt fuse 14 10a
To o2-a snsr fuse (diagram 3 of 4)
Underhood fuse block (left side of engine compt)

4.3L VIN X, Engine Performance Wiring Diagram (3 of 4) for GMC Sierra HD 2008 2500

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List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (3 of 4) for GMC Sierra HD 2008 2500:

(lower left side of dash) left i/p junction block
(upper left corner of dash)
(w/ steering wheel heater) j220
Aux hvac- ign fuse 48 1oa
Brake fluid level switch (on master cylinder)
Computer data lines system
Engine oil pressure (eop) sensor (rear of engine)
Engine oil pressure ind
From inj-a fuse (diagram 2 of 4)
G103 (on front of right cylinder head)
G201
Gnd
Heated oxygen sensor (ho2s) bank 1 sensor 1 (near left side of engine)
Heated oxygen sensor (ho2s) bank 2 sensor 1 (near right side of engine)
Hot at all times
Hot in run or start
Ic1
Ic2
Ic3
Ign
Ign 1
Ignition control module (icm) (rear of engine)
Instrument panel cluster (ipc)
Ipc fuse 46 10a
Lo bus
Lo ref
Logic
Malfunction indicator lamp
Manifold absolute pressure (map) sensor (top rear of engine)
Nca
O2-a snsr fuse 18 10a
Pnk
Pnk f
Tan
Throttle body
Underhood fuse block (left side of engine compt)

4.3L VIN X, Engine Performance Wiring Diagram (4 of 4) for GMC Sierra HD 2008 2500

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List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (4 of 4) for GMC Sierra HD 2008 2500:

5v ref1
5v ref2
Camshaft position sensor
Chg ind sig
Ckp sig
Cmp sig
Crankshaft position sensor (front of engine, right of crank pulley)
Ect sig
Engine control module (ecm) (left front of engine compt, near fan shroud)
Engine coolant temperature sensor (left side of engine)
Evaporative emission (evap) canister purge solenoid valve (top left rear of engine)
G106 (right rear of engine)
Gen fdc sig
Gnd
Ho2s hi b1s1
Ho2s hi b2s1
Ho2s htr b1s1
Ho2s htr b2s1
Ho2s lo b1s1
Ho2s lo b2s1
Ic 1 ctrl
Ic 2 ctrl
Ic 3 ctrl
Inj 1 ctrl
Inj 2 ctrl
Inj 3 ctrl
Inj 4 ctrl
Inj 5 ctrl
Inj 6 ctrl
J106
Knock sensor 1 (lower left side of engine)
Knock sensor 2 (lower right side of engine)
Ks1 sig
Ks2 sig
Lo ref
Map sig
Oil press sig
Pnk
Red
Sol ctrl
Starting/ charging system
Starting/charging system
Tac mot ctl 1
Tac mot ctl 2
Tan
Tp1 sig
Tp2 sig

4.8L VIN C

4.8L VIN C, Engine Performance Wiring Diagram (1 of 5) for GMC Sierra HD 2008 2500

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List of elements for 4.8L VIN C, Engine Performance Wiring Diagram (1 of 5) for GMC Sierra HD 2008 2500:

(in chassis
(on fuel pump & sender assembly)
(or 821)
4wd lo sig
5v ref(ac)
5v ref1
5v ref2
A/c cl ctl
A/c pres sig
Acc ser data
Air conditioning system
Anti-lock brakes system cooling fans system
App1 sig
App2 sig
Axl sw sig
Brk sw sig
Cfan hi ctl
Cfan lo ctl
Computer data lines system
Cooling fans system
Engine control module (ecm) (left front of engine compt, near fan shroud)
Evap vent
Evaporative emissions (evap) canister vent solenoid valve (under rear of vehicle)
Exterior lights system
Front fuel pump & sender assembly (in front fuel tank)
Ftp sig
Fuel ctl
Fuel lvl-pri
Fuel tank pressure (ftp) sensor
G103 (on front of right cylinder head)
Gmlan (+)
Gmlan (-)
Gnd
Harness)
Heated oxygen sensor (ho2s) bank 1 sensor 2 (downstream of left catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 2 (downstream of right catalytic converter)
Ho2s hi b1s2
Ho2s hi b2s2
Ho2s ht b1s2
Ho2s ht b2s2
Ho2s lo b1s2
Ho2s lo b2s2
Iat sig
Ig1
J106
J331
Lo ref
Maf sig
Mil ctl
Nca
P/n sig
Pnk
Pwtn rly ctl
Starting/ charging system
Strt rly ctl
Tan
Tos sig or
Transmissions system
Vss
Vss hi sig
Vss lo sig

4.8L VIN C, Engine Performance Wiring Diagram (2 of 5) for GMC Sierra HD 2008 2500

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List of elements for 4.8L VIN C, Engine Performance Wiring Diagram (2 of 5) for GMC Sierra HD 2008 2500:

5v ref
Computer data lines system
Ecm- ign fuse 56 15a
Fscm fuse 21 20a
Fscm shield
Fuel ctl
Fuel line pressure sensor (under left side of vehicle)
Fuel pres
Fuel system control module (fscm) (under rear of vehicle)
G300 (below driver's door, on body mount)
Gmlan (+)
Gmlan (-)
Gnd
Hot at all times
Hot in run or start
Ig1
J300
Lo ref
Pnk
Pump (+)
Ser data en
Tan
Underhood fuse block (left side of engine compt)

4.8L VIN C, Engine Performance Wiring Diagram (3 of 5) for GMC Sierra HD 2008 2500

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List of elements for 4.8L VIN C, Engine Performance Wiring Diagram (3 of 5) for GMC Sierra HD 2008 2500:

(front of engine) (6.0l & 6.2l) camshaft actuator solenoid
(not used)
Accelerator pedal position (app) sensor (above accelerator pedal)
Ecm- batt fuse 12 10a
Ecm/throt cont fuse 5 15a
Eng fuse 4 15a
Fuel injectors (top of left cylinder bank)
Fuel injectors (top of right cylinder bank)
G103 (on front of right cylinder head)
Hot at all times
Iat
Inj-a fuse 24 20a
Inj-b fuse 13 20a
J106
Maf
Mass air flow (maf)/intake air temperature (iat) sensor (right front of engine compt)
O2-b snsr fuse 8 10a
Pnk
Pnk a
Pnk b
Pwr/ trn relay
Tan
Tan b
Tan e
Tcm- batt fuse 14 10a
To o2-a snsr fuse (diagram 4 of 5)
Underhood fuse block (left side of engine compt)

4.8L VIN C, Engine Performance Wiring Diagram (4 of 5) for GMC Sierra HD 2008 2500

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List of elements for 4.8L VIN C, Engine Performance Wiring Diagram (4 of 5) for GMC Sierra HD 2008 2500:

(lower left side of dash) left i/p junction block
(on front of right cylinder head)
(on right side of engine oil pan) engine oil level switch
(upper left corner of dash)
(w/ steering wheel heater) j220
Aux hvac- ign fuse 48 1oa
Brake fluid level switch (on master cylinder)
Camshaft position sensor (front of engine, above crank pulley)
Computer data lines system
Crankshaft position sensor (right rear of engine)
Engine coolant temperature (ect) sensor (on top of engine)
Engine oil pressure (eop) sensor (top rear of engine)
Engine oil pressure ind
From inj-b fuse (diagram 3 of 5)
G103
G201
Gnd
Heated oxygen sensor (ho2s) bank 1 sensor 1 (upstream of left catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 1 (upstream of right catalytic converter)
Hot at all times
Hot in run or start
Ign
Ign 1
Instrument panel cluster (ipc)
Ipc fuse 46 10a
J106
Knock sensor 1 (lower left side of engine)
Knock sensor 2 (lower right side of engine)
Lo bus
Logic
Malfunction indicator lamp
Manifold absolute pressure (map) sensor (on top of intake manifold)
Nca
O2-a snsr fuse 18 10a
Pnk
Tan
Underhood fuse block (left side of engine compt)

4.8L VIN C, Engine Performance Wiring Diagram (5 of 5) for GMC Sierra HD 2008 2500

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List of elements for 4.8L VIN C, Engine Performance Wiring Diagram (5 of 5) for GMC Sierra HD 2008 2500:

(below intake manifold) (except 4.8l) valve lifter oil manifold (vlom) assembly
(in ignition coil jumper harness, 5 cm from x111 breakout)
(on intake manifold) evaporative emission (evap) canister purge solenoid valve
(upper left side of engine)
(upper right side of engine)
5v ref1
5v ref2
A pnk
Cam sol ctl
Chg ind sig
Ckp sig
Cmp sig
Ctrl
Cyl off ctl 1
Cyl off ctl 2
Cyl off ctl 3
Cyl off ctl 4
Cylinder shutoff solenoid 1, cyl 1
Cylinder shutoff solenoid 2, cyl 4
Cylinder shutoff solenoid 3, cyl 6
Cylinder shutoff solenoid 4, cyl 7
E pnk
Ect sig
Engine control module (ecm) (left front of engine compt, near fan shroud)
Eop sig
G102 (on lower left front of engine)
Gen fdc sig
Gnd
Ho2s hi b1s1
Ho2s hi b2s1
Ho2s ht b1s1
Ho2s ht b2s1
Ho2s lo b1s1
Ho2s lo b2s1
Ic 1 ctl
Ic 2 ctl
Ic 3 ctl
Ic 4 ctl
Ic 5 ctl
Ic 6 ctl
Ic 7 ctl
Ic 8 ctl
Ign
Ignition coils
Inj 1 ctl
Inj 2 ctl
Inj 3 ctl
Inj 4 ctl
Inj 5 ctl
Inj 6 ctl
Inj 7 ctl
Inj 8 ctl
J107
J108
J109
J110
J111
J112
Ks1 sig
Ks2 sig
Lo ref
Map sig
Nca
Nca nca
Oil lvl sw sig
Pnk
Pnk d
Red c
Ref lo
Sol ctrl
Spark plug
Spark spark plug plug
Starting/ charging system
Starting/charging system
Tac mot ctl 1
Tac mot ctl 2
Tan
Throttle body
Tp sens1 sig
Tp sens2 sig

5.3L VIN 0

5.3L VIN 0, Engine Performance Wiring Diagram (1 of 4) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 0, Engine Performance Wiring Diagram (1 of 4) for GMC Sierra HD 2008 2500:

(below driver's door, on body mount)
(below driver's door, on body mount) g300
(in chassis harness)
(on fuel pump & sender assembly)
(on lower left front of engine) g102
(or 821)
4wd lo sig
5v ref(ac)
5v ref1
5v ref2
A/c cl ctl
A/c pres sig
Acc ser data
Air conditioning system
Anti-lock brakes system cooling fans system
App1 sig
App2 sig
Axl sw sig
Brk sw sig
Cfan hi ctl
Cfan lo ctl
Computer data lines system
Cooling fans system
Engine control module (ecm) (left front of engine compt, near fan shroud)
Evap vent
Evaporative emissions (evap) canister vent solenoid valve (under rear of vehicle)
Exterior lights system
Ftp sig
Fuel ctl
Fuel ctl-sec
Fuel lvl-pri
Fuel lvl-sec
Fuel pmp relay
Fuel pump fuse 20 20a
Fuel tank pressure (ftp) sensor
G103 (on front of right cylinder head)
G300
Gmlan (+)
Gmlan (-)
Gnd
Heated oxygen sensor (ho2s) bank 1 sensor 2 (downstream of left catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 2 (downstream of right catalytic converter)
Ho2s hi b1s2
Ho2s hi b2s2
Ho2s ht b1s2
Ho2s ht b2s2
Ho2s lo b1s2
Ho2s lo b2s2
Hot at all times
Iat sig
Ig1
J106
J300
J331
Lo ref
Maf sig
Mil ctl
Nca
P/n sig
Pnk
Primary fuel pump & sender assembly (inside fuel tank)
Pwtn rly ctl
Rear fuel pump & sender assembly (6.0l (vin k)) (in rear fuel tank)
Secondary fuel pump (fp) relay (6.0l (vin k)) (left side of engine compt)
Starting/ charging system
Strt rly ctl
Tan
Transmissions system
Underhood fuse block (left side of engine compt)
Vss
Vss high sig
Vss lo sig

5.3L VIN 0, Engine Performance Wiring Diagram (2 of 4) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 0, Engine Performance Wiring Diagram (2 of 4) for GMC Sierra HD 2008 2500:

(front of engine) (6.0l (vin k)) camshaft actuator solenoid
(not used)
Accelerator pedal position (app) sensor (above accelerator pedal)
Ecm- batt fuse 12 10a
Ecm- ign fuse 56 15a
Ecm/throt cont fuse 5 15a
Eng fuse 4 15a
Fuel injectors (top of left cylinder bank)
Fuel injectors (top of right cylinder bank)
G103 (on front of right cylinder head)
Hot at all times
Hot in run or start
Iat
Inj-a fuse 24 20a
Inj-b fuse 13 20a
J106
Maf
Mass air flow (maf)/intake air temperature (iat) sensor (right front of engine compt)
O2-b snsr fuse 8 10a
Pnk
Pnk a
Pnk b
Pwr/ trn relay
Tan
Tan b
Tan e
Tcm- batt fuse 14 15a
To o2-a snsr fuse 18 (diagram 3 of 4)
Underhood fuse block (left side of engine compt)

5.3L VIN 0, Engine Performance Wiring Diagram (3 of 4) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 0, Engine Performance Wiring Diagram (3 of 4) for GMC Sierra HD 2008 2500:

(lower left side of dash) left i/p junction block
(on front of right cylinder head)
(on right side of engine oil pan) engine oil level switch
(upper left corner of dash)
(w/ steering wheel heater) j220
Aux hvac- ign fuse 48 1oa
Brake fluid level switch (on master cylinder)
Camshaft position (cmp) sensor (front of engine, above crank pulley)
Computer data lines system
Crankshaft position (ckp) sensor (right rear of engine)
Engine coolant temperature (ect) sensor (on top of engine)
Engine oil pressure (eop) sensor (top rear of engine)
Engine oil pressure ind
From inj-b fuse 13 (diagram 2 of 4)
G103
G201
Gnd
Heated oxygen sensor (ho2s) bank 1 sensor 1 (upstream of left catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 1 (upstream of right catalytic converter)
Hot at all times
Hot in run or start
Ign
Instrument panel cluster (ipc)
Ipc fuse 46 10a
J106
Knock sensor 1 (lower left side of engine)
Knock sensor 2 (lower right side of engine)
Lo bus
Logic
Malfunction indicator lamp
Manifold absolute pressure (map) sensor (on top of intake manifold)
Nca
O2-a snsr fuse 18 10a
Pnk
Tan
Underhood fuse block (left side of engine compt)

5.3L VIN 0, Engine Performance Wiring Diagram (4 of 4) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 0, Engine Performance Wiring Diagram (4 of 4) for GMC Sierra HD 2008 2500:

(below intake manifold)
(in ignition coil jumper harness, 5 cm from x111 breakout)
(on intake manifold) evaporative emission (evap) canister purge solenoid valve
(upper left side of engine)
(upper right side of engine)
5v ref1
5v ref2
A pnk
Cam sol ctl
Chg ind sig
Ckp sig
Cmp sig
Ctrl
Cyl off ctl 1
Cyl off ctl 2
Cyl off ctl 3
Cyl off ctl 4
Cylinder shutoff solenoid 1, cyl 1
Cylinder shutoff solenoid 2, cyl 4
Cylinder shutoff solenoid 3, cyl 6
Cylinder shutoff solenoid 4, cyl 7
E pnk
Ect sig
Engine control module (ecm) (left front of engine compt, near fan shroud)
Eop sig
G102 (on lower left front of engine)
Gen fdc sig
Gnd
Ho2s hi b1s1
Ho2s hi b2s1
Ho2s ht b1s1
Ho2s ht b2s1
Ho2s lo b1s1
Ho2s lo b2s1
Ic 1 ctl
Ic 2 ctl
Ic 3 ctl
Ic 4 ctl
Ic 5 ctl
Ic 6 ctl
Ic 7 ctl
Ic 8 ctl
Ign
Ignition coils
Inj 1 ctl
Inj 2 ctl
Inj 3 ctl
Inj 4 ctl
Inj 5 ctl
Inj 6 ctl
Inj 7 ctl
Inj 8 ctl
J107
J108
J109
J110
J111
J112
Ks1 sig
Ks2 sig
Lo ref
Map sig
Nca
Nca nca
Oil lvl sw sig
Pnk
Pnk d
Red c
Ref lo
Sol ctrl
Spark plug
Spark spark plug plug
Starting/ charging system
Starting/charging system
Tac mot ctl 1
Tac mot ctl 2
Tan
Throttle body
Tp sens1 sig
Tp sens2 sig
Valve lifter oil manifold (vlom) assembly

5.3L VIN 3

5.3L VIN 3, Engine Performance Wiring Diagram (1 of 4) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 3, Engine Performance Wiring Diagram (1 of 4) for GMC Sierra HD 2008 2500:

(below driver's door, on body mount)
(below driver's door, on body mount) g300
(in chassis harness)
(on fuel pump & sender assembly)
(on lower left front of engine) g102
(or 821)
4wd lo sig
5v ref(ac)
5v ref1
5v ref2
A/c cl ctl
A/c pres sig
Acc ser data
Air conditioning system
Anti-lock brakes system cooling fans system
App1 sig
App2 sig
Axl sw sig
Brk sw sig
Cfan hi ctl
Cfan lo ctl
Computer data lines system
Cooling fans system
Engine control module (ecm) (left front of engine compt, near fan shroud)
Evap vent
Evaporative emissions (evap) canister vent solenoid valve (under rear of vehicle)
Exterior lights system
Ftp sig
Fuel ctl
Fuel ctl-sec
Fuel lvl-pri
Fuel lvl-sec
Fuel pmp relay
Fuel pump fuse 20 20a
Fuel tank pressure (ftp) sensor
G103 (on front of right cylinder head)
G300
Gmlan (+)
Gmlan (-)
Gnd
Heated oxygen sensor (ho2s) bank 1 sensor 2 (downstream of left catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 2 (downstream of right catalytic converter)
Ho2s hi b1s2
Ho2s hi b2s2
Ho2s ht b1s2
Ho2s ht b2s2
Ho2s lo b1s2
Ho2s lo b2s2
Hot at all times
Iat sig
Ig1
J106
J300
J331
Lo ref
Maf sig
Mil ctl
Nca
P/n sig
Pnk
Primary fuel pump & sender assembly (inside fuel tank)
Pwtn rly ctl
Rear fuel pump & sender assembly (6.0l (vin k)) (in rear fuel tank)
Secondary fuel pump (fp) relay (6.0l (vin k)) (left side of engine compt)
Starting/ charging system
Strt rly ctl
Tan
Transmissions system
Underhood fuse block (left side of engine compt)
Vss
Vss high sig
Vss lo sig

5.3L VIN 3, Engine Performance Wiring Diagram (2 of 4) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 3, Engine Performance Wiring Diagram (2 of 4) for GMC Sierra HD 2008 2500:

(front of engine) (6.0l (vin k)) camshaft actuator solenoid
(not used)
Accelerator pedal position (app) sensor (above accelerator pedal)
Ecm- batt fuse 12 10a
Ecm- ign fuse 56 15a
Ecm/throt cont fuse 5 15a
Eng fuse 4 15a
Fuel injectors (top of left cylinder bank)
Fuel injectors (top of right cylinder bank)
G103 (on front of right cylinder head)
Hot at all times
Hot in run or start
Iat
Inj-a fuse 24 20a
Inj-b fuse 13 20a
J106
Maf
Mass air flow (maf)/intake air temperature (iat) sensor (right front of engine compt)
O2-b snsr fuse 8 10a
Pnk
Pnk a
Pnk b
Pwr/ trn relay
Tan
Tan b
Tan e
Tcm- batt fuse 14 15a
To o2-a snsr fuse 18 (diagram 3 of 4)
Underhood fuse block (left side of engine compt)

5.3L VIN 3, Engine Performance Wiring Diagram (3 of 4) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 3, Engine Performance Wiring Diagram (3 of 4) for GMC Sierra HD 2008 2500:

(lower left side of dash) left i/p junction block
(on front of right cylinder head)
(on right side of engine oil pan) engine oil level switch
(upper left corner of dash)
(w/ steering wheel heater) j220
Aux hvac- ign fuse 48 1oa
Brake fluid level switch (on master cylinder)
Camshaft position (cmp) sensor (front of engine, above crank pulley)
Computer data lines system
Crankshaft position (ckp) sensor (right rear of engine)
Engine coolant temperature (ect) sensor (on top of engine)
Engine oil pressure (eop) sensor (top rear of engine)
Engine oil pressure ind
From inj-b fuse 13 (diagram 2 of 4)
G103
G201
Gnd
Heated oxygen sensor (ho2s) bank 1 sensor 1 (upstream of left catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 1 (upstream of right catalytic converter)
Hot at all times
Hot in run or start
Ign
Instrument panel cluster (ipc)
Ipc fuse 46 10a
J106
Knock sensor 1 (lower left side of engine)
Knock sensor 2 (lower right side of engine)
Lo bus
Logic
Malfunction indicator lamp
Manifold absolute pressure (map) sensor (on top of intake manifold)
Nca
O2-a snsr fuse 18 10a
Pnk
Tan
Underhood fuse block (left side of engine compt)

5.3L VIN 3, Engine Performance Wiring Diagram (4 of 4) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 3, Engine Performance Wiring Diagram (4 of 4) for GMC Sierra HD 2008 2500:

(below intake manifold)
(in ignition coil jumper harness, 5 cm from x111 breakout)
(on intake manifold) evaporative emission (evap) canister purge solenoid valve
(upper left side of engine)
(upper right side of engine)
5v ref1
5v ref2
A pnk
Cam sol ctl
Chg ind sig
Ckp sig
Cmp sig
Ctrl
Cyl off ctl 1
Cyl off ctl 2
Cyl off ctl 3
Cyl off ctl 4
Cylinder shutoff solenoid 1, cyl 1
Cylinder shutoff solenoid 2, cyl 4
Cylinder shutoff solenoid 3, cyl 6
Cylinder shutoff solenoid 4, cyl 7
E pnk
Ect sig
Engine control module (ecm) (left front of engine compt, near fan shroud)
Eop sig
G102 (on lower left front of engine)
Gen fdc sig
Gnd
Ho2s hi b1s1
Ho2s hi b2s1
Ho2s ht b1s1
Ho2s ht b2s1
Ho2s lo b1s1
Ho2s lo b2s1
Ic 1 ctl
Ic 2 ctl
Ic 3 ctl
Ic 4 ctl
Ic 5 ctl
Ic 6 ctl
Ic 7 ctl
Ic 8 ctl
Ign
Ignition coils
Inj 1 ctl
Inj 2 ctl
Inj 3 ctl
Inj 4 ctl
Inj 5 ctl
Inj 6 ctl
Inj 7 ctl
Inj 8 ctl
J107
J108
J109
J110
J111
J112
Ks1 sig
Ks2 sig
Lo ref
Map sig
Nca
Nca nca
Oil lvl sw sig
Pnk
Pnk d
Red c
Ref lo
Sol ctrl
Spark plug
Spark spark plug plug
Starting/ charging system
Starting/charging system
Tac mot ctl 1
Tac mot ctl 2
Tan
Throttle body
Tp sens1 sig
Tp sens2 sig
Valve lifter oil manifold (vlom) assembly

5.3L VIN J

5.3L VIN J, Engine Performance Wiring Diagram (1 of 5) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN J, Engine Performance Wiring Diagram (1 of 5) for GMC Sierra HD 2008 2500:

(in chassis
(on fuel pump & sender assembly)
(or 821)
4wd lo sig
5v ref(ac)
5v ref1
5v ref2
A/c cl ctl
A/c pres sig
Acc ser data
Air conditioning system
Anti-lock brakes system cooling fans system
App1 sig
App2 sig
Axl sw sig
Brk sw sig
Cfan hi ctl
Cfan lo ctl
Computer data lines system
Cooling fans system
Engine control module (ecm) (left front of engine compt, near fan shroud)
Evap vent
Evaporative emissions (evap) canister vent solenoid valve (under rear of vehicle)
Exterior lights system
Front fuel pump & sender assembly (in front fuel tank)
Ftp sig
Fuel ctl
Fuel lvl-pri
Fuel tank pressure (ftp) sensor
G103 (on front of right cylinder head)
Gmlan (+)
Gmlan (-)
Gnd
Harness)
Heated oxygen sensor (ho2s) bank 1 sensor 2 (downstream of left catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 2 (downstream of right catalytic converter)
Ho2s hi b1s2
Ho2s hi b2s2
Ho2s ht b1s2
Ho2s ht b2s2
Ho2s lo b1s2
Ho2s lo b2s2
Iat sig
Ig1
J106
J331
Lo ref
Maf sig
Mil ctl
Nca
P/n sig
Pnk
Pwtn rly ctl
Starting/ charging system
Strt rly ctl
Tan
Tos sig or
Transmissions system
Vss
Vss hi sig
Vss lo sig

5.3L VIN J, Engine Performance Wiring Diagram (2 of 5) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN J, Engine Performance Wiring Diagram (2 of 5) for GMC Sierra HD 2008 2500:

5v ref
Computer data lines system
Ecm- ign fuse 56 15a
Fscm fuse 21 20a
Fscm shield
Fuel ctl
Fuel line pressure sensor (under left side of vehicle)
Fuel pres
Fuel system control module (fscm) (under rear of vehicle)
G300 (below driver's door, on body mount)
Gmlan (+)
Gmlan (-)
Gnd
Hot at all times
Hot in run or start
Ig1
J300
Lo ref
Pnk
Pump (+)
Ser data en
Tan
Underhood fuse block (left side of engine compt)

5.3L VIN J, Engine Performance Wiring Diagram (3 of 5) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN J, Engine Performance Wiring Diagram (3 of 5) for GMC Sierra HD 2008 2500:

(front of engine) (6.0l & 6.2l) camshaft actuator solenoid
(not used)
Accelerator pedal position (app) sensor (above accelerator pedal)
Ecm- batt fuse 12 10a
Ecm/throt cont fuse 5 15a
Eng fuse 4 15a
Fuel injectors (top of left cylinder bank)
Fuel injectors (top of right cylinder bank)
G103 (on front of right cylinder head)
Hot at all times
Iat
Inj-a fuse 24 20a
Inj-b fuse 13 20a
J106
Maf
Mass air flow (maf)/intake air temperature (iat) sensor (right front of engine compt)
O2-b snsr fuse 8 10a
Pnk
Pnk a
Pnk b
Pwr/ trn relay
Tan
Tan b
Tan e
Tcm- batt fuse 14 10a
To o2-a snsr fuse (diagram 4 of 5)
Underhood fuse block (left side of engine compt)

5.3L VIN J, Engine Performance Wiring Diagram (4 of 5) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN J, Engine Performance Wiring Diagram (4 of 5) for GMC Sierra HD 2008 2500:

(lower left side of dash) left i/p junction block
(on front of right cylinder head)
(on right side of engine oil pan) engine oil level switch
(upper left corner of dash)
(w/ steering wheel heater) j220
Aux hvac- ign fuse 48 1oa
Brake fluid level switch (on master cylinder)
Camshaft position sensor (front of engine, above crank pulley)
Computer data lines system
Crankshaft position sensor (right rear of engine)
Engine coolant temperature (ect) sensor (on top of engine)
Engine oil pressure (eop) sensor (top rear of engine)
Engine oil pressure ind
From inj-b fuse (diagram 3 of 5)
G103
G201
Gnd
Heated oxygen sensor (ho2s) bank 1 sensor 1 (upstream of left catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 1 (upstream of right catalytic converter)
Hot at all times
Hot in run or start
Ign
Ign 1
Instrument panel cluster (ipc)
Ipc fuse 46 10a
J106
Knock sensor 1 (lower left side of engine)
Knock sensor 2 (lower right side of engine)
Lo bus
Logic
Malfunction indicator lamp
Manifold absolute pressure (map) sensor (on top of intake manifold)
Nca
O2-a snsr fuse 18 10a
Pnk
Tan
Underhood fuse block (left side of engine compt)

5.3L VIN J, Engine Performance Wiring Diagram (5 of 5) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN J, Engine Performance Wiring Diagram (5 of 5) for GMC Sierra HD 2008 2500:

(below intake manifold) (except 4.8l) valve lifter oil manifold (vlom) assembly
(in ignition coil jumper harness, 5 cm from x111 breakout)
(on intake manifold) evaporative emission (evap) canister purge solenoid valve
(upper left side of engine)
(upper right side of engine)
5v ref1
5v ref2
A pnk
Cam sol ctl
Chg ind sig
Ckp sig
Cmp sig
Ctrl
Cyl off ctl 1
Cyl off ctl 2
Cyl off ctl 3
Cyl off ctl 4
Cylinder shutoff solenoid 1, cyl 1
Cylinder shutoff solenoid 2, cyl 4
Cylinder shutoff solenoid 3, cyl 6
Cylinder shutoff solenoid 4, cyl 7
E pnk
Ect sig
Engine control module (ecm) (left front of engine compt, near fan shroud)
Eop sig
G102 (on lower left front of engine)
Gen fdc sig
Gnd
Ho2s hi b1s1
Ho2s hi b2s1
Ho2s ht b1s1
Ho2s ht b2s1
Ho2s lo b1s1
Ho2s lo b2s1
Ic 1 ctl
Ic 2 ctl
Ic 3 ctl
Ic 4 ctl
Ic 5 ctl
Ic 6 ctl
Ic 7 ctl
Ic 8 ctl
Ign
Ignition coils
Inj 1 ctl
Inj 2 ctl
Inj 3 ctl
Inj 4 ctl
Inj 5 ctl
Inj 6 ctl
Inj 7 ctl
Inj 8 ctl
J107
J108
J109
J110
J111
J112
Ks1 sig
Ks2 sig
Lo ref
Map sig
Nca
Nca nca
Oil lvl sw sig
Pnk
Pnk d
Red c
Ref lo
Sol ctrl
Spark plug
Spark spark plug plug
Starting/ charging system
Starting/charging system
Tac mot ctl 1
Tac mot ctl 2
Tan
Throttle body
Tp sens1 sig
Tp sens2 sig

5.3L VIN M

5.3L VIN M, Engine Performance Wiring Diagram (1 of 5) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN M, Engine Performance Wiring Diagram (1 of 5) for GMC Sierra HD 2008 2500:

(in chassis
(on fuel pump & sender assembly)
(or 821)
4wd lo sig
5v ref(ac)
5v ref1
5v ref2
A/c cl ctl
A/c pres sig
Acc ser data
Air conditioning system
Anti-lock brakes system cooling fans system
App1 sig
App2 sig
Axl sw sig
Brk sw sig
Cfan hi ctl
Cfan lo ctl
Computer data lines system
Cooling fans system
Engine control module (ecm) (left front of engine compt, near fan shroud)
Evap vent
Evaporative emissions (evap) canister vent solenoid valve (under rear of vehicle)
Exterior lights system
Front fuel pump & sender assembly (in front fuel tank)
Ftp sig
Fuel ctl
Fuel lvl-pri
Fuel tank pressure (ftp) sensor
G103 (on front of right cylinder head)
Gmlan (+)
Gmlan (-)
Gnd
Harness)
Heated oxygen sensor (ho2s) bank 1 sensor 2 (downstream of left catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 2 (downstream of right catalytic converter)
Ho2s hi b1s2
Ho2s hi b2s2
Ho2s ht b1s2
Ho2s ht b2s2
Ho2s lo b1s2
Ho2s lo b2s2
Iat sig
Ig1
J106
J331
Lo ref
Maf sig
Mil ctl
Nca
P/n sig
Pnk
Pwtn rly ctl
Starting/ charging system
Strt rly ctl
Tan
Tos sig or
Transmissions system
Vss
Vss hi sig
Vss lo sig

5.3L VIN M, Engine Performance Wiring Diagram (2 of 5) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN M, Engine Performance Wiring Diagram (2 of 5) for GMC Sierra HD 2008 2500:

5v ref
Computer data lines system
Ecm- ign fuse 56 15a
Fscm fuse 21 20a
Fscm shield
Fuel ctl
Fuel line pressure sensor (under left side of vehicle)
Fuel pres
Fuel system control module (fscm) (under rear of vehicle)
G300 (below driver's door, on body mount)
Gmlan (+)
Gmlan (-)
Gnd
Hot at all times
Hot in run or start
Ig1
J300
Lo ref
Pnk
Pump (+)
Ser data en
Tan
Underhood fuse block (left side of engine compt)

5.3L VIN M, Engine Performance Wiring Diagram (3 of 5) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN M, Engine Performance Wiring Diagram (3 of 5) for GMC Sierra HD 2008 2500:

(front of engine) (6.0l & 6.2l) camshaft actuator solenoid
(not used)
Accelerator pedal position (app) sensor (above accelerator pedal)
Ecm- batt fuse 12 10a
Ecm/throt cont fuse 5 15a
Eng fuse 4 15a
Fuel injectors (top of left cylinder bank)
Fuel injectors (top of right cylinder bank)
G103 (on front of right cylinder head)
Hot at all times
Iat
Inj-a fuse 24 20a
Inj-b fuse 13 20a
J106
Maf
Mass air flow (maf)/intake air temperature (iat) sensor (right front of engine compt)
O2-b snsr fuse 8 10a
Pnk
Pnk a
Pnk b
Pwr/ trn relay
Tan
Tan b
Tan e
Tcm- batt fuse 14 10a
To o2-a snsr fuse (diagram 4 of 5)
Underhood fuse block (left side of engine compt)

5.3L VIN M, Engine Performance Wiring Diagram (4 of 5) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN M, Engine Performance Wiring Diagram (4 of 5) for GMC Sierra HD 2008 2500:

(lower left side of dash) left i/p junction block
(on front of right cylinder head)
(on right side of engine oil pan) engine oil level switch
(upper left corner of dash)
(w/ steering wheel heater) j220
Aux hvac- ign fuse 48 1oa
Brake fluid level switch (on master cylinder)
Camshaft position sensor (front of engine, above crank pulley)
Computer data lines system
Crankshaft position sensor (right rear of engine)
Engine coolant temperature (ect) sensor (on top of engine)
Engine oil pressure (eop) sensor (top rear of engine)
Engine oil pressure ind
From inj-b fuse (diagram 3 of 5)
G103
G201
Gnd
Heated oxygen sensor (ho2s) bank 1 sensor 1 (upstream of left catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 1 (upstream of right catalytic converter)
Hot at all times
Hot in run or start
Ign
Ign 1
Instrument panel cluster (ipc)
Ipc fuse 46 10a
J106
Knock sensor 1 (lower left side of engine)
Knock sensor 2 (lower right side of engine)
Lo bus
Logic
Malfunction indicator lamp
Manifold absolute pressure (map) sensor (on top of intake manifold)
Nca
O2-a snsr fuse 18 10a
Pnk
Tan
Underhood fuse block (left side of engine compt)

5.3L VIN M, Engine Performance Wiring Diagram (5 of 5) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN M, Engine Performance Wiring Diagram (5 of 5) for GMC Sierra HD 2008 2500:

(below intake manifold) (except 4.8l) valve lifter oil manifold (vlom) assembly
(in ignition coil jumper harness, 5 cm from x111 breakout)
(on intake manifold) evaporative emission (evap) canister purge solenoid valve
(upper left side of engine)
(upper right side of engine)
5v ref1
5v ref2
A pnk
Cam sol ctl
Chg ind sig
Ckp sig
Cmp sig
Ctrl
Cyl off ctl 1
Cyl off ctl 2
Cyl off ctl 3
Cyl off ctl 4
Cylinder shutoff solenoid 1, cyl 1
Cylinder shutoff solenoid 2, cyl 4
Cylinder shutoff solenoid 3, cyl 6
Cylinder shutoff solenoid 4, cyl 7
E pnk
Ect sig
Engine control module (ecm) (left front of engine compt, near fan shroud)
Eop sig
G102 (on lower left front of engine)
Gen fdc sig
Gnd
Ho2s hi b1s1
Ho2s hi b2s1
Ho2s ht b1s1
Ho2s ht b2s1
Ho2s lo b1s1
Ho2s lo b2s1
Ic 1 ctl
Ic 2 ctl
Ic 3 ctl
Ic 4 ctl
Ic 5 ctl
Ic 6 ctl
Ic 7 ctl
Ic 8 ctl
Ign
Ignition coils
Inj 1 ctl
Inj 2 ctl
Inj 3 ctl
Inj 4 ctl
Inj 5 ctl
Inj 6 ctl
Inj 7 ctl
Inj 8 ctl
J107
J108
J109
J110
J111
J112
Ks1 sig
Ks2 sig
Lo ref
Map sig
Nca
Nca nca
Oil lvl sw sig
Pnk
Pnk d
Red c
Ref lo
Sol ctrl
Spark plug
Spark spark plug plug
Starting/ charging system
Starting/charging system
Tac mot ctl 1
Tac mot ctl 2
Tan
Throttle body
Tp sens1 sig
Tp sens2 sig

6.0L VIN Y

6.0L VIN Y, Engine Performance Wiring Diagram (1 of 5) for GMC Sierra HD 2008 2500

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List of elements for 6.0L VIN Y, Engine Performance Wiring Diagram (1 of 5) for GMC Sierra HD 2008 2500:

(in chassis
(on fuel pump & sender assembly)
(or 821)
4wd lo sig
5v ref(ac)
5v ref1
5v ref2
A/c cl ctl
A/c pres sig
Acc ser data
Air conditioning system
Anti-lock brakes system cooling fans system
App1 sig
App2 sig
Axl sw sig
Brk sw sig
Cfan hi ctl
Cfan lo ctl
Computer data lines system
Cooling fans system
Engine control module (ecm) (left front of engine compt, near fan shroud)
Evap vent
Evaporative emissions (evap) canister vent solenoid valve (under rear of vehicle)
Exterior lights system
Front fuel pump & sender assembly (in front fuel tank)
Ftp sig
Fuel ctl
Fuel lvl-pri
Fuel tank pressure (ftp) sensor
G103 (on front of right cylinder head)
Gmlan (+)
Gmlan (-)
Gnd
Harness)
Heated oxygen sensor (ho2s) bank 1 sensor 2 (downstream of left catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 2 (downstream of right catalytic converter)
Ho2s hi b1s2
Ho2s hi b2s2
Ho2s ht b1s2
Ho2s ht b2s2
Ho2s lo b1s2
Ho2s lo b2s2
Iat sig
Ig1
J106
J331
Lo ref
Maf sig
Mil ctl
Nca
P/n sig
Pnk
Pwtn rly ctl
Starting/ charging system
Strt rly ctl
Tan
Tos sig or
Transmissions system
Vss
Vss hi sig
Vss lo sig

6.0L VIN Y, Engine Performance Wiring Diagram (2 of 5) for GMC Sierra HD 2008 2500

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List of elements for 6.0L VIN Y, Engine Performance Wiring Diagram (2 of 5) for GMC Sierra HD 2008 2500:

5v ref
Computer data lines system
Ecm- ign fuse 56 15a
Fscm fuse 21 20a
Fscm shield
Fuel ctl
Fuel line pressure sensor (under left side of vehicle)
Fuel pres
Fuel system control module (fscm) (under rear of vehicle)
G300 (below driver's door, on body mount)
Gmlan (+)
Gmlan (-)
Gnd
Hot at all times
Hot in run or start
Ig1
J300
Lo ref
Pnk
Pump (+)
Ser data en
Tan
Underhood fuse block (left side of engine compt)

6.0L VIN Y, Engine Performance Wiring Diagram (3 of 5) for GMC Sierra HD 2008 2500

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List of elements for 6.0L VIN Y, Engine Performance Wiring Diagram (3 of 5) for GMC Sierra HD 2008 2500:

(front of engine) (6.0l & 6.2l) camshaft actuator solenoid
(not used)
Accelerator pedal position (app) sensor (above accelerator pedal)
Ecm- batt fuse 12 10a
Ecm/throt cont fuse 5 15a
Eng fuse 4 15a
Fuel injectors (top of left cylinder bank)
Fuel injectors (top of right cylinder bank)
G103 (on front of right cylinder head)
Hot at all times
Iat
Inj-a fuse 24 20a
Inj-b fuse 13 20a
J106
Maf
Mass air flow (maf)/intake air temperature (iat) sensor (right front of engine compt)
O2-b snsr fuse 8 10a
Pnk
Pnk a
Pnk b
Pwr/ trn relay
Tan
Tan b
Tan e
Tcm- batt fuse 14 10a
To o2-a snsr fuse (diagram 4 of 5)
Underhood fuse block (left side of engine compt)

6.0L VIN Y, Engine Performance Wiring Diagram (4 of 5) for GMC Sierra HD 2008 2500

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List of elements for 6.0L VIN Y, Engine Performance Wiring Diagram (4 of 5) for GMC Sierra HD 2008 2500:

(lower left side of dash) left i/p junction block
(on front of right cylinder head)
(on right side of engine oil pan) engine oil level switch
(upper left corner of dash)
(w/ steering wheel heater) j220
Aux hvac- ign fuse 48 1oa
Brake fluid level switch (on master cylinder)
Camshaft position sensor (front of engine, above crank pulley)
Computer data lines system
Crankshaft position sensor (right rear of engine)
Engine coolant temperature (ect) sensor (on top of engine)
Engine oil pressure (eop) sensor (top rear of engine)
Engine oil pressure ind
From inj-b fuse (diagram 3 of 5)
G103
G201
Gnd
Heated oxygen sensor (ho2s) bank 1 sensor 1 (upstream of left catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 1 (upstream of right catalytic converter)
Hot at all times
Hot in run or start
Ign
Ign 1
Instrument panel cluster (ipc)
Ipc fuse 46 10a
J106
Knock sensor 1 (lower left side of engine)
Knock sensor 2 (lower right side of engine)
Lo bus
Logic
Malfunction indicator lamp
Manifold absolute pressure (map) sensor (on top of intake manifold)
Nca
O2-a snsr fuse 18 10a
Pnk
Tan
Underhood fuse block (left side of engine compt)

6.0L VIN Y, Engine Performance Wiring Diagram (5 of 5) for GMC Sierra HD 2008 2500

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List of elements for 6.0L VIN Y, Engine Performance Wiring Diagram (5 of 5) for GMC Sierra HD 2008 2500:

(below intake manifold) (except 4.8l) valve lifter oil manifold (vlom) assembly
(in ignition coil jumper harness, 5 cm from x111 breakout)
(on intake manifold) evaporative emission (evap) canister purge solenoid valve
(upper left side of engine)
(upper right side of engine)
5v ref1
5v ref2
A pnk
Cam sol ctl
Chg ind sig
Ckp sig
Cmp sig
Ctrl
Cyl off ctl 1
Cyl off ctl 2
Cyl off ctl 3
Cyl off ctl 4
Cylinder shutoff solenoid 1, cyl 1
Cylinder shutoff solenoid 2, cyl 4
Cylinder shutoff solenoid 3, cyl 6
Cylinder shutoff solenoid 4, cyl 7
E pnk
Ect sig
Engine control module (ecm) (left front of engine compt, near fan shroud)
Eop sig
G102 (on lower left front of engine)
Gen fdc sig
Gnd
Ho2s hi b1s1
Ho2s hi b2s1
Ho2s ht b1s1
Ho2s ht b2s1
Ho2s lo b1s1
Ho2s lo b2s1
Ic 1 ctl
Ic 2 ctl
Ic 3 ctl
Ic 4 ctl
Ic 5 ctl
Ic 6 ctl
Ic 7 ctl
Ic 8 ctl
Ign
Ignition coils
Inj 1 ctl
Inj 2 ctl
Inj 3 ctl
Inj 4 ctl
Inj 5 ctl
Inj 6 ctl
Inj 7 ctl
Inj 8 ctl
J107
J108
J109
J110
J111
J112
Ks1 sig
Ks2 sig
Lo ref
Map sig
Nca
Nca nca
Oil lvl sw sig
Pnk
Pnk d
Red c
Ref lo
Sol ctrl
Spark plug
Spark spark plug plug
Starting/ charging system
Starting/charging system
Tac mot ctl 1
Tac mot ctl 2
Tan
Throttle body
Tp sens1 sig
Tp sens2 sig

6.2L VIN 8

6.2L VIN 8, Engine Performance Wiring Diagram (1 of 5) for GMC Sierra HD 2008 2500

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List of elements for 6.2L VIN 8, Engine Performance Wiring Diagram (1 of 5) for GMC Sierra HD 2008 2500:

(in chassis
(on fuel pump & sender assembly)
(or 821)
4wd lo sig
5v ref(ac)
5v ref1
5v ref2
A/c cl ctl
A/c pres sig
Acc ser data
Air conditioning system
Anti-lock brakes system cooling fans system
App1 sig
App2 sig
Axl sw sig
Brk sw sig
Cfan hi ctl
Cfan lo ctl
Computer data lines system
Cooling fans system
Engine control module (ecm) (left front of engine compt, near fan shroud)
Evap vent
Evaporative emissions (evap) canister vent solenoid valve (under rear of vehicle)
Exterior lights system
Front fuel pump & sender assembly (in front fuel tank)
Ftp sig
Fuel ctl
Fuel lvl-pri
Fuel tank pressure (ftp) sensor
G103 (on front of right cylinder head)
Gmlan (+)
Gmlan (-)
Gnd
Harness)
Heated oxygen sensor (ho2s) bank 1 sensor 2 (downstream of left catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 2 (downstream of right catalytic converter)
Ho2s hi b1s2
Ho2s hi b2s2
Ho2s ht b1s2
Ho2s ht b2s2
Ho2s lo b1s2
Ho2s lo b2s2
Iat sig
Ig1
J106
J331
Lo ref
Maf sig
Mil ctl
Nca
P/n sig
Pnk
Pwtn rly ctl
Starting/ charging system
Strt rly ctl
Tan
Tos sig or
Transmissions system
Vss
Vss hi sig
Vss lo sig

6.2L VIN 8, Engine Performance Wiring Diagram (2 of 5) for GMC Sierra HD 2008 2500

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List of elements for 6.2L VIN 8, Engine Performance Wiring Diagram (2 of 5) for GMC Sierra HD 2008 2500:

5v ref
Computer data lines system
Ecm- ign fuse 56 15a
Fscm fuse 21 20a
Fscm shield
Fuel ctl
Fuel line pressure sensor (under left side of vehicle)
Fuel pres
Fuel system control module (fscm) (under rear of vehicle)
G300 (below driver's door, on body mount)
Gmlan (+)
Gmlan (-)
Gnd
Hot at all times
Hot in run or start
Ig1
J300
Lo ref
Pnk
Pump (+)
Ser data en
Tan
Underhood fuse block (left side of engine compt)

6.2L VIN 8, Engine Performance Wiring Diagram (3 of 5) for GMC Sierra HD 2008 2500

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List of elements for 6.2L VIN 8, Engine Performance Wiring Diagram (3 of 5) for GMC Sierra HD 2008 2500:

(front of engine) (6.0l & 6.2l) camshaft actuator solenoid
(not used)
Accelerator pedal position (app) sensor (above accelerator pedal)
Ecm- batt fuse 12 10a
Ecm/throt cont fuse 5 15a
Eng fuse 4 15a
Fuel injectors (top of left cylinder bank)
Fuel injectors (top of right cylinder bank)
G103 (on front of right cylinder head)
Hot at all times
Iat
Inj-a fuse 24 20a
Inj-b fuse 13 20a
J106
Maf
Mass air flow (maf)/intake air temperature (iat) sensor (right front of engine compt)
O2-b snsr fuse 8 10a
Pnk
Pnk a
Pnk b
Pwr/ trn relay
Tan
Tan b
Tan e
Tcm- batt fuse 14 10a
To o2-a snsr fuse (diagram 4 of 5)
Underhood fuse block (left side of engine compt)

6.2L VIN 8, Engine Performance Wiring Diagram (4 of 5) for GMC Sierra HD 2008 2500

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List of elements for 6.2L VIN 8, Engine Performance Wiring Diagram (4 of 5) for GMC Sierra HD 2008 2500:

(lower left side of dash) left i/p junction block
(on front of right cylinder head)
(on right side of engine oil pan) engine oil level switch
(upper left corner of dash)
(w/ steering wheel heater) j220
Aux hvac- ign fuse 48 1oa
Brake fluid level switch (on master cylinder)
Camshaft position sensor (front of engine, above crank pulley)
Computer data lines system
Crankshaft position sensor (right rear of engine)
Engine coolant temperature (ect) sensor (on top of engine)
Engine oil pressure (eop) sensor (top rear of engine)
Engine oil pressure ind
From inj-b fuse (diagram 3 of 5)
G103
G201
Gnd
Heated oxygen sensor (ho2s) bank 1 sensor 1 (upstream of left catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 1 (upstream of right catalytic converter)
Hot at all times
Hot in run or start
Ign
Ign 1
Instrument panel cluster (ipc)
Ipc fuse 46 10a
J106
Knock sensor 1 (lower left side of engine)
Knock sensor 2 (lower right side of engine)
Lo bus
Logic
Malfunction indicator lamp
Manifold absolute pressure (map) sensor (on top of intake manifold)
Nca
O2-a snsr fuse 18 10a
Pnk
Tan
Underhood fuse block (left side of engine compt)

6.2L VIN 8, Engine Performance Wiring Diagram (5 of 5) for GMC Sierra HD 2008 2500

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List of elements for 6.2L VIN 8, Engine Performance Wiring Diagram (5 of 5) for GMC Sierra HD 2008 2500:

(below intake manifold) (except 4.8l) valve lifter oil manifold (vlom) assembly
(in ignition coil jumper harness, 5 cm from x111 breakout)
(on intake manifold) evaporative emission (evap) canister purge solenoid valve
(upper left side of engine)
(upper right side of engine)
5v ref1
5v ref2
A pnk
Cam sol ctl
Chg ind sig
Ckp sig
Cmp sig
Ctrl
Cyl off ctl 1
Cyl off ctl 2
Cyl off ctl 3
Cyl off ctl 4
Cylinder shutoff solenoid 1, cyl 1
Cylinder shutoff solenoid 2, cyl 4
Cylinder shutoff solenoid 3, cyl 6
Cylinder shutoff solenoid 4, cyl 7
E pnk
Ect sig
Engine control module (ecm) (left front of engine compt, near fan shroud)
Eop sig
G102 (on lower left front of engine)
Gen fdc sig
Gnd
Ho2s hi b1s1
Ho2s hi b2s1
Ho2s ht b1s1
Ho2s ht b2s1
Ho2s lo b1s1
Ho2s lo b2s1
Ic 1 ctl
Ic 2 ctl
Ic 3 ctl
Ic 4 ctl
Ic 5 ctl
Ic 6 ctl
Ic 7 ctl
Ic 8 ctl
Ign
Ignition coils
Inj 1 ctl
Inj 2 ctl
Inj 3 ctl
Inj 4 ctl
Inj 5 ctl
Inj 6 ctl
Inj 7 ctl
Inj 8 ctl
J107
J108
J109
J110
J111
J112
Ks1 sig
Ks2 sig
Lo ref
Map sig
Nca
Nca nca
Oil lvl sw sig
Pnk
Pnk d
Red c
Ref lo
Sol ctrl
Spark plug
Spark spark plug plug
Starting/ charging system
Starting/charging system
Tac mot ctl 1
Tac mot ctl 2
Tan
Throttle body
Tp sens1 sig
Tp sens2 sig

EXTERIOR LIGHTS

Backup Lamps Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Backup Lamps Wiring Diagram for GMC Sierra HD 2008 2500:

(6.6l)
(6.6l) (on front of right cylinder head)
(except 6.6l)
(in camper harness, 109.5 cm from x414 breakout) j415
(not used)
Backup alarm
Bck/up
Bck/up lamp pcb relay
Body control module (bcm) (lower left side of dash)
G103 g107 (4.3l) (top left rear of engine)
G300 (below driver's door, on body mount)
G401 (on left rear body mount)
Grd
Hot at all times
If equipped
Inside rearview mirror (isrvm)
J105
J410
Left backup lamp
Left i/p junction block (lower left side of dash)
Mjr
Nca
Rear lamps junction box (inside of left rear frame rail)
Right backup lamp
Trailer tow circuit
Trlr bck/up fuse 10 fuse 9 10a
Underhood fuse block (left side of engine compt)
Veh bck/up fuse 15 fuse 14 10a
W/ compass
X10
X11

Exterior Lamps Wiring Diagram (1 of 3) for GMC Sierra HD 2008 2500

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List of elements for Exterior Lamps Wiring Diagram (1 of 3) for GMC Sierra HD 2008 2500:

(4 speed a/t) x1
(4.3l) x1
(6 speed a/t) x1
(6.6l) x1
(except x1 4.3l & 6.6l)
(in right end of dash) right i/p junction block
(left side of dash) i/p fuse block
3a4
Auto
Body control module (bcm) (lower left side of dash)
Chevrolet
Chmsl rly
Driver door lock/window switch
Driver outside rearview mirror
Engine control module (ecm) (left front of engine compt, near fan shroud)
G101 (on lower right radiator support)
G200 (on right front corner of hvac module)
G201 (upper left corner of dash)
Gmc
Hazard switch
Head
Headlamp & panel dimmer switch
Hz sw
Hz sw l trn
Hz sw r trn
J101
J103
J201
J230
J603
Left turn
Lf trn sig
Lower right front park/ turn signal lamp
Lr stp/trn
Maj
Min
Nca
Off
Park
Park lp sig
Passenger door lock/window switch
Passenger outside rearview mirror
Power take off (pto) module (if equipped) (outside of right front chassis frame)
Prk lp rly
Rf trn sig
Right front marker lamp
Right turn
Rn/crk rly
Rr stp/trn
Tan
Tcc brk
Transmission control module (tcm) (4 speed a/t: left front of engine compt, near fan shroud)
Turn signal/ multi-function switch (on left side of steering column)
Underhood fuse block (left side of engine compt)
Upper right front park/ turn signal lamp
W/ folding mirrors
W/ manual folding
W/ power folding
W/o folding mirrors

Exterior Lamps Wiring Diagram (2 of 3) for GMC Sierra HD 2008 2500

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List of elements for Exterior Lamps Wiring Diagram (2 of 3) for GMC Sierra HD 2008 2500:

(not used)
(on lower left front of engine) (except 4.3l & 6.6l) g102
6.6l
Anti-lock brakes system
Center high mounted stop lamp (chmsl)
Chevrolet
Chmsl fuse 49 fuse 46 15a
Chmsl pcb relay
Computer data lines system
Except 6.6l
G100 (on lower left radiator support)
G103 (6.6l) (on front of right cylinder head)
G107 (4.3l) (top left rear of engine)
G200 (on right front corner of hvac module)
Gmc
Hot at all times
Instrument panel cluster (ipc)
Ipc fuse 46 fuse 43 10a
J100
J102
J105
Left front marker lamp
Left i/p junction block (lower x1 left side of dash)
Left turn ind
Logic
Lower left front park/ turn signal lamp
Lt prk fuse 26 fuse 23 15a
Maj
Min
Misc ign fuse 43 fuse 40 10a
Park lamp relay
Pnk
Right turn ind
Rt prk fuse 27 fuse 24 15a
Run/ crank relay
Serial data
Stop lamp switch (top of brake pedal assembly)
Trailer tow circuit
Trlr prk fuse 25 fuse 22 15a
Underhood fuse block (left side of engine compt)
Upper left front park/ turn signal lamp

Exterior Lamps Wiring Diagram (3 of 3) for GMC Sierra HD 2008 2500

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List of elements for Exterior Lamps Wiring Diagram (3 of 3) for GMC Sierra HD 2008 2500:

(in right end of dash) right i/p junction block
(inside of left rear frame rail) rear lamps junction box
2b2
Breakout) j418
Breakout) j419
Chevrolet
G200 (on right front corner of hvac module)
G300 (below driver's door, on body mount)
G401 (on left rear body mount)
Gmc
Grd
If equipped
J337
Left backup lamp
Left front rear fender clearance lamp
Left license lamp
Left rear marker lamp
Left rear most fender clearance lamp
Left roof marker lamp
Lower left tail/ stop & turn signal lamp
Lower right tail/ stop & turn signal lamp
Middle roof marker lamp
Mjr
Mnr
Nca
Rear lamps junction box (inside of left rear frame rail)
Rear lamps junction box (inside of left rear frame rail) x1
Right backup lamp
Right front rear fender clea- rance lamp
Right license lamp
Right rear marker lamp
Right rear most fender clea- rance lamp
Right roof marker lamp
Tailgate marker lamp
Upper left tail/ stop & turn signal lamp
Upper right tail/ stop & turn signal lamp
W/ dual wheel

Trailer Tow Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Trailer Tow Wiring Diagram for GMC Sierra HD 2008 2500:

(in camper harness, 109.5 cm from x414 breakout) j415
(in chassis harness) j422
6.6l
Anti-lock brakes system
Backup lamps circuit
Body control module (bcm) (lower left side of dash)
Except 6.6l
Exterior lights system
G200 (on right front corner of hvac module)
G401 (on left rear body mount)
Hot at all times
Hot w/ bck/up lamp relay energized
Hot w/ park lamp relay energized
J200
J410
J414 (in camper harness)
J416 (129.5 cm from x414 breakout)
J417
J420 (in camper harness, 59.5 cm from x414 breakout)
J421 (in camper harness, 205 cm from x414 breakout)
Lt trailer
Power distribution system
Rt trailer
Stud 1 fuse 68 fuse 63 40a
Stud 2 fuse 63 fuse 58 30a
Trailer brake controller solid state relay (20/30 series: left rear frame rail) (31 series: on left frame rail)
Trailer connector (w/ truck trailer wiring harness) (at rear of vehicle)
Trlr bck/up fuse 10 fuse 9 10a
Trlr lt stop/turn pcb relay
Trlr prk fuse 25 fuse 22 15a
Trlr rt stop/turn pcb relay
Trlr stop lt fuse 3 fuse 2 10a
Trlr stop rt fuse 1 fuse 4 10a
Turn sig lmp
Underhood fuse block (left side of engine compt)
W/ camper, 5th wheel trailer wiring provisions & 97 decibals electrical backup alarm
W/ trailer brake control
W/o trailer brake control

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500

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List of elements for Ground Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500:

(4.3l)
(auto 4x4, electronic 4x4, manual 4x4 & 2 speed transfer case manual shift control) front drive axle actuator
(electronic 4x4 & auto 4x4) transfer case shift control module
(except 4.3l)
(if equipped) left front fog lamp
(if equipped) right front fog lamp
(if equipped) right horn
(left side of engine compt) underhood fuse block
(manual 4x4) transfer case shift control switch
4.8l, 5.3l, 6.0l & 6.2l
A/c compressor clutch
Auxiliary battery relay (if equipped)
Auxiliary battery run relay (if equipped)
Bck/up lamp pcb relay
Chevrolet
Chmsl pcb relay
Cooling fan diode 1 (10 series)
Diesel
Diesel w/ auxiluary battery
Except 6.0l (vin k)
Fan cntrl relay
Front washer diode
Fuel pump relay
G100 (on lower left radiator support)
G101 (on lower right radiator support)
G102
G104 (front of left cylinder head)
G107 (top left rear (on lower left front of engine)
G108 (on left side of firewall)
Gas
Gmc
Hood ajar switch
Ignition coil/ module 1
Ignition coil/ module 2
Ignition coil/ module 3
Ignition coil/ module 4
Ignition coil/ module 5
Ignition coil/ module 6
Ignition coil/ module 7
Ignition coil/ module 8
J100 (in forward lamp harness, 7 cm from ambient air temperature sensor breakout)
J101 (in forward lamp harness)
J103 (in right headlamp harness)
J105 (in engine harness, 12 cm from ect sensor breakout)
J108 (in ignition coil jumper harness, between ignition coils 5 & 7)
J111 (in ignition coil jumper harness, between ignition coils 4 & 2)
J141 (in pto jumper harness)
J145 (in auxiliary battery harness)
Left battery
Left front marker lamp
Left high beam headlamp
Left horn
Left low beam headlamp
Lower left park/turn signal lamp
Lower right park/turn signal lamp
Nca
Of engine)
Rear defog relay
Right battery
Right engine cooling fan
Right front marker lamp
Right high beam headlamp
Right low beam headlamp
Run/ crnk relay
Strtr relay
To g103 (diagram 2 of 6)
Underhood fuse block (left side of engine compt)
Upper left park/turn signal lamp
Upper right park/turn signal lamp
W/ dual battery
W/ keyless entry & left cargo restraint & pto
W/ pto
Windshield washer fluid level switch
Windshield washer fluid pump
Windshield wiper motor
Wiper control pcb relay
Wiper high speed diode
Wiper low speed diode
X1 a1
X1 b
X2 n5
X3 d

Ground Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500

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List of elements for Ground Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500:

(4 speed a/t)
(4.3l)
(4.8l/5.3l/6.0l)
(6 speed a/t)
(diesel)
(if equipped)
(if equipped) garage door opener (gdo)
(if equipped) inflatable restraint passenger airbag on/off indicator
(if equipped) power take off (pto) module
(if equipped) windshield washer solvent heater
4 spd
4.3l
4.8l, 5.3l, 6.0l & 6.2l
A/c low pressure switch
A/t
Allision transmission 6 speed a/t
Automatic a/c
Bare
Body control module (bcm)
Camshaft position (cmp) sensor shield
Crankshaft position (ckp) sensor shield
Diesel
Engine control module (ecm)
Engine coolant level switch
Engine oil level (eol) switch
Except 4.3l
From j105 (diagram 1 of 6)
From right battery (diagram 1 of 6)
Fuel heater
Fuel pressure regulator shield
Fuel rail pressure (frp) sensor shield
Fuse a 30a
Fuse c 30a
G103 (on front of right cylinder head)
G105 (diesel)
G106 (diesel) (lower left side of engine)
G106 (right rear of engine)
G110 (left side of firewall)
G111 (on left side of firewall)
G403
Glow plug control module (gpcm)
Harness)
Ignition control module (icm)
J106 (in engine harness, 23 cm from map sensor breakout)
J175 (in engine red
J219 (in fuse block jumper harness)
J323 (in overhead console harness, 4 cm from x304 breakout)
Mass air flow (maf)/ intake air temperature (iat) sensors
Mobile radio fuse block (behind right side of dash)
Nca
Overhead console courtesy/ reading lamps
Park/ neutral position switch
Red
Relay a
Relay b
Roof beacon relay
Roof beacon switch
Sliding rear window switch
To j328 (diagram 3 of 6)
Transmission control module (tcm)
W/ body builder emergency lamp
W/ roof mounted lamp
W/ wrecker emergency lamp, body builder emergency lamp & roof mounted lamp
Water in fuel sensor

Ground Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500

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List of elements for Ground Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500:

(auto 4x4 & electronic 4x4) transfer case shift control switch
(automatic a/c) inside air temperature sensor
(if equipped) heated steering wheel
(if equipped) heated steering wheel control module
(if equipped) left sunshade
(if equipped) windshield outside moisture sensor
(in i/p harness, 13 cm from radio connector breakout) j203
(in i/p harness, 14 cm from left i/p junction block breakout) j200
(in steering wheel harness, 4 cm from inflatable restraint steering wheel module coil x2)
(on right front corner of hvac module) g200
2b6
3a7
4a7
Automatic a/c
Automatic transmission shift lock control solenoid
B x4
Blower motor control module
Center console accessory power outlet
Center console compartment accessory power outlet
Center high mounted stop lamp (chmsl)
Data link connector (dlc)
Driver information center (dic) switch
Electronic adjustable pedals pcb relay
Emergency lamp
Emergency vehicle roof lamp relay or wrecker relay
Extended cab/crew cab
From j323 (diagram 2 of 6)
Heater, accessory steering control & automatic cruise control
Horn switch
Hvac control module
I/p 1 accessory power outlet
I/p 2 accessory power outlet
Inflatable restraint steering wheel module coil (behind steering wheel)
Inside rearview mirror (isrvm)
J214
J215 (in steering column harness)
J324 (in sunroof harness, 3 cm from sunroof switch breakout)
J334 (in right "a" pillar harness)
Left i/p junction block (lower left side of dash)
Left roof marker lamp
Left steering wheel control switch
Manual a/c
Middle roof marker lamp
Nca
Park enable pcb realy
Passenger door lock/ window switch
Passenger outside rear view mirror
Passenger window switch
Rear dome/ reading lamps
Right i/p junction block (in right end of dash)
Right roof marker lamp
Right steering wheel control switch
Right sunshade (if equipped)
Sunroof module
Sunroof switch
Sunroof w/ roof lamp provision
Sunroof w/ roof lamp provision w/o roof marker lamp
W/ a/t & steering wheel heater
W/ accessory steering control
W/ comfort & decor level 3
W/ luxury edition
W/ manual folding mirror & heated mirror
W/ non bucket front individual seat
W/ outside temperature display & onstar
W/ roof marker lamp
W/ roof mounted lamp provisions
W/ steering wheel
W/ steering wheel heater & automatic cruise control
W/ sunroof sliding
W/o a/t & steering wheel heater
W/o non bucket front individual seat
W/o steering wheel
Wheel harness)
Wrecker emergency lamp
X1 a
X14
X2 d1
X2 k
X276 b
X277 b
X6 b

Ground Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500

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List of elements for Ground Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500:

(crew cab & w/ front individual seats) door lock/unlock pcb relay
(if equipped) driver outside rearview mirror
(if equipped) outside rearview mirror switch
(if equipped) windshield washer solvent heater
(in left front door harness) j502
(not used) g1
(w/o non backet individual seat, w/ power door lock control, heated mirror) lock pcb relay
(w/o non backet individual seat, w/ power door lock control, heated mirror) unlock pcb relay
3a3
Ambient light sensor
Ambient light/ sunload sensor
Automatic a/c
Automatic transmission shift lever
Body control module (bcm)
Brake fluid level switch
Data link connector
Driver door latch
Driver door lock switch
Driver door lock/ window switch
Driver window switch
Front door lock diode
Front door unlock diode
G201 (upper left corner of dash)
Headlamp & panel dimming switch
Hvac control module
I/p fuse block (left side of dash)
I/p multifunction switch
Instrument panel cluster (ipc)
J201 (in i/p harness, in headlamp & dimmer switch breakout)
J230
Left i/p junction block (lower left side of dash)
Manual a/c
Nca
Passenger door latch
Passenger door lock switch
Rear door lock diode
Rear door unlock diode
Right i/p junction block (in right end of dash)
Theft deterrent module
Turn signal/ multifunction switch
W/ non bucket front individual seat
W/ power door lock control
W/ power window
W/ windshield heated nozzles, rear parking assist, active brake control & power adjustable pedals
W/o non bucket front individual seat
W/o non bucket, front individual seat, w/ comfort & decor level 3
W/o power door lock control
W/o power window
Windshield wiper motor
X1 e1
X1 k2

Ground Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500

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List of elements for Ground Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500:

(back-up alarm: in camper harness, 7 cm from back-up alarm breakout) (w/ champer, 5th wheel trailer: in camper harness, 232.5 cm from x414 breakout) j410
(if equipped) back up alarm
(if equipped) rear seat audio (rsa) control
(not used)
(premium performance enhanced audio) audio amplifier
4.3l, 5.3l (vin 0), & 5.3l (vin 3)
4.3l, 5.3l (vin 0), 6.0l (vin k) & 5.3l (vin 3)
6.0l (vin k)
Chevrolet
Chime module
Diesel
Diesel, w/ 31 series & w/o rear auxiliary fuel tank
Digital radio receiver
Electronic brake control module (ebcm)
Front fuel pump & sender assembly
Front system control module (fscm)
Fuel pump
G300 (below driver's door, on body mount)
G301 (below left side of passenger's seat)
Gas
Gmc
Grd
Infrared transmitter
J300 (in chassis harness, 15 cm from g300 breakout)
J330 (in console harness, 12 cm from audio amplifier breakout)
Left i/p junction block (lower left side of dash)
Lower right tail/ stop & turn signal lamp
Nca
Radio
Rear fuel pump & sender assembly
Rear lamps junction block (inside of left rear frame rail)
Right back up lamp
Right rear marker lamp
Secondary fuel pump relay
To g401 (diagram 6 of 6)
Trailer connector
Upper right tail/ stop & turn signal lamp
Vehicle communication interface module (vcim)
Video display
W/ active brake & vaccum power brake
W/ camper, 5th wheel trailer
W/ camper, 5th wheel trailer & back up alarm
W/ dual front door mounted & 4 speaker system
W/ hydraulic power brake
W/ luxury edition
W/ performance enhanced audio
W/ radio provision
W/ rear auxiliary fuel tank
W/o camper, 5th wheel trailer & back up alarm
W/o luxury edition
W/o luxury edition & w/ rear seat entertainment package
W/o performance enhanced audio
W/o radio provision
W/o rear auxiliary fuel tank
W/o rear seat radio & luxury edition
X1 a5
X1 b
X12
X2 d

Ground Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500

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List of elements for Ground Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500:

(if equipped) driver seat adjuster switch
(if equipped) remote control door lock receiver (rcdlr)
(if equipped) sliding rear window close relay
(if equipped) sliding rear window open relay
(in body harness, 14 cm from passenger seat in-line connector breakout)
(on left rear body mount) g401
(rear parking assist) rear object sensor control module
(w/ active brake control) yaw & lateral acceleration sensor
Az3
Center console accessory power outlet
Center seat accessory power outlet
Chevrolet
Console compartment accessory power outlet
Crew cab
Crew cab/ extended cab w/ performance audio & front compartment console
Except crew cab
Except regular cab
From j410 (diagram 5 of 6)
G302 (below right side of passenger's seat)
G303 (extended cab/crew cab) (on lower left "b" pillar)
G304 (on lower right "b" pillar)
G307 (at right rear corner of passenger compt)
Gmc
Grd
Inflatable restraint passenger presence system (pps) module
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint vehicle rollover sensor
J304
J335 (in sliding rear window jumper harness)
Left back up lamp
Left front rear fender clearance lamp
Left license lamp
Left rear door latch
Left rear marker lamp
Left rear most fender clearance lamp
Left rear window switch
Lower left tail/ stop & turn signal lamp
Memory seat module (msm)
Nca
Passenger seat adjuster switch
Passenger seat lumbar switch
Rear lamps junction block (inside of left rear frame rail)
Rear window defogger grid
Regular cab
Right front rear fender clearance lamp
Right license lamp
Right rear door latch
Right rear most fender clearance lamp
Tail/ stop & turn signal lamp
Tailgate marker lamp
Trailer brake control module
Trailer brake control relay
Upper left tail/ stop & turn signal lamp
W/ abv/az3
W/ child presence detector
W/ head curtain air bag
W/ keyless entry, active brake control
W/ low tire pressure
W/ non bucket front individual seat
W/ rear defogger
W/ rear dual wheel
W/ rear parking assist, low tire pressure & remote entry
W/ trailer brake control module
W/o abv/az3
W/o child presence detector
W/o head curtain air bag
W/o keyless entry, active brake control
W/o rear defogger
W/o rear parking assist, low tire pressure & remote entry
W/o trailer brake control module
X1 e
X2 a

HEADLIGHTS

Headlights Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Headlights Wiring Diagram for GMC Sierra HD 2008 2500:

Amb lght
Ambient light sensor (manual a/c) ambient light/ sunload sensor assembly (automatic a/c) (top center of dash)
Auto
Automatic a/c
Body control module (bcm) (lower left side of dash)
Chevrolet
Computer data lines system
Diesel
Drl 2 fuse 33 fuse 30 10a
Drl fuse 31 fuse 28 10a
Drl pcb relay
Drl rly
Flash to pass
Flash to pass switch
Fog lamp fuse 26 fuse 25 15a
Fog lamp ind
Fog lamp relay
Fog lmp rly
Fog lp sw
Fog switch
G100 (on lower left radiator support)
G101 (on lower right radiator support)
G201 (upper left corner of dash)
Gas
Gmc
Gmlan serial data
Hdlp dim sw sig
Hdlp lo/hid relay
Hdlp off
Hdlp on
Head
Headlamp & panel dimmer switch
Headlamp dimmer switch
Hi beam ind
Hi beam pcb relay
Hi beam rly
Hi head- lamp lt fuse 32 fuse 29 10a
Hi head- lamp rt fuse 30 fuse 21 10a
Hot at all times
Hot w/ run/ crank relay energized
Instrument panel cluster (ipc)
Ipc fuse 46 fuse 43 10a
J100
J101
J201
J230
Left front fog lamp
Left high beam headlamp
Left i/p junction box (lower left side of dash)
Left low beam headlamp
Lo beam rly
Lo hdlp lt fuse 12 20a
Lo hdlp rt fuse 16 fuse 15 20a
Logic
Manual a/c
Off
Park
Park brake switch (on park brake pedal assembly)
Pk brake sig
Prk lmp
Right front fog lamp
Right high beam headlamp
Right low beam headlamp
Turn signal/ multi-function switch
Underhood fuse block (left side of engine compt)

HORN

Horn Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Horn Wiring Diagram for GMC Sierra HD 2008 2500:

(diesel)
(gas)
B x1
Body control module (lower left side of dash)
G100 (on lower left radiator support)
G101 (on lower right radiator support)
G200 (on right front corner of hvac module)
Horn fuse 29 fuse 26 15a
Horn pcb relay
Horn relay control
Horn switch
Hot at all times
Inflatable restraint steering wheel module coil (behind steering wheel)
J x2
J100
J101
Left horn (lower left front of vehicle)
Right horn (lower right front of vehicle)
Tan
Underhood fuse block (left side of engine compt)
W/ high note dual horn & comfort, decor level 3 convenience package
X4 g1

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram (1 of 2) for GMC Sierra HD 2008 2500

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List of elements for Instrument Cluster Wiring Diagram (1 of 2) for GMC Sierra HD 2008 2500:

(on lower left front of engine) (except 4.3l & 6.6l) g102
(top left rear of engine) (4.3l) g107
4wd ind
6.6l
Abs ind
Air bag ind
Aux hvac-ign fuse 48 fuse 45 10a
Body control module (bcm) (lower left side of dash)
Brake fluid level switch (on master cylinder)
Brake ind
Brk fld sig
Charge ind
Computer data lines system
Coolant temperature gauge
Cruise ind
Dic sw sig
Driver information center (dic)
Engine controls system
Except 6.6l
Fog lamp ind
Fuel gauge
G103 (6.6l) (on front of right cylinder head)
G201 (upper left corner of dash)
Gmlan serial
Gnd
High beam ind
Hot at all times
Ign
Ign 1
Instrument panel cluster
Interior lights system
Ipc fuse 46 fuse 43 10a
J105
J220 (w/ steering wheel heater)
Led cntrl
Left i/p junction block (lower left side of dash)
Left turn ind
Logic
Low oil ind
Low ref
Low washer
Malfunction ind (mil)
Mil cntrl
Odometer
Oil gauge
Park brake switch (on park brake pedal assembly)
Pass off ind ctrl
Pass on ind ctrl
Pnk
Pss seat belt
Right turn ind
Run/ crank relay
Run/crk
Seat belt ind
Security ind
Speedometer
Sw sig
Tachometer
Tan
Tire pressure ind
Tow/haul ind
Traction control ind
Transmission temperature gauge
Underhood fuse block (left side of engine compt)
Volts gauge
Wait to start ind (6.6l)
Wait to strt
Wiper/washer system

Instrument Cluster Wiring Diagram (2 of 2) for GMC Sierra HD 2008 2500

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List of elements for Instrument Cluster Wiring Diagram (2 of 2) for GMC Sierra HD 2008 2500:

(6.6l)
(except 6.6l)
(in chassis harness) j331
(in front fuel tank) primary fuel level sensor
(in rear fuel tank) (6.0l (vin k)) rear fuel pump & sender assembly
(in rear fuel tank) (w/o auxiliary fuel tank 31 series) secondary fuel level sensor
(inside fuel tank) primary fuel pump & sender assembly
(on right front corner of hvac module) g200
4.3l
4.3l & 6.6l)
5v ref
6.6l
Driver information center (dic) switch (w/ accessory steering control)
Engine control module (ecm) (left front of engine compt, near fan shroud)
Engine controls system
Engine oil level (eol) switch (6.6l: on left side of engine oil pan) (except 4.3l & 6.6l: on right side of engine oil pan)
Engine oil pressure sensor (except 4.3l & 6.6l: top rear of engine) (4.3l: rear of engine)
Except 4.3l & 6.6l
Except 6.6l
Fuel lvl sig
G103 (except 4.3l & 6.6l) (on front of right cylinder head)
G106 (6.6l) (lower left side of engine)
Gnd
Information vehicle
Interior lights system
J203
Oil lvl sig
Oil press sig
Personali- zation
Pnk
Set/ reset
Trip/fuel

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram, with AN3/DL3 for GMC Sierra HD 2008 2500

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List of elements for Courtesy Lamps Wiring Diagram, with AN3/DL3 for GMC Sierra HD 2008 2500:

(in headliner harness, 15 cm from front inside air temperature sensor breakout) j327
(in right end of dash) right i/p junction block
(not used)
(on right front corner of hvac module) g200
3 convenience package
3b2
4a7
Bcm fuse 10a
Body control module (bcm) (lower left side of dash)
Center high mounted stop lamp (chmsl)
Computer data lines system
Ddm fuse 15a
Def sw
Defeat sw
Dome lamp
Dome lp sw
Dome sw
Dr door
Driver door latch assembly (in rear of left front door)
Driver door lock/window switch
Front dome/ reading lamps
G200 (on right front corner of hvac module)
G201 (upper left corner of dash)
G303 (on lower left "b" pillar)
G304 (on lower right "b" pillar)
Gnd
Headlamp & panel dimmer switch
Hot at all times
I/p fuse block (left side of dash)
Is lps fuse 10a
J201
J323
J328
Left i/p junction block (lower left side of dash)
Left rear door latch assembly (crew cab) (rear of left rear door)
Left sunshade (if equipped)
Left vanity mirror lamp
Low ref
Lr dr sw
Nca
Passenger door latch assembly (in rear of right front door)
Passenger door lock/window switch
Pdm fuse 15a
Reading lamps
Rear dome/ reading lamps (extended cab & crew cab)
Right rear door latch assembly (crew cab) (rear of right rear door)
Right sunshade (if equipped)
Right vanity mirror lamp
Rr dr sw
Ser data
Serial data
Sw sig
Tan
Volt
W/ comfort & decor level
W/o comfort & decor level
X10
X12

Courtesy Lamps Wiring Diagram, without AN3/DL3 for GMC Sierra HD 2008 2500

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List of elements for Courtesy Lamps Wiring Diagram, without AN3/DL3 for GMC Sierra HD 2008 2500:

(in body harness) j301
(in headliner harness, 15 cm from front inside air temperature sensor breakout) j327
(in rear of left front door) driver door latch assembly
(not used)
(w/ power windows) j502
3 convenience package
3a3
3a5
3b6
Bcm fuse 10a
Body control module (bcm) (lower left side of dash)
Center high mounted stop lamp (chmsl)
Computer data lines system
Def sw
Defeat sw
Dome
Dome lp sw
Dome sw
Dr door
Front dome/ reading lamps
G200 (on right front corner of hvac module)
G201 (upper left corner of dash)
G303 (on lower left "b" pillar)
G304 (on lower right "b" pillar)
Headlamp & panel dimmer switch
Hot at all times
I/p fuse block (left side of dash)
Is lps fuse 10a
J201
J323
J328
J602 (w/ power door lock control)
Left i/p junction block (lower left side of dash)
Left rear door latch assembly (crew cab) (rear of left rear door)
Left sunshade (if equipped)
Left vanity mirror lamp
Lf dr sw
Lr dr sw
Nca
Passenger door latch assembly (in rear of right front door)
Reading
Reading lamps
Rear dome/ reading lamps (extended cab & crew cab)
Rf dr sw
Right i/p junction block (in right end of dash)
Right rear door latch assembly (crew cab) (rear of right rear door)
Right sunshade (if equipped)
Right vanity mirror lamp
Rr dr sw
Serial data
Tan
Volt
W/ comfort & decor level
W/ crew cab
W/ electric door lock
W/o comfort & decor level
W/o crew cab
W/o electric door lock
X10
X12

Instrument Illumination Wiring Diagram (1 of 2) for GMC Sierra HD 2008 2500

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List of elements for Instrument Illumination Wiring Diagram (1 of 2) for GMC Sierra HD 2008 2500:

(automatic a/c)
(behind steering wheel)
(lower left side of dash) left i/p junction block
12v
Anti-lock brakes system
Auto
Bcm fuse 10a
Body control module (bcm) (lower left side of dash)
Closing sun roof, w/o individual front seat & power mirror
Computer data lines system
Dim cntrl
Dim ctrl
Dim sig
Driver information center (dic) switch
G200 (on right front corner of hvac module)
G201 (upper left corner of dash)
Head
Headlamp & panel dimmer switch
Hot at all times
Hvac control module
I/p fuse block (left side of dash)
I/p multi-function switch
Ind ctrl
Inflatable restraint steering wheel module coil x2
Instrument panel cluster (ipc)
Is lps fuse 10a
J201
J203
J214
J218 (in steering wheel harness, 9 cm from inflatable restraint steering wheel module coil x2)
Lamp, universal garage door opener & rear sliding window
Led dim
Left steering wheel control switch
Logic
Low ref
Manual a/c
Nca
Off
Park
Power take off (pto) module (outside of right front chassis frame)
Power take off (pto) switch (if equipped)
Prk lp sig
Radio
Rear object sensor control module (rear parking assist) (at rear cargo area, behind trim panel)
Right steering wheel control switch
Seat & power mirror
Serial data
Swc bklt fuse 2a
Tan
Trailer brake control module (20/30 series: left rear frame rail) (31 series: on left frame rail)
Trailer brake control switch
W/ accessory steering wheel control
W/ active brake control, adjustable power pedals, rear parking assist sensor indicator & heated windshield washer nozzles
W/ automatic cruise control, steering wheel heater & accessory steering wheel control
W/ electric door lock control
W/ electric remote
W/ power windows,
W/ roof mounted
W/ trailer brake
W/o accessory steering wheel control
W/o individual front
W/o individual front seat & power mirror
Windshield washer solvent heater (w/ windshield heated nozzles) (left rear corner of engine compt)
X10
X11

Instrument Illumination Wiring Diagram (2 of 2) for GMC Sierra HD 2008 2500

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List of elements for Instrument Illumination Wiring Diagram (2 of 2) for GMC Sierra HD 2008 2500:

& power mirror
(in right end of dash) right i/p junction block
(on lower left "b" pillar) g303
2 hi
2b4
3b5
4 hi
4 lo
Auto 4wd
Auto 4x4
Awd
Closing sun roof, w/o individual front seat & power mirror
Driver door lock switch
Driver window switch
Electronic 4x4
G200 (on right front corner of hvac module)
G201 (upper left corner of dash)
G304 (on lower right "b" pillar)
Garage door opener (gdo) (if equipped)
J200
J312 (in driver seat harness, 5 cm from driver seat belt buckle)
J323
J324
J602
J603
J604 (in right front door harness)
Lamp, universal garage door opener & rear sliding window
Left rear window switch
Logic
Outside rearview mirror switch
Passenger door lock switch
Passenger window switch
Pnk
Right rear window switch
Roof beacon switch (w/ wrecker emergency lamp, body builder emergency lamp & roof mounted lamp)
Seat & power mirror
Sliding rear window switch (if equipped)
Sunroof switch (if equipped)
Transfer case shift control module (lower left side of dash)
Transfer case shift control switch (on top left of transfer case)
W/ electric door lock control
W/ electric remote
W/ power windows,
W/ roof mounted
W/o individual front
W/o individual front seat & power mirror

MEMORY SYSTEMS

Adjustable Pedal Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Adjustable Pedal Wiring Diagram for GMC Sierra HD 2008 2500:

(in driver seat harness, 5 cm from driver seat adjuster assembly)
12v ref
5v ref
Computer data lines system
Driver seat 2 circuit breaker cb3 25a
Driver's memory seat circuit
Dsm fuse 10a
Electronic adjustable pedal (eap) assembly (under left side of dash)
Fwd ctrl
G303 (on lower left "b" pillar)
Gnd
Hot at all times
I/p fuse block (left side of dash)
I/p multifunction switch
J306
J309 (in driver seat harness, 20 cm from x303)
J310
J312 (in driver seat harness, 5 cm from driver seat belt buckle)
Left i/p junction block (lower left side of dash)
Left i/p junction block (lower left x2 side of dash)
Low ref
Memory seat module (msm) (under front of driver's seat)
Pnk
Rwd ctrl
Rwd sig
Sens sig
Ser data
Sw sig
Tan
X12
X13

Driver"s Memory Seat Wiring Diagram (1 of 2) for GMC Sierra HD 2008 2500

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List of elements for Driver"s Memory Seat Wiring Diagram (1 of 2) for GMC Sierra HD 2008 2500:

(in driver seat harness, 20 cm from x303) j309
(in driver seat jumper harness, 10 cm into x324 breakout)
(in driver seat jumper harness, 5 cm in x324 breakout)
(in driver's seat back)
12v ref
5v ref
Adjustable pedals circuit
Adjuster assembly)
Down ctrl
Driver seat 2 circuit breaker cb3 25a
Driver seat adjuster motor assembly (in driver's seat track)
Driver seat lumbar horizontal motor
Driver seat lumbar horizontal motor position sensor (in driver's seat track)
Driver seat lumbar vertical motor (in driver's seat back)
Driver seat lumbar vertical motor position sensor (in driver's seat track)
Driver seat recline motor (lower right side of driver seat back)
Driver seat recline position sensor (in driver's seat track)
Dsm fuse 10a
Element ctrl
Fwd ctrl
G303 (on lower left "b" pillar)
Gnd
Hot at all times
I/p fuse block (left side of dash)
J306
J340
J341
Junction block (lower left side of dash)
Left i/p
Memory seat module (under front of driver's seat)
Pnk
Rwd ctrl
Seats system
Sens sig
Sply volt
Tan
Temp sig
Up ctrl
X12

Driver"s Memory Seat Wiring Diagram (2 of 2) for GMC Sierra HD 2008 2500

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List of elements for Driver"s Memory Seat Wiring Diagram (2 of 2) for GMC Sierra HD 2008 2500:

(not used) b
12v ref
Adjustable pedals circuit
Computer data lines system
Down
Down sw sig
Driver door lock/ window switch
Driver memory/heated seat switch
Driver seat adjuster switch
Driver seat lumbar switch
E (not used)
Exit
Fwd
Fwd sig
Fwd sw sig
Horz sw sig
Low ref
Memory seat module (under front of driver's seat)
Pnk
Recln sw sig
Rwd
Rwd sig
Rwd sw sig
Seats system
Serial data
Sw sig
Tan
Up sw sig
Vert dn sw
Vert up sw

NAVIGATION

Navigation Wiring Diagram, with Y91 & with UQA (1 of 3) for GMC Sierra HD 2008 2500

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List of elements for Navigation Wiring Diagram, with Y91 & with UQA (1 of 3) for GMC Sierra HD 2008 2500:

(in overhead console) cellular telephone microphone
(left front of roof) cellular/ navigation & digital radio antenna
(lower left side of dash) left i/p junction block
(pins: 6-16 not used)
6.6l
Amp fuse 41 fuse 38 30a
Antenna
Aud sig
Audio w/ dvd navigation
Bare
Cellular/navigation & digital radio antenna (left front of roof)
Coax
Computer data lines system
Digital radio receiver (behind right end of dash)
Drain wire
Except 6.6l
G301 (below left side of passenger's seat)
Gmlan
Gmlan+
Gmlan-
Grd
Green led
Hot at all times
Info fuse 27 10a
Interior lights system
J204
Keypad sig
L aud+
L aud-
Led cntrl
Lf aud+
Lf aud-
Low ref
Low ref/ drain wire
Lr aud+
Lr aud-
Nca
Pnk
Power distribution system
R aud+
R aud-
Radio
Rdo fuse 42 fuse 39 15a
Red led
Rem sig
Rf aud+
Rf aud-
Rr aud+
Rr aud-
Tan
Underhood fuse block (left side of engine compt)
Vehicle communication interface module (vcim) (behind center of dash)
Voice sig
Voice sig/ tele sig
W/ gps
W/o gps
X12

Navigation Wiring Diagram, with Y91 & with UQA (2 of 3) for GMC Sierra HD 2008 2500

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List of elements for Navigation Wiring Diagram, with Y91 & with UQA (2 of 3) for GMC Sierra HD 2008 2500:

(left side of center console) noise compensation microphone
(under rear of center console) audio amplifier
Amplf+
Amplf-
Bare
Computer data lines system
Drain wire
F aud-
F centr spk+
F centr spk-
G301 (below left side of passenger's seat)
Gmlan
Grd
Infrared ref
Infrared v
Inside rearview mirror (isrvm)
J330
L infrared
L subwfr-
Lf aud+
Lf aud-
Lf spk+
Lf spk-
Lr aud+
Lr aud-
Microph volt
Nca
Pnk
R infrared
R subwfr+
R subwfr-
Rear seat audio (rsa) controller
Rf aud+
Rf spk+
Rf spk-
Rr aud+
Rr aud-
Subwfr+
Subwoofer speaker
Tan

Navigation Wiring Diagram, with Y91 & with UQA (3 of 3) for GMC Sierra HD 2008 2500

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List of elements for Navigation Wiring Diagram, with Y91 & with UQA (3 of 3) for GMC Sierra HD 2008 2500:

3a1
3a2
Ampl+
Ampl-
Anti-lock brakes system
Aud low ref
Audio/video adapter
Aux vid h
Aux video h
Bare
Center i/p speaker
Drain wire
Dvd aud com
Dvd aud sh
Dvd comm
Dvd+
Dvd-
Grd
I/p fuse block (left side of dash)
Infrared module (in headliner)
Infrared+
Infrared-
L aud sig
L aux aud
L aux vid
L dvd+
Left front speaker
Left front tweeter speaker
Left rear speaker
Nca
Nca b+
Nca dvd+
Nca dvd-
Nca enable sig
Nca grd
Nca video cntrl
Nca video sig
Pnk
R aud sig
R aux aud
R aux vid
R dvd+
Radio
Right front speaker
Right front tweeter speaker
Right i/p junction block (in right end of dash)
Right rear speaker
Signal+
Signal-
Tan
Video cntrl
Video display
Video sig
Volt
Vss

Navigation Wiring Diagram, with Y91 & without UQA (1 of 3) for GMC Sierra HD 2008 2500

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List of elements for Navigation Wiring Diagram, with Y91 & without UQA (1 of 3) for GMC Sierra HD 2008 2500:

(in overhead console) cellular telephone microphone
(left front of roof) cellular/ navigation & digital radio antenna
(lower left side of dash) left i/p junction block
(pins: 6-16 not used)
6.6l
Antenna
Aud sig
Audio w/ dvd navigation
Bare
Cellular/ navigation & digital radio antenna (left front of roof)
Coax
Computer data lines system
Digital radio receiver
Drain wire
Except 6.6l
G301 (below left side of passenger's seat)
Gmlan
Gmlan+
Gmlan-
Gnd
Grd
Green led
Hot at all times
I/p fuse block (left side of dash)
Info fuse 27 10a
Interior lights system
J204
Keypad sig
L aud+
L aud-
Led cntrl
Lf spk+
Lf spk-
Low ref
Low ref/ drain wire
Lr aud+
Lr aud-
Nca
Pnk
Power distribution system
R aud+
R aud-
Radio
Rdo fuse 42 fuse 39 15a
Red led
Rem sig
Rf spk+
Rf spk-
Rr aud+
Rr aud-
Tan
Underhood fuse block (left side of engine compt)
Vehicle communication interface module (vcim) (behind center of dash)
Voice sig
Voice sig/ tele sig
W/ gps
W/o gps
X12

Navigation Wiring Diagram, with Y91 & without UQA (2 of 3) for GMC Sierra HD 2008 2500

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List of elements for Navigation Wiring Diagram, with Y91 & without UQA (2 of 3) for GMC Sierra HD 2008 2500:

2a1
Bare
Computer data lines system
Drain wire
G301 (below left side of passenger's seat)
Gmlan
Gnd
Hot at all times
I/p fuse block (left side of dash)
Infrared ref
Infrared v
Inside rearview mirror (isrvm)
J330
L infrared
Left i/p junction block x12 (lower left side of dash)
Nca
Pnk
R infrared
Rear seat audio (rsa) control
Rear seat ent fuse 16 5a
Right i/p j/b (in right end of dash)
Tan
W/ performance enhanced audio
W/o performance enhanced audio

Navigation Wiring Diagram, with Y91 & without UQA (3 of 3) for GMC Sierra HD 2008 2500

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List of elements for Navigation Wiring Diagram, with Y91 & without UQA (3 of 3) for GMC Sierra HD 2008 2500:

(w/ performance enhanced audio) left front tweeter speaker
(w/ performance enhanced audio) right front tweeter speaker
3a1
Anti-lock brakes system
Aud low ref
Audio/video adapter
Aux vid h
Aux video h
Bare
Drain wire
Dvd aud com
Dvd aud sh
Dvd comm
Dvd+
Dvd-
Gnd
I/p fuse block (left side of dash)
Infrared module (in headliner)
Infrared+
Infrared-
L aud sig
L aux aud
L aux vid
L dvd+
Left front speaker
Left rear speaker
Nca
Nca b+
Nca dvd+
Nca dvd-
Nca enable sig
Nca gnd
Nca video cntrl
Nca video sig
Pnk
R aud sig
R aux aud
R aux vid
R dvd+
Radio
Right front speaker
Right rear speaker
Signal+
Signal-
Tan
Video cntrl
Video display
Video sig
Volt
Vss

Navigation Wiring Diagram, without Y91 & with UQA (1 of 3) for GMC Sierra HD 2008 2500

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List of elements for Navigation Wiring Diagram, without Y91 & with UQA (1 of 3) for GMC Sierra HD 2008 2500:

(in overhead console) cellular telephone microphone
(left front of roof) cellular/ navigation & digital radio antenna
(lower left side of dash) left i/p junction block
6.6l
Amp fuse 41 fuse 38 30a
Ampl cntrl
Antenna
Aud sig
Audio w/ dvd navigation
Bare
Cellular/navigation & digital radio antenna (left front of roof)
Coax
Computer data lines system
Digital radio receiver (behind right end of dash)
Drain wire
Except 6.6l
G301 (below left side of passenger's seat)
Gmlan
Gmlan+
Gmlan-
Grd
Green led
Hot at all times
Info fuse 27 10a
Interior lights system
Keypad sig
L aud+
L aud-
Left i/p junction block (lower left x3
Lf aud+
Lf aud-
Low ref
Low ref/ drain wire
Lr aud+
Lr aud-
Nca
Not used
Pins: 6-16 not used
Pnk
R aud+
R aud-
Radio
Rdo fuse 42 fuse 39 15a
Red led
Rem sig/ led cntrl
Rf aud+
Rf aud-
Rr aud+
Rr aud-
Side of dash)
Tan
Tele sig
Underhood fuse block (left side of engine compt)
Vehicle communication interface module (vcim) (behind center of dash)
Voice sig
W/ gps
W/o gps
X12

Navigation Wiring Diagram, without Y91 & with UQA (2 of 3) for GMC Sierra HD 2008 2500

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List of elements for Navigation Wiring Diagram, without Y91 & with UQA (2 of 3) for GMC Sierra HD 2008 2500:

(under rear of center console) audio amplifier
2a1
Ampl cntrl
Bare
Computer data lines system
Drain wire
F aud-
G301 (below left side of passenger's seat)
Gmlan
Grd
Hot at all times
I/p fuse block (left side of dash)
Infrared ref
Infrared v
Inside rearview mirror (isrvm)
J330
L infrared
L subwfr+
L subwfr-
Lf aud+
Lf aud-
Lf spk+
Lf spk-
Lr aud+
Lr aud-
Nca
Pnk
R infrared
R subwfr+
R subwfr-
Rear seat audio (rsa) controller
Rear seat ent fuse 5a
Rem enable
Rf aud+
Rf spk+
Rf spk-
Right i/p j/b (in right end of dash)
Rr aud
Rr aud+
Rr aud-
Subwoofer speaker
Tan

Navigation Wiring Diagram, without Y91 & with UQA (3 of 3) for GMC Sierra HD 2008 2500

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List of elements for Navigation Wiring Diagram, without Y91 & with UQA (3 of 3) for GMC Sierra HD 2008 2500:

3a1
3a2
Anti-lock brakes system
Aud low ref
Audio/video adapter
Aux vid h
Aux video h
Bare
Drain wire
Dvd aud com
Dvd aud sh
Dvd comm
Dvd+
Dvd-
Grd
I/p fuse block (left side of dash)
Infrared module (in headliner)
Infrared+
Infrared-
L aud sig
L aux aud
L aux vid
L dvd+
Left front speaker
Left front tweeter speaker
Left rear speaker
Nca
Nca b+
Nca dvd+
Nca dvd-
Nca enable sig
Nca grd
Nca video cntrl
Nca video sig
Pnk
R aud sig
R aux aud
R aux vid
R dvd+
Radio
Right front speaker
Right front tweeter speaker
Right i/p junction block (in right end of dash)
Right rear speaker
Signal+
Signal-
Tan
Video cntrl
Video display
Video sig
Volt
Vss

Navigation Wiring Diagram, without Y91 & without UQA (1 of 3) for GMC Sierra HD 2008 2500

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List of elements for Navigation Wiring Diagram, without Y91 & without UQA (1 of 3) for GMC Sierra HD 2008 2500:

(in overhead console) cellular telephone microphone
(left front of roof) cellular, navigation & digital radio antenna
(lower left side of dash) left i/p junction block
(pins: 6-16 not used)
6.6l
Antenna
Aud sig
Audio w/ dvd navigation
Bare
Cellular/ navigation & digital radio antenna (left front of roof)
Coax
Computer data lines system
Digital radio receiver
Drain wire
Except 6.6l
G301 (below left side of passenger's seat)
Gmlan
Gmlan+
Gmlan-
Gnd
Grd
Green led
Hot at all times
I/p fuse block (left side of dash)
Info fuse 27 10a
Interior lights system
Keypad sig
L aud+
L aud-
Led cntrl
Lf spk+
Lf spk-
Low ref
Low ref/ drain wire
Lr aud+
Lr aud-
Nca
Pnk
R aud+
R aud-
Radio
Rdo fuse 42 fuse 39 15a
Red led
Rf spk+
Rf spk-
Rr aud+
Rr aud-
Tan
Underhood fuse block (left side of engine compt)
Vehicle communication interface module (vcim) (behind center of dash)
Voice sig
Voice sig/ tele sig
W/ gps
W/o gps
X12

Navigation Wiring Diagram, without Y91 & without UQA (2 of 3) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for Navigation Wiring Diagram, without Y91 & without UQA (2 of 3) for GMC Sierra HD 2008 2500:

2a1
Bare
Computer data lines system
Drain wire
G301 (below left side of passenger's seat)
Gmlan
Gnd
Hot at all times
I/p fuse block (left side of dash)
Infrared ref
Infrared v
Inside rearview mirror (isrvm)
J330
L infrared
Left i/p junction block x12 (lower left side of dash)
Pnk
R infrared
Rear seat audio (rsa) control
Rear seat ent fuse 16 5a
Right i/p j/b (in right end of dash)
Tan
W/ performance enhanced audio
W/o performance enhanced audio

Navigation Wiring Diagram, without Y91 & without UQA (3 of 3) for GMC Sierra HD 2008 2500

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List of elements for Navigation Wiring Diagram, without Y91 & without UQA (3 of 3) for GMC Sierra HD 2008 2500:

(w/ performance enhanced audio) left front tweeter speaker
(w/ performance enhanced audio) right front tweeter speaker
Anti-lock brakes system
Aud low ref
Audio/video adapter
Aux vid h
Aux video h
Bare
Drain wire
Dvd aud com
Dvd aud sh
Dvd comm
Dvd+
Dvd-
Gnd
I/p fuse block (left side of dash)
Infrared module (in headliner)
Infrared+
Infrared-
L aud sig
L aux aud
L aux vid
L dvd+
Left front speaker
Left rear speaker
Nca
Nca b+
Nca dvd+
Nca dvd-
Nca enable sig
Nca gnd
Nca video cntrl
Pnk
R aud sig
R aux aud
R aux vid
R dvd+
Radio
Right front speaker
Right rear speaker
Signal+
Signal-
Tan
Video cntrl
Video display
Video sig
Volt
Vss

Parking Assistant Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Parking Assistant Wiring Diagram for GMC Sierra HD 2008 2500:

(below right side of passenger's seat) g302
(license lamp harness, 20 cm from right rear object sensors)
(license lamp harness, 28 cm from left rear object sensors) j403
(upper left corner of dash) g201
Amber ind
B5 x2
Body control module (bcm) (lower left side of dash)
Computer data lines system
Disable sig
Driver information center (dic) display
Gmlan
Gnd
Hot at all times
I/p fuse block (left side of dash)
I/p multi-function switch
Ind dim
J201
J302
J404
Led disable
Left i/p junction block (lower left side of dash)
Left rear corner object sensor (left corner of rear bumper)
Left rear middle object sensor (left side of rear bumper)
Low ref
Lr sns sig
Obs det fuse 10a
Rear object sensor control module (at rear cargo area, behind trim panel)
Rear park assist disable switch
Red ind
Right rear corner object sensor (right corner of rear bumper)
Right rear middle object sensor (right side of rear bumper)
Rr sns sig
Sns sig

POWER DISTRIBUTION

4.3L VIN X

4.3L VIN X, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500

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List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500:

(in fuse block jumper harness) j210
(in fuse block jumper harness) j211
(in fuse block jumper harness) j224
(in roof console) emergency vehicle roof lamp relay
(info not available)
(not used)
(on lower left front of engine) (except 4.3l) g102
175a
4 speed a/t
6 speed a/t
6.0l (vin k)
6a6
Auto 4x4
Automatic a/c
Auxiliary battery relay (if equipped) (rear of x1 engine compt)
Auxiliary battery run relay
Body builder emergency lamp
Body control module (bcm)
Data link connector (dlc)
Ecm- batt fuse 12 10a
Electronic 4x4 & auto 4x4
Engine control module (ecm)
Evaporative emission (evap) canister vent solenoid valve
From left i/p j/b (diagram 4 of 6)
From underhood fuse block (diagram 6 of 6)
Fuse a 30a
Fuse b 30a
Fuse c 30a
Fuse d 30a
Fuse holder (right side of firewall)
G103 (on front of right cylinder head)
G107 (4.3l) (top left rear of engine)
G200 (on right front corner of hvac module)
Generator
Hdlp wash fuse 22 20a
Hvac batt fuse 39 10a
Hvac control module
I/p 1 accessory power outlet
Instrument panel cluster (ipc)
Ipc fuse 46 10a
Itbc fuse 6 15a
J145
J200
J209 (in fuse block jumper harness)
J219
Left battery
Left i/p j/b (lower left x2
Ltr fuse 53 20a
Manual a/c
Mega fuse (right rear of engine compt)
Mega fuse 125a
Mega fuse 175a
Mega fuse 60a
Nca
Red
Relay a
Relay b
Right battery
Right i/p j/b (in right end of dash)
Seo b2 fuse 37 30a
Side of dash)
Starter
Stud 2 fuse 63 30a
Tcm-batt fuse 14 15a
To roof beacon switch (diagram 2 of 6)
To stud 1 fuse 68 (diagram 2 of 6)
To underhood fuse block (diagram 2 of 6)
To underhood fuse block (diagram 3 of 6)
Trailer brake control module (if equipped)
Trailer brake control relay (if equipped)
Transfer case encoder motor
Transfer case shift control module
Transmission control module (tcm)
Trec fuse 67 30a
Underhood fuse block (left side of engine compt)
W/ auxiliary battery
W/ emergency vehicle roof lamp relay
W/ wrecker emergency lamp provisions
W/ wrecker relay
Windshield washer solvent heater (if equipped)
Wrecker relay
Wsw/htr fuse 66 60a
X14

4.3L VIN X, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500:

(in camper harness) j414
(in sliding rear window jumper harness) j336
(not used)
(w/ individual front seat) j315
Abs-1 fuse 61 40a
Abs-2 fuse 9 25a
Bcm fuse 10a
Blower motor control module
Body control module (bcm)
Comfort & decor level 3 convenience package
Cooled seats fuse 30a
Ctsy fuse 15a
Ddm fuse 15a
Dim fuse 15a
Driver door lock/ window switch
Driver power seat adjuster
Driver seat 2 circuit breaker cb3 25a
Driver seat adjuster switch
Driver window switch
Dsm fuse 10a
Elec run board fuse 65 30a
Electronic brake control module (ebcm)
Except 4.3l, 5.3l (vin o), 6.0l & 5.3l (vin 3)
From fusible link 3 (diagram 1 of 6)
From ipc f fuse 46 (diagram 1 of 6)
From pdm fuse (diagram 3 of 6)
From right i/p j/b (diagram 1 of 6)
Front seat
Fscm fuse 21 20a
Fuel system control module (fscm)
G200 (on right front corner of hvac module)
Heavy duty abs fuse 59 60a
Hvac blwr fuse 70 40a
Hydraulic power brake control
I/p fuse block (left side of dash)
J323
Lbec 2 fuse 72 60a
Left i/p j/b (lower left side of dash)
Left i/p j/b (lower left side x1
Left rear window switch
Lt dr circuit breaker 25a
Mbec 1 fuse 69 60a
Memory seat module (msm)
Obs det fuse 10a
Of dash)
Outside rearview mirror switch
Pass seat 1 circuit breaker cb2 25a
Passenger door lock/ window switch
Passenger power seat adjuster
Passenger seat adjuster switch
Passenger seat lumbar switch
Passenger window switch
Pwr mir fuse 2a
Pwr rear wndw circuit breaker cb4 25a
Rear hvac fuse 30a
Rear object sensor control module (w/ rear parking assist)
Rear seat fuse 20a
Rear wpr fuse 25a
Red
Remote control door lock receiver (rcdlr)
Right i/p j/b (in right end of x3 dash)
Right i/p j/b (in right end of x6 dash)
Right rear window switch
Roof beacon relay (in overhead console)
Roof beacon switch
Rt doors circuit breaker cb1 25a
Rt stop trn fuse 15a
S/roof fuse 34 30a
Sliding rear window close relay
Sliding rear window open relay
Stud 1 fuse 68 (auxiliary battery) 40a
Sunroof module
To lgm fuse 71 (diagram 3 of 6)
Trailer connector
Underhood fuse block (left side of engine compt)
W/ active & vacuum power brake control
W/ comfort & decor level 3 convenience package
W/ electrical alarm bulb & camper trailer provision
W/ electrical alarm bulb & w/o camper trailer provision
W/ individual
W/ individual front seat
W/ individual front seat & power mirror
W/ power window
W/ restraint system
W/ roof beacon relay
W/ sunroof
W/ truck trailer hd wiring harness
W/ wrecker & emergency vehicle roof lamp relay
W/o comfort & decor level 3 convenience package
W/o individual
W/o individual front seat
W/o individual front seat & power mirror
X10
X11
X12

4.3L VIN X, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500:

(in pto jumper harness) (w/ power take off) j127
(lower left side of dash) left i/p j/b
(not used)
2a1
Air bag batt fuse 45 15a
Alc/comp fuse 58 40a
Amp fuse 41 30a
Audio amplifier (premium audio branded w/ amplifier speaker system)
Automatic a/c
Aux pwr 2 fuse 20a
Aux pwr fuse 20a
Body control module (bcm)
Center console accessory power outlet
Center console compartment accessory power outlet
Center seat accessory power outlet
Chime module
Comfort & decor level 3 convenience package
Crew cab w/ individual front seat
Digital radio receiver (if equipped)
Enhanced audio
Esc/alc exh fuse 2 30a
Exp/pto fuse 47 15a
From auxiliary battery run relay (diagram 1 of 6)
From fscm fuse 21 (diagram 2 of 6)
G200 (on right front corner of hvac module)
G304 (on lower right "b" pillar)
Garage door opener (gdo)
Hvac control module
I/p 2 accessory power outlet
I/p fuse block (left side of dash)
Inflatable restraint passenger presence system (pps) module (if equipped)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint vehicle rollover sensor
Info fuse 10a
Is lps fuse 10a
J200
J203
J304
Lbec 1 fuse 64 60a
Left i/p j/b (lower left side of dash)
Left i/p j/b (lower left side x10
Lgm fuse 71 30a
Lock pcb relay
Lock/unlock pcb relay
Lt stop trn fuse 15a
Luxury edition
Manual a/c
Merchandised package
Nca
Of dash)
Passenger door lock/ window switch
Pdm fuse (w/ comfort & decor level 3 convenience package & luxury) 15a
Performance
Power locks w/o individual front seat & power mirror
Power take off (pto) relay
Premium audio branded
Radio
Rdo fuse 42 15a
Rear seat audio (rsa) control (if equipped)
Rear seat ent fuse 5a
Right i/p j/b (in right end of dash)
Right i/p j/b (in right end of x2 dash)
Stop lamps fuse 15a
To body control module (diagram 4 of 6)
To dlis fuse 35 (diagram 4 of 6)
To left i/p block (diagram 2 of 6)
To lt dr circuit breaker (diagram 2 of 6)
Underhood fuse block (left side of engine compt)
Unlock pcb relay
Vehicle communication interface module (vcim)
Video display
W/ amplifier speaker system
W/ az3
W/ custom console front compt floor
W/ head curtain air bag
W/ individual front seat & power mirror
W/ luxury
W/ rear seat entertain- ment package
W/ universal garage door opener
W/ wrecker, emergency vehicle roof lamp & roof beacon relay
W/o luxury
W/o radio
Windshield washer solvent heater (if equipped)
X11

4.3L VIN X, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500:

(if equipped) windshield outside moisture sensor
(in instrument panel harness, in transfer case shift control module connector breakout) j207
(in the steering column harness) j216
(not used)
12v
2a1
2a4
4 speed a/t
4.3l
6 speed a/t
Acc
Acc volt
Automatic transmission manual shift switch
Automatic transmission shift lever
Body control module (bcm)
Column harness) j213
Comfort & decor level 3 convenience package w/o individual front seat & power mirror
Dlis fuse 35 2a
Driver window switch
Electronic 4x4 & auto 4x4
Engine control module (ecm)
Except 4.3l
Except comfort & decor level 3 convenience package w/o individual front seat & power mirror
Except electronic 4x4 & auto 4x4
From lbec 1 fuse 64 (diagram 3 of 6)
From underhood fuse block (diagram 3 of 6)
Ign
Ignition switch
Inflatable restraint steering wheel module coil
J104 (in engine harness, 5 cm from engine control module connector breakout)
J212 (in steering column harness)
J231
Left i/p j/b (lower left side of dash)
Left steering wheel control switch
Nca
Off
Passenger window switch
Pnk
Rear sliding window switch (if equipped)
Right i/p j/b (in right end of dash)
Right i/p j/b (in right end of x2 dash)
Right steering wheel control switch
Run
Start
Sunroof control module (if equipped)
Theft deterrent module (tdm)
To mobile radio fuse block (diagram 1 of 6)
To run/crnk relay (diagram 5 of 6)
To underhood fuse block (diagram 5 of 6)
Transfer case shift control module
Transfer case shift control switch
Transmission control module (tcm)
Underhood fuse block (left side of engine compt)
W/ 10 series
W/ 10 series, auto 4x4 & electronic 4x4
W/ 4 speed, accessory steering wheel & automatic electronic cruise control
W/ 6 speed
W/ accessory steering wheel & automatic electronic cruise control
W/ accessory steering wheel control
W/ power window
W/0 10 series, auto 4x4 & electronic 4x4
W/o accessory steering wheel & automatic electronic cruise control
W/o accessory steering wheel control
X14
X201

4.3L VIN X, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500

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List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500:

(in fuse block jumper harness) j220
(not used)
4-speed a/t
4wd & 2 speed manual shift control transfer case
6-speed a/t
7.5a
A/c cmprsr relay
Air bag ign fuse 40 10a
Automatic transmission
Aux hvac- ign fuse 48 10a
Bck/up lamp pcb relay
Chmsl pcb relay
Drl pcb relay
Ecm-ign fuse 56 15a
Engine control module (ecm)
Except 4wd & 2 speed manual shift control transfer case
Fog lamp relay
From body control module (diagram 4 of 6)
From dlis fuse 35 (diagram 4 of 6)
Front drive axle actuator
Frt wash pcb relay
Frt wpr fuse 36 25a
Fuel pmp relay
Fuel system control module (fscm)
G107 (4.3l) g102 (except 4.3l) (4.3l: top left rear of engine) (except 4.3l: on lower left front of engine)
Hdlp lo/hid relay
Heated steering fuse
Heated steering wheel control module
Hi beam pcb relay
Horn pcb relay
Hvac-ign fuse 55 10a
Inflatable restraint i/p module disable switch (if equipped)
Inflatable restraint passenger air bag on/off indicator (if equipped)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint steering wheel module coil
Inside rearview mirror (isrvm)
Instrument panel cluster (ipc)
J105
J130 (in engine harness)
L/gate pcb relay
Left air temperature actuator (automatic a/c)
Left i/p j/b (lower left x9
Misc ing fuse 43 10a
Mode actuator
Nca
Park lamp relay
Pnk
Rear defog relay
Rear wash pcb relay
Recirculation actuator
Red
Right air temperature actuator (automatic a/c) air temperature actuator (manual a/c)
Right i/p j/b (in right end of dash)
Run/ crnk relay
Secondary fuel pump relay (6.0l (vin k) w/o auxiliary fuel tank)
Seo/alc fuse 54 10a
Side of dash)
Stop lamp switch
Strtr relay
To fan 1 fuse 57 (diagram 6 of 6)
Trailer brake control module (if equipped)
Trans ign 1 fuse 19 15a
Transfer case shift control module
Transmission control module (tcm)
Trlr lt stop/turn pcb relay
Trlr rt stop/turn pcb relay
Underhood fuse block (left side of engine compt)
W/ auto 4x4 & electronic 4x4
W/ steering wheel heater
W/o 4.3l, 5.3l (vin o), 6.0l (vin k) & 5.3l (vin 3)
W/o steering wheel heater
Wiper control pcb relay
Wiper speed pcb relay
X1 left i/p j/b (lower left x9
X11
X12
X14
X175

4.3L VIN X, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500

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List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500:

(in ignition coil jumper harness, between ignition coils 4 & 2) j110
(in ignition coil jumper harness, between ignition coils 5 & 7) j107
(in spo theft harness) j227
(not used)
4.3l
Auxiliary battery
Central sequential fuel injection (central sfi)
Eap fuse 38 15a
Ecm/throt cont fuse 5 15a
Electronic adjustable pedals pcb relay
Eng fuse 4 15a
Engine control module (ecm)
Evaporative emission (evap) canister purge solenoid valve
Except 4.3l
Fan cntrl relay
Fan hi relay
Fan lo relay
Fan-1 fuse 57 40a
Fan-2 fuse 60 40a
From frt wpr p fuse 36 (diagram 5 of 6)
Fuel injector
Heated oxygen sensor (ho2s) bank 1 sensor 1
Heated oxygen sensor (ho2s) bank 1 sensor 2
Heated oxygen sensor (ho2s) bank 2 sensor 1
Heated oxygen sensor (ho2s) bank 2 sensor 2
Ignition coil/ module
Ignition control module (icm)
Inj-a fuse 24 20a
Inj-b fuse 13 (except 4.3l) 20a
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
O2-a snsr fuse 18 10a
O2-b snsr fuse 8 10a
Park enable pcb relay
Pnk
Pnk (in engine harness) j128
Power take off (pto) module (if equipped)
Pwr/ trn relay
Security indicator lamp
Seo b1 fuse 52 15a
Spo alarm
To auxiliary battery run relay (diagram 1 of 6)
Underhood fuse block (left side of engine compt)
Valve lifter oil manifold (vlom) assembly (5.3l, 6.0l & 6.2l)
Vehicle inclination sensor
Vehicle shock sensor
W/ comfort & decor level 3 convenience package & luxury
X14
X2 left i/p j/b (lower left side of dash)

4.8L VIN C

4.8L VIN C, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500

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List of elements for 4.8L VIN C, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500:

(in fuse block jumper harness) j210
(in fuse block jumper harness) j211
(in fuse block jumper harness) j224
(in roof console) emergency vehicle roof lamp relay
(info not available)
(not used)
(on lower left front of engine) (except 4.3l) g102
175a
4 speed a/t
6 speed a/t
6.0l (vin k)
6a6
Auto 4x4
Automatic a/c
Auxiliary battery relay (if equipped) (rear of x1 engine compt)
Auxiliary battery run relay
Body builder emergency lamp
Body control module (bcm)
Data link connector (dlc)
Ecm- batt fuse 12 10a
Electronic 4x4 & auto 4x4
Engine control module (ecm)
Evaporative emission (evap) canister vent solenoid valve
From left i/p j/b (diagram 4 of 6)
From underhood fuse block (diagram 6 of 6)
Fuse a 30a
Fuse b 30a
Fuse c 30a
Fuse d 30a
Fuse holder (right side of firewall)
G103 (on front of right cylinder head)
G107 (4.3l) (top left rear of engine)
G200 (on right front corner of hvac module)
Generator
Hdlp wash fuse 22 20a
Hvac batt fuse 39 10a
Hvac control module
I/p 1 accessory power outlet
Instrument panel cluster (ipc)
Ipc fuse 46 10a
Itbc fuse 6 15a
J145
J200
J209 (in fuse block jumper harness)
J219
Left battery
Left i/p j/b (lower left x2
Ltr fuse 53 20a
Manual a/c
Mega fuse (right rear of engine compt)
Mega fuse 125a
Mega fuse 175a
Mega fuse 60a
Nca
Red
Relay a
Relay b
Right battery
Right i/p j/b (in right end of dash)
Seo b2 fuse 37 30a
Side of dash)
Starter
Stud 2 fuse 63 30a
Tcm-batt fuse 14 15a
To roof beacon switch (diagram 2 of 6)
To stud 1 fuse 68 (diagram 2 of 6)
To underhood fuse block (diagram 2 of 6)
To underhood fuse block (diagram 3 of 6)
Trailer brake control module (if equipped)
Trailer brake control relay (if equipped)
Transfer case encoder motor
Transfer case shift control module
Transmission control module (tcm)
Trec fuse 67 30a
Underhood fuse block (left side of engine compt)
W/ auxiliary battery
W/ emergency vehicle roof lamp relay
W/ wrecker emergency lamp provisions
W/ wrecker relay
Windshield washer solvent heater (if equipped)
Wrecker relay
Wsw/htr fuse 66 60a
X14

4.8L VIN C, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500

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List of elements for 4.8L VIN C, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500:

(in camper harness) j414
(in sliding rear window jumper harness) j336
(not used)
(w/ individual front seat) j315
Abs-1 fuse 61 40a
Abs-2 fuse 9 25a
Bcm fuse 10a
Blower motor control module
Body control module (bcm)
Comfort & decor level 3 convenience package
Cooled seats fuse 30a
Ctsy fuse 15a
Ddm fuse 15a
Dim fuse 15a
Driver door lock/ window switch
Driver power seat adjuster
Driver seat 2 circuit breaker cb3 25a
Driver seat adjuster switch
Driver window switch
Dsm fuse 10a
Elec run board fuse 65 30a
Electronic brake control module (ebcm)
Except 4.3l, 5.3l (vin o), 6.0l & 5.3l (vin 3)
From fusible link 3 (diagram 1 of 6)
From ipc f fuse 46 (diagram 1 of 6)
From pdm fuse (diagram 3 of 6)
From right i/p j/b (diagram 1 of 6)
Front seat
Fscm fuse 21 20a
Fuel system control module (fscm)
G200 (on right front corner of hvac module)
Heavy duty abs fuse 59 60a
Hvac blwr fuse 70 40a
Hydraulic power brake control
I/p fuse block (left side of dash)
J323
Lbec 2 fuse 72 60a
Left i/p j/b (lower left side of dash)
Left i/p j/b (lower left side x1
Left rear window switch
Lt dr circuit breaker 25a
Mbec 1 fuse 69 60a
Memory seat module (msm)
Obs det fuse 10a
Of dash)
Outside rearview mirror switch
Pass seat 1 circuit breaker cb2 25a
Passenger door lock/ window switch
Passenger power seat adjuster
Passenger seat adjuster switch
Passenger seat lumbar switch
Passenger window switch
Pwr mir fuse 2a
Pwr rear wndw circuit breaker cb4 25a
Rear hvac fuse 30a
Rear object sensor control module (w/ rear parking assist)
Rear seat fuse 20a
Rear wpr fuse 25a
Red
Remote control door lock receiver (rcdlr)
Right i/p j/b (in right end of x3 dash)
Right i/p j/b (in right end of x6 dash)
Right rear window switch
Roof beacon relay (in overhead console)
Roof beacon switch
Rt doors circuit breaker cb1 25a
Rt stop trn fuse 15a
S/roof fuse 34 30a
Sliding rear window close relay
Sliding rear window open relay
Stud 1 fuse 68 (auxiliary battery) 40a
Sunroof module
To lgm fuse 71 (diagram 3 of 6)
Trailer connector
Underhood fuse block (left side of engine compt)
W/ active & vacuum power brake control
W/ comfort & decor level 3 convenience package
W/ electrical alarm bulb & camper trailer provision
W/ electrical alarm bulb & w/o camper trailer provision
W/ individual
W/ individual front seat
W/ individual front seat & power mirror
W/ power window
W/ restraint system
W/ roof beacon relay
W/ sunroof
W/ truck trailer hd wiring harness
W/ wrecker & emergency vehicle roof lamp relay
W/o comfort & decor level 3 convenience package
W/o individual
W/o individual front seat
W/o individual front seat & power mirror
X10
X11
X12

4.8L VIN C, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for 4.8L VIN C, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500:

(in pto jumper harness) (w/ power take off) j127
(lower left side of dash) left i/p j/b
(not used)
2a1
Air bag batt fuse 45 15a
Alc/comp fuse 58 40a
Amp fuse 41 30a
Audio amplifier (premium audio branded w/ amplifier speaker system)
Automatic a/c
Aux pwr 2 fuse 20a
Aux pwr fuse 20a
Body control module (bcm)
Center console accessory power outlet
Center console compartment accessory power outlet
Center seat accessory power outlet
Chime module
Comfort & decor level 3 convenience package
Crew cab w/ individual front seat
Digital radio receiver (if equipped)
Enhanced audio
Esc/alc exh fuse 2 30a
Exp/pto fuse 47 15a
From auxiliary battery run relay (diagram 1 of 6)
From fscm fuse 21 (diagram 2 of 6)
G200 (on right front corner of hvac module)
G304 (on lower right "b" pillar)
Garage door opener (gdo)
Hvac control module
I/p 2 accessory power outlet
I/p fuse block (left side of dash)
Inflatable restraint passenger presence system (pps) module (if equipped)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint vehicle rollover sensor
Info fuse 10a
Is lps fuse 10a
J200
J203
J304
Lbec 1 fuse 64 60a
Left i/p j/b (lower left side of dash)
Left i/p j/b (lower left side x10
Lgm fuse 71 30a
Lock pcb relay
Lock/unlock pcb relay
Lt stop trn fuse 15a
Luxury edition
Manual a/c
Merchandised package
Nca
Of dash)
Passenger door lock/ window switch
Pdm fuse (w/ comfort & decor level 3 convenience package & luxury) 15a
Performance
Power locks w/o individual front seat & power mirror
Power take off (pto) relay
Premium audio branded
Radio
Rdo fuse 42 15a
Rear seat audio (rsa) control (if equipped)
Rear seat ent fuse 5a
Right i/p j/b (in right end of dash)
Right i/p j/b (in right end of x2 dash)
Stop lamps fuse 15a
To body control module (diagram 4 of 6)
To dlis fuse 35 (diagram 4 of 6)
To left i/p block (diagram 2 of 6)
To lt dr circuit breaker (diagram 2 of 6)
Underhood fuse block (left side of engine compt)
Unlock pcb relay
Vehicle communication interface module (vcim)
Video display
W/ amplifier speaker system
W/ az3
W/ custom console front compt floor
W/ head curtain air bag
W/ individual front seat & power mirror
W/ luxury
W/ rear seat entertain- ment package
W/ universal garage door opener
W/ wrecker, emergency vehicle roof lamp & roof beacon relay
W/o luxury
W/o radio
Windshield washer solvent heater (if equipped)
X11

4.8L VIN C, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for 4.8L VIN C, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500:

(if equipped) windshield outside moisture sensor
(in instrument panel harness, in transfer case shift control module connector breakout) j207
(in the steering column harness) j216
(not used)
12v
2a1
2a4
4 speed a/t
4.3l
6 speed a/t
Acc
Acc volt
Automatic transmission manual shift switch
Automatic transmission shift lever
Body control module (bcm)
Column harness) j213
Comfort & decor level 3 convenience package w/o individual front seat & power mirror
Dlis fuse 35 2a
Driver window switch
Electronic 4x4 & auto 4x4
Engine control module (ecm)
Except 4.3l
Except comfort & decor level 3 convenience package w/o individual front seat & power mirror
Except electronic 4x4 & auto 4x4
From lbec 1 fuse 64 (diagram 3 of 6)
From underhood fuse block (diagram 3 of 6)
Ign
Ignition switch
Inflatable restraint steering wheel module coil
J104 (in engine harness, 5 cm from engine control module connector breakout)
J212 (in steering column harness)
J231
Left i/p j/b (lower left side of dash)
Left steering wheel control switch
Nca
Off
Passenger window switch
Pnk
Rear sliding window switch (if equipped)
Right i/p j/b (in right end of dash)
Right i/p j/b (in right end of x2 dash)
Right steering wheel control switch
Run
Start
Sunroof control module (if equipped)
Theft deterrent module (tdm)
To mobile radio fuse block (diagram 1 of 6)
To run/crnk relay (diagram 5 of 6)
To underhood fuse block (diagram 5 of 6)
Transfer case shift control module
Transfer case shift control switch
Transmission control module (tcm)
Underhood fuse block (left side of engine compt)
W/ 10 series
W/ 10 series, auto 4x4 & electronic 4x4
W/ 4 speed, accessory steering wheel & automatic electronic cruise control
W/ 6 speed
W/ accessory steering wheel & automatic electronic cruise control
W/ accessory steering wheel control
W/ power window
W/0 10 series, auto 4x4 & electronic 4x4
W/o accessory steering wheel & automatic electronic cruise control
W/o accessory steering wheel control
X14
X201

4.8L VIN C, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500

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List of elements for 4.8L VIN C, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500:

(in fuse block jumper harness) j220
(not used)
4-speed a/t
4wd & 2 speed manual shift control transfer case
6-speed a/t
7.5a
A/c cmprsr relay
Air bag ign fuse 40 10a
Automatic transmission
Aux hvac- ign fuse 48 10a
Bck/up lamp pcb relay
Chmsl pcb relay
Drl pcb relay
Ecm-ign fuse 56 15a
Engine control module (ecm)
Except 4wd & 2 speed manual shift control transfer case
Fog lamp relay
From body control module (diagram 4 of 6)
From dlis fuse 35 (diagram 4 of 6)
Front drive axle actuator
Frt wash pcb relay
Frt wpr fuse 36 25a
Fuel pmp relay
Fuel system control module (fscm)
G107 (4.3l) g102 (except 4.3l) (4.3l: top left rear of engine) (except 4.3l: on lower left front of engine)
Hdlp lo/hid relay
Heated steering fuse
Heated steering wheel control module
Hi beam pcb relay
Horn pcb relay
Hvac-ign fuse 55 10a
Inflatable restraint i/p module disable switch (if equipped)
Inflatable restraint passenger air bag on/off indicator (if equipped)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint steering wheel module coil
Inside rearview mirror (isrvm)
Instrument panel cluster (ipc)
J105
J130 (in engine harness)
L/gate pcb relay
Left air temperature actuator (automatic a/c)
Left i/p j/b (lower left x9
Misc ing fuse 43 10a
Mode actuator
Nca
Park lamp relay
Pnk
Rear defog relay
Rear wash pcb relay
Recirculation actuator
Red
Right air temperature actuator (automatic a/c) air temperature actuator (manual a/c)
Right i/p j/b (in right end of dash)
Run/ crnk relay
Secondary fuel pump relay (6.0l (vin k) w/o auxiliary fuel tank)
Seo/alc fuse 54 10a
Side of dash)
Stop lamp switch
Strtr relay
To fan 1 fuse 57 (diagram 6 of 6)
Trailer brake control module (if equipped)
Trans ign 1 fuse 19 15a
Transfer case shift control module
Transmission control module (tcm)
Trlr lt stop/turn pcb relay
Trlr rt stop/turn pcb relay
Underhood fuse block (left side of engine compt)
W/ auto 4x4 & electronic 4x4
W/ steering wheel heater
W/o 4.3l, 5.3l (vin o), 6.0l (vin k) & 5.3l (vin 3)
W/o steering wheel heater
Wiper control pcb relay
Wiper speed pcb relay
X1 left i/p j/b (lower left x9
X11
X12
X14
X175

4.8L VIN C, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500

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List of elements for 4.8L VIN C, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500:

(in ignition coil jumper harness, between ignition coils 4 & 2) j110
(in ignition coil jumper harness, between ignition coils 5 & 7) j107
(in spo theft harness) j227
(not used)
4.3l
Auxiliary battery
Central sequential fuel injection (central sfi)
Eap fuse 38 15a
Ecm/throt cont fuse 5 15a
Electronic adjustable pedals pcb relay
Eng fuse 4 15a
Engine control module (ecm)
Evaporative emission (evap) canister purge solenoid valve
Except 4.3l
Fan cntrl relay
Fan hi relay
Fan lo relay
Fan-1 fuse 57 40a
Fan-2 fuse 60 40a
From frt wpr p fuse 36 (diagram 5 of 6)
Fuel injector
Heated oxygen sensor (ho2s) bank 1 sensor 1
Heated oxygen sensor (ho2s) bank 1 sensor 2
Heated oxygen sensor (ho2s) bank 2 sensor 1
Heated oxygen sensor (ho2s) bank 2 sensor 2
Ignition coil/ module
Ignition control module (icm)
Inj-a fuse 24 20a
Inj-b fuse 13 (except 4.3l) 20a
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
O2-a snsr fuse 18 10a
O2-b snsr fuse 8 10a
Park enable pcb relay
Pnk
Pnk (in engine harness) j128
Power take off (pto) module (if equipped)
Pwr/ trn relay
Security indicator lamp
Seo b1 fuse 52 15a
Spo alarm
To auxiliary battery run relay (diagram 1 of 6)
Underhood fuse block (left side of engine compt)
Valve lifter oil manifold (vlom) assembly (5.3l, 6.0l & 6.2l)
Vehicle inclination sensor
Vehicle shock sensor
W/ comfort & decor level 3 convenience package & luxury
X14
X2 left i/p j/b (lower left side of dash)

5.3L VIN 0

5.3L VIN 0, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 0, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500:

(in fuse block jumper harness) j210
(in fuse block jumper harness) j211
(in fuse block jumper harness) j224
(in roof console) emergency vehicle roof lamp relay
(info not available)
(not used)
(on lower left front of engine) (except 4.3l) g102
175a
4 speed a/t
6 speed a/t
6.0l (vin k)
6a6
Auto 4x4
Automatic a/c
Auxiliary battery relay (if equipped) (rear of x1 engine compt)
Auxiliary battery run relay
Body builder emergency lamp
Body control module (bcm)
Data link connector (dlc)
Ecm- batt fuse 12 10a
Electronic 4x4 & auto 4x4
Engine control module (ecm)
Evaporative emission (evap) canister vent solenoid valve
From left i/p j/b (diagram 4 of 6)
From underhood fuse block (diagram 6 of 6)
Fuse a 30a
Fuse b 30a
Fuse c 30a
Fuse d 30a
Fuse holder (right side of firewall)
G103 (on front of right cylinder head)
G107 (4.3l) (top left rear of engine)
G200 (on right front corner of hvac module)
Generator
Hdlp wash fuse 22 20a
Hvac batt fuse 39 10a
Hvac control module
I/p 1 accessory power outlet
Instrument panel cluster (ipc)
Ipc fuse 46 10a
Itbc fuse 6 15a
J145
J200
J209 (in fuse block jumper harness)
J219
Left battery
Left i/p j/b (lower left x2
Ltr fuse 53 20a
Manual a/c
Mega fuse (right rear of engine compt)
Mega fuse 125a
Mega fuse 175a
Mega fuse 60a
Nca
Red
Relay a
Relay b
Right battery
Right i/p j/b (in right end of dash)
Seo b2 fuse 37 30a
Side of dash)
Starter
Stud 2 fuse 63 30a
Tcm-batt fuse 14 15a
To roof beacon switch (diagram 2 of 6)
To stud 1 fuse 68 (diagram 2 of 6)
To underhood fuse block (diagram 2 of 6)
To underhood fuse block (diagram 3 of 6)
Trailer brake control module (if equipped)
Trailer brake control relay (if equipped)
Transfer case encoder motor
Transfer case shift control module
Transmission control module (tcm)
Trec fuse 67 30a
Underhood fuse block (left side of engine compt)
W/ auxiliary battery
W/ emergency vehicle roof lamp relay
W/ wrecker emergency lamp provisions
W/ wrecker relay
Windshield washer solvent heater (if equipped)
Wrecker relay
Wsw/htr fuse 66 60a
X14

5.3L VIN 0, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 0, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500:

(in camper harness) j414
(in sliding rear window jumper harness) j336
(not used)
(w/ individual front seat) j315
Abs-1 fuse 61 40a
Abs-2 fuse 9 25a
Bcm fuse 10a
Blower motor control module
Body control module (bcm)
Comfort & decor level 3 convenience package
Cooled seats fuse 30a
Ctsy fuse 15a
Ddm fuse 15a
Dim fuse 15a
Driver door lock/ window switch
Driver power seat adjuster
Driver seat 2 circuit breaker cb3 25a
Driver seat adjuster switch
Driver window switch
Dsm fuse 10a
Elec run board fuse 65 30a
Electronic brake control module (ebcm)
Except 4.3l, 5.3l (vin o), 6.0l & 5.3l (vin 3)
From fusible link 3 (diagram 1 of 6)
From ipc f fuse 46 (diagram 1 of 6)
From pdm fuse (diagram 3 of 6)
From right i/p j/b (diagram 1 of 6)
Front seat
Fscm fuse 21 20a
Fuel system control module (fscm)
G200 (on right front corner of hvac module)
Heavy duty abs fuse 59 60a
Hvac blwr fuse 70 40a
Hydraulic power brake control
I/p fuse block (left side of dash)
J323
Lbec 2 fuse 72 60a
Left i/p j/b (lower left side of dash)
Left i/p j/b (lower left side x1
Left rear window switch
Lt dr circuit breaker 25a
Mbec 1 fuse 69 60a
Memory seat module (msm)
Obs det fuse 10a
Of dash)
Outside rearview mirror switch
Pass seat 1 circuit breaker cb2 25a
Passenger door lock/ window switch
Passenger power seat adjuster
Passenger seat adjuster switch
Passenger seat lumbar switch
Passenger window switch
Pwr mir fuse 2a
Pwr rear wndw circuit breaker cb4 25a
Rear hvac fuse 30a
Rear object sensor control module (w/ rear parking assist)
Rear seat fuse 20a
Rear wpr fuse 25a
Red
Remote control door lock receiver (rcdlr)
Right i/p j/b (in right end of x3 dash)
Right i/p j/b (in right end of x6 dash)
Right rear window switch
Roof beacon relay (in overhead console)
Roof beacon switch
Rt doors circuit breaker cb1 25a
Rt stop trn fuse 15a
S/roof fuse 34 30a
Sliding rear window close relay
Sliding rear window open relay
Stud 1 fuse 68 (auxiliary battery) 40a
Sunroof module
To lgm fuse 71 (diagram 3 of 6)
Trailer connector
Underhood fuse block (left side of engine compt)
W/ active & vacuum power brake control
W/ comfort & decor level 3 convenience package
W/ electrical alarm bulb & camper trailer provision
W/ electrical alarm bulb & w/o camper trailer provision
W/ individual
W/ individual front seat
W/ individual front seat & power mirror
W/ power window
W/ restraint system
W/ roof beacon relay
W/ sunroof
W/ truck trailer hd wiring harness
W/ wrecker & emergency vehicle roof lamp relay
W/o comfort & decor level 3 convenience package
W/o individual
W/o individual front seat
W/o individual front seat & power mirror
X10
X11
X12

5.3L VIN 0, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 0, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500:

(in pto jumper harness) (w/ power take off) j127
(lower left side of dash) left i/p j/b
(not used)
2a1
Air bag batt fuse 45 15a
Alc/comp fuse 58 40a
Amp fuse 41 30a
Audio amplifier (premium audio branded w/ amplifier speaker system)
Automatic a/c
Aux pwr 2 fuse 20a
Aux pwr fuse 20a
Body control module (bcm)
Center console accessory power outlet
Center console compartment accessory power outlet
Center seat accessory power outlet
Chime module
Comfort & decor level 3 convenience package
Crew cab w/ individual front seat
Digital radio receiver (if equipped)
Enhanced audio
Esc/alc exh fuse 2 30a
Exp/pto fuse 47 15a
From auxiliary battery run relay (diagram 1 of 6)
From fscm fuse 21 (diagram 2 of 6)
G200 (on right front corner of hvac module)
G304 (on lower right "b" pillar)
Garage door opener (gdo)
Hvac control module
I/p 2 accessory power outlet
I/p fuse block (left side of dash)
Inflatable restraint passenger presence system (pps) module (if equipped)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint vehicle rollover sensor
Info fuse 10a
Is lps fuse 10a
J200
J203
J304
Lbec 1 fuse 64 60a
Left i/p j/b (lower left side of dash)
Left i/p j/b (lower left side x10
Lgm fuse 71 30a
Lock pcb relay
Lock/unlock pcb relay
Lt stop trn fuse 15a
Luxury edition
Manual a/c
Merchandised package
Nca
Of dash)
Passenger door lock/ window switch
Pdm fuse (w/ comfort & decor level 3 convenience package & luxury) 15a
Performance
Power locks w/o individual front seat & power mirror
Power take off (pto) relay
Premium audio branded
Radio
Rdo fuse 42 15a
Rear seat audio (rsa) control (if equipped)
Rear seat ent fuse 5a
Right i/p j/b (in right end of dash)
Right i/p j/b (in right end of x2 dash)
Stop lamps fuse 15a
To body control module (diagram 4 of 6)
To dlis fuse 35 (diagram 4 of 6)
To left i/p block (diagram 2 of 6)
To lt dr circuit breaker (diagram 2 of 6)
Underhood fuse block (left side of engine compt)
Unlock pcb relay
Vehicle communication interface module (vcim)
Video display
W/ amplifier speaker system
W/ az3
W/ custom console front compt floor
W/ head curtain air bag
W/ individual front seat & power mirror
W/ luxury
W/ rear seat entertain- ment package
W/ universal garage door opener
W/ wrecker, emergency vehicle roof lamp & roof beacon relay
W/o luxury
W/o radio
Windshield washer solvent heater (if equipped)
X11

5.3L VIN 0, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 0, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500:

(if equipped) windshield outside moisture sensor
(in instrument panel harness, in transfer case shift control module connector breakout) j207
(in the steering column harness) j216
(not used)
12v
2a1
2a4
4 speed a/t
4.3l
6 speed a/t
Acc
Acc volt
Automatic transmission manual shift switch
Automatic transmission shift lever
Body control module (bcm)
Column harness) j213
Comfort & decor level 3 convenience package w/o individual front seat & power mirror
Dlis fuse 35 2a
Driver window switch
Electronic 4x4 & auto 4x4
Engine control module (ecm)
Except 4.3l
Except comfort & decor level 3 convenience package w/o individual front seat & power mirror
Except electronic 4x4 & auto 4x4
From lbec 1 fuse 64 (diagram 3 of 6)
From underhood fuse block (diagram 3 of 6)
Ign
Ignition switch
Inflatable restraint steering wheel module coil
J104 (in engine harness, 5 cm from engine control module connector breakout)
J212 (in steering column harness)
J231
Left i/p j/b (lower left side of dash)
Left steering wheel control switch
Nca
Off
Passenger window switch
Pnk
Rear sliding window switch (if equipped)
Right i/p j/b (in right end of dash)
Right i/p j/b (in right end of x2 dash)
Right steering wheel control switch
Run
Start
Sunroof control module (if equipped)
Theft deterrent module (tdm)
To mobile radio fuse block (diagram 1 of 6)
To run/crnk relay (diagram 5 of 6)
To underhood fuse block (diagram 5 of 6)
Transfer case shift control module
Transfer case shift control switch
Transmission control module (tcm)
Underhood fuse block (left side of engine compt)
W/ 10 series
W/ 10 series, auto 4x4 & electronic 4x4
W/ 4 speed, accessory steering wheel & automatic electronic cruise control
W/ 6 speed
W/ accessory steering wheel & automatic electronic cruise control
W/ accessory steering wheel control
W/ power window
W/0 10 series, auto 4x4 & electronic 4x4
W/o accessory steering wheel & automatic electronic cruise control
W/o accessory steering wheel control
X14
X201

5.3L VIN 0, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 0, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500:

(in fuse block jumper harness) j220
(not used)
4-speed a/t
4wd & 2 speed manual shift control transfer case
6-speed a/t
7.5a
A/c cmprsr relay
Air bag ign fuse 40 10a
Automatic transmission
Aux hvac- ign fuse 48 10a
Bck/up lamp pcb relay
Chmsl pcb relay
Drl pcb relay
Ecm-ign fuse 56 15a
Engine control module (ecm)
Except 4wd & 2 speed manual shift control transfer case
Fog lamp relay
From body control module (diagram 4 of 6)
From dlis fuse 35 (diagram 4 of 6)
Front drive axle actuator
Frt wash pcb relay
Frt wpr fuse 36 25a
Fuel pmp relay
Fuel system control module (fscm)
G107 (4.3l) g102 (except 4.3l) (4.3l: top left rear of engine) (except 4.3l: on lower left front of engine)
Hdlp lo/hid relay
Heated steering fuse
Heated steering wheel control module
Hi beam pcb relay
Horn pcb relay
Hvac-ign fuse 55 10a
Inflatable restraint i/p module disable switch (if equipped)
Inflatable restraint passenger air bag on/off indicator (if equipped)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint steering wheel module coil
Inside rearview mirror (isrvm)
Instrument panel cluster (ipc)
J105
J130 (in engine harness)
L/gate pcb relay
Left air temperature actuator (automatic a/c)
Left i/p j/b (lower left x9
Misc ing fuse 43 10a
Mode actuator
Nca
Park lamp relay
Pnk
Rear defog relay
Rear wash pcb relay
Recirculation actuator
Red
Right air temperature actuator (automatic a/c) air temperature actuator (manual a/c)
Right i/p j/b (in right end of dash)
Run/ crnk relay
Secondary fuel pump relay (6.0l (vin k) w/o auxiliary fuel tank)
Seo/alc fuse 54 10a
Side of dash)
Stop lamp switch
Strtr relay
To fan 1 fuse 57 (diagram 6 of 6)
Trailer brake control module (if equipped)
Trans ign 1 fuse 19 15a
Transfer case shift control module
Transmission control module (tcm)
Trlr lt stop/turn pcb relay
Trlr rt stop/turn pcb relay
Underhood fuse block (left side of engine compt)
W/ auto 4x4 & electronic 4x4
W/ steering wheel heater
W/o 4.3l, 5.3l (vin o), 6.0l (vin k) & 5.3l (vin 3)
W/o steering wheel heater
Wiper control pcb relay
Wiper speed pcb relay
X1 left i/p j/b (lower left x9
X11
X12
X14
X175

5.3L VIN 0, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 0, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500:

(in ignition coil jumper harness, between ignition coils 4 & 2) j110
(in ignition coil jumper harness, between ignition coils 5 & 7) j107
(in spo theft harness) j227
(not used)
4.3l
Auxiliary battery
Central sequential fuel injection (central sfi)
Eap fuse 38 15a
Ecm/throt cont fuse 5 15a
Electronic adjustable pedals pcb relay
Eng fuse 4 15a
Engine control module (ecm)
Evaporative emission (evap) canister purge solenoid valve
Except 4.3l
Fan cntrl relay
Fan hi relay
Fan lo relay
Fan-1 fuse 57 40a
Fan-2 fuse 60 40a
From frt wpr p fuse 36 (diagram 5 of 6)
Fuel injector
Heated oxygen sensor (ho2s) bank 1 sensor 1
Heated oxygen sensor (ho2s) bank 1 sensor 2
Heated oxygen sensor (ho2s) bank 2 sensor 1
Heated oxygen sensor (ho2s) bank 2 sensor 2
Ignition coil/ module
Ignition control module (icm)
Inj-a fuse 24 20a
Inj-b fuse 13 (except 4.3l) 20a
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
O2-a snsr fuse 18 10a
O2-b snsr fuse 8 10a
Park enable pcb relay
Pnk
Pnk (in engine harness) j128
Power take off (pto) module (if equipped)
Pwr/ trn relay
Security indicator lamp
Seo b1 fuse 52 15a
Spo alarm
To auxiliary battery run relay (diagram 1 of 6)
Underhood fuse block (left side of engine compt)
Valve lifter oil manifold (vlom) assembly (5.3l, 6.0l & 6.2l)
Vehicle inclination sensor
Vehicle shock sensor
W/ comfort & decor level 3 convenience package & luxury
X14
X2 left i/p j/b (lower left side of dash)

5.3L VIN 3

5.3L VIN 3, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 3, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500:

(in fuse block jumper harness) j210
(in fuse block jumper harness) j211
(in fuse block jumper harness) j224
(in roof console) emergency vehicle roof lamp relay
(info not available)
(not used)
(on lower left front of engine) (except 4.3l) g102
175a
4 speed a/t
6 speed a/t
6.0l (vin k)
6a6
Auto 4x4
Automatic a/c
Auxiliary battery relay (if equipped) (rear of x1 engine compt)
Auxiliary battery run relay
Body builder emergency lamp
Body control module (bcm)
Data link connector (dlc)
Ecm- batt fuse 12 10a
Electronic 4x4 & auto 4x4
Engine control module (ecm)
Evaporative emission (evap) canister vent solenoid valve
From left i/p j/b (diagram 4 of 6)
From underhood fuse block (diagram 6 of 6)
Fuse a 30a
Fuse b 30a
Fuse c 30a
Fuse d 30a
Fuse holder (right side of firewall)
G103 (on front of right cylinder head)
G107 (4.3l) (top left rear of engine)
G200 (on right front corner of hvac module)
Generator
Hdlp wash fuse 22 20a
Hvac batt fuse 39 10a
Hvac control module
I/p 1 accessory power outlet
Instrument panel cluster (ipc)
Ipc fuse 46 10a
Itbc fuse 6 15a
J145
J200
J209 (in fuse block jumper harness)
J219
Left battery
Left i/p j/b (lower left x2
Ltr fuse 53 20a
Manual a/c
Mega fuse (right rear of engine compt)
Mega fuse 125a
Mega fuse 175a
Mega fuse 60a
Nca
Red
Relay a
Relay b
Right battery
Right i/p j/b (in right end of dash)
Seo b2 fuse 37 30a
Side of dash)
Starter
Stud 2 fuse 63 30a
Tcm-batt fuse 14 15a
To roof beacon switch (diagram 2 of 6)
To stud 1 fuse 68 (diagram 2 of 6)
To underhood fuse block (diagram 2 of 6)
To underhood fuse block (diagram 3 of 6)
Trailer brake control module (if equipped)
Trailer brake control relay (if equipped)
Transfer case encoder motor
Transfer case shift control module
Transmission control module (tcm)
Trec fuse 67 30a
Underhood fuse block (left side of engine compt)
W/ auxiliary battery
W/ emergency vehicle roof lamp relay
W/ wrecker emergency lamp provisions
W/ wrecker relay
Windshield washer solvent heater (if equipped)
Wrecker relay
Wsw/htr fuse 66 60a
X14

5.3L VIN 3, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 3, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500:

(in camper harness) j414
(in sliding rear window jumper harness) j336
(not used)
(w/ individual front seat) j315
Abs-1 fuse 61 40a
Abs-2 fuse 9 25a
Bcm fuse 10a
Blower motor control module
Body control module (bcm)
Comfort & decor level 3 convenience package
Cooled seats fuse 30a
Ctsy fuse 15a
Ddm fuse 15a
Dim fuse 15a
Driver door lock/ window switch
Driver power seat adjuster
Driver seat 2 circuit breaker cb3 25a
Driver seat adjuster switch
Driver window switch
Dsm fuse 10a
Elec run board fuse 65 30a
Electronic brake control module (ebcm)
Except 4.3l, 5.3l (vin o), 6.0l & 5.3l (vin 3)
From fusible link 3 (diagram 1 of 6)
From ipc f fuse 46 (diagram 1 of 6)
From pdm fuse (diagram 3 of 6)
From right i/p j/b (diagram 1 of 6)
Front seat
Fscm fuse 21 20a
Fuel system control module (fscm)
G200 (on right front corner of hvac module)
Heavy duty abs fuse 59 60a
Hvac blwr fuse 70 40a
Hydraulic power brake control
I/p fuse block (left side of dash)
J323
Lbec 2 fuse 72 60a
Left i/p j/b (lower left side of dash)
Left i/p j/b (lower left side x1
Left rear window switch
Lt dr circuit breaker 25a
Mbec 1 fuse 69 60a
Memory seat module (msm)
Obs det fuse 10a
Of dash)
Outside rearview mirror switch
Pass seat 1 circuit breaker cb2 25a
Passenger door lock/ window switch
Passenger power seat adjuster
Passenger seat adjuster switch
Passenger seat lumbar switch
Passenger window switch
Pwr mir fuse 2a
Pwr rear wndw circuit breaker cb4 25a
Rear hvac fuse 30a
Rear object sensor control module (w/ rear parking assist)
Rear seat fuse 20a
Rear wpr fuse 25a
Red
Remote control door lock receiver (rcdlr)
Right i/p j/b (in right end of x3 dash)
Right i/p j/b (in right end of x6 dash)
Right rear window switch
Roof beacon relay (in overhead console)
Roof beacon switch
Rt doors circuit breaker cb1 25a
Rt stop trn fuse 15a
S/roof fuse 34 30a
Sliding rear window close relay
Sliding rear window open relay
Stud 1 fuse 68 (auxiliary battery) 40a
Sunroof module
To lgm fuse 71 (diagram 3 of 6)
Trailer connector
Underhood fuse block (left side of engine compt)
W/ active & vacuum power brake control
W/ comfort & decor level 3 convenience package
W/ electrical alarm bulb & camper trailer provision
W/ electrical alarm bulb & w/o camper trailer provision
W/ individual
W/ individual front seat
W/ individual front seat & power mirror
W/ power window
W/ restraint system
W/ roof beacon relay
W/ sunroof
W/ truck trailer hd wiring harness
W/ wrecker & emergency vehicle roof lamp relay
W/o comfort & decor level 3 convenience package
W/o individual
W/o individual front seat
W/o individual front seat & power mirror
X10
X11
X12

5.3L VIN 3, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 3, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500:

(in pto jumper harness) (w/ power take off) j127
(lower left side of dash) left i/p j/b
(not used)
2a1
Air bag batt fuse 45 15a
Alc/comp fuse 58 40a
Amp fuse 41 30a
Audio amplifier (premium audio branded w/ amplifier speaker system)
Automatic a/c
Aux pwr 2 fuse 20a
Aux pwr fuse 20a
Body control module (bcm)
Center console accessory power outlet
Center console compartment accessory power outlet
Center seat accessory power outlet
Chime module
Comfort & decor level 3 convenience package
Crew cab w/ individual front seat
Digital radio receiver (if equipped)
Enhanced audio
Esc/alc exh fuse 2 30a
Exp/pto fuse 47 15a
From auxiliary battery run relay (diagram 1 of 6)
From fscm fuse 21 (diagram 2 of 6)
G200 (on right front corner of hvac module)
G304 (on lower right "b" pillar)
Garage door opener (gdo)
Hvac control module
I/p 2 accessory power outlet
I/p fuse block (left side of dash)
Inflatable restraint passenger presence system (pps) module (if equipped)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint vehicle rollover sensor
Info fuse 10a
Is lps fuse 10a
J200
J203
J304
Lbec 1 fuse 64 60a
Left i/p j/b (lower left side of dash)
Left i/p j/b (lower left side x10
Lgm fuse 71 30a
Lock pcb relay
Lock/unlock pcb relay
Lt stop trn fuse 15a
Luxury edition
Manual a/c
Merchandised package
Nca
Of dash)
Passenger door lock/ window switch
Pdm fuse (w/ comfort & decor level 3 convenience package & luxury) 15a
Performance
Power locks w/o individual front seat & power mirror
Power take off (pto) relay
Premium audio branded
Radio
Rdo fuse 42 15a
Rear seat audio (rsa) control (if equipped)
Rear seat ent fuse 5a
Right i/p j/b (in right end of dash)
Right i/p j/b (in right end of x2 dash)
Stop lamps fuse 15a
To body control module (diagram 4 of 6)
To dlis fuse 35 (diagram 4 of 6)
To left i/p block (diagram 2 of 6)
To lt dr circuit breaker (diagram 2 of 6)
Underhood fuse block (left side of engine compt)
Unlock pcb relay
Vehicle communication interface module (vcim)
Video display
W/ amplifier speaker system
W/ az3
W/ custom console front compt floor
W/ head curtain air bag
W/ individual front seat & power mirror
W/ luxury
W/ rear seat entertain- ment package
W/ universal garage door opener
W/ wrecker, emergency vehicle roof lamp & roof beacon relay
W/o luxury
W/o radio
Windshield washer solvent heater (if equipped)
X11

5.3L VIN 3, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 3, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500:

(if equipped) windshield outside moisture sensor
(in instrument panel harness, in transfer case shift control module connector breakout) j207
(in the steering column harness) j216
(not used)
12v
2a1
2a4
4 speed a/t
4.3l
6 speed a/t
Acc
Acc volt
Automatic transmission manual shift switch
Automatic transmission shift lever
Body control module (bcm)
Column harness) j213
Comfort & decor level 3 convenience package w/o individual front seat & power mirror
Dlis fuse 35 2a
Driver window switch
Electronic 4x4 & auto 4x4
Engine control module (ecm)
Except 4.3l
Except comfort & decor level 3 convenience package w/o individual front seat & power mirror
Except electronic 4x4 & auto 4x4
From lbec 1 fuse 64 (diagram 3 of 6)
From underhood fuse block (diagram 3 of 6)
Ign
Ignition switch
Inflatable restraint steering wheel module coil
J104 (in engine harness, 5 cm from engine control module connector breakout)
J212 (in steering column harness)
J231
Left i/p j/b (lower left side of dash)
Left steering wheel control switch
Nca
Off
Passenger window switch
Pnk
Rear sliding window switch (if equipped)
Right i/p j/b (in right end of dash)
Right i/p j/b (in right end of x2 dash)
Right steering wheel control switch
Run
Start
Sunroof control module (if equipped)
Theft deterrent module (tdm)
To mobile radio fuse block (diagram 1 of 6)
To run/crnk relay (diagram 5 of 6)
To underhood fuse block (diagram 5 of 6)
Transfer case shift control module
Transfer case shift control switch
Transmission control module (tcm)
Underhood fuse block (left side of engine compt)
W/ 10 series
W/ 10 series, auto 4x4 & electronic 4x4
W/ 4 speed, accessory steering wheel & automatic electronic cruise control
W/ 6 speed
W/ accessory steering wheel & automatic electronic cruise control
W/ accessory steering wheel control
W/ power window
W/0 10 series, auto 4x4 & electronic 4x4
W/o accessory steering wheel & automatic electronic cruise control
W/o accessory steering wheel control
X14
X201

5.3L VIN 3, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 3, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500:

(in fuse block jumper harness) j220
(not used)
4-speed a/t
4wd & 2 speed manual shift control transfer case
6-speed a/t
7.5a
A/c cmprsr relay
Air bag ign fuse 40 10a
Automatic transmission
Aux hvac- ign fuse 48 10a
Bck/up lamp pcb relay
Chmsl pcb relay
Drl pcb relay
Ecm-ign fuse 56 15a
Engine control module (ecm)
Except 4wd & 2 speed manual shift control transfer case
Fog lamp relay
From body control module (diagram 4 of 6)
From dlis fuse 35 (diagram 4 of 6)
Front drive axle actuator
Frt wash pcb relay
Frt wpr fuse 36 25a
Fuel pmp relay
Fuel system control module (fscm)
G107 (4.3l) g102 (except 4.3l) (4.3l: top left rear of engine) (except 4.3l: on lower left front of engine)
Hdlp lo/hid relay
Heated steering fuse
Heated steering wheel control module
Hi beam pcb relay
Horn pcb relay
Hvac-ign fuse 55 10a
Inflatable restraint i/p module disable switch (if equipped)
Inflatable restraint passenger air bag on/off indicator (if equipped)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint steering wheel module coil
Inside rearview mirror (isrvm)
Instrument panel cluster (ipc)
J105
J130 (in engine harness)
L/gate pcb relay
Left air temperature actuator (automatic a/c)
Left i/p j/b (lower left x9
Misc ing fuse 43 10a
Mode actuator
Nca
Park lamp relay
Pnk
Rear defog relay
Rear wash pcb relay
Recirculation actuator
Red
Right air temperature actuator (automatic a/c) air temperature actuator (manual a/c)
Right i/p j/b (in right end of dash)
Run/ crnk relay
Secondary fuel pump relay (6.0l (vin k) w/o auxiliary fuel tank)
Seo/alc fuse 54 10a
Side of dash)
Stop lamp switch
Strtr relay
To fan 1 fuse 57 (diagram 6 of 6)
Trailer brake control module (if equipped)
Trans ign 1 fuse 19 15a
Transfer case shift control module
Transmission control module (tcm)
Trlr lt stop/turn pcb relay
Trlr rt stop/turn pcb relay
Underhood fuse block (left side of engine compt)
W/ auto 4x4 & electronic 4x4
W/ steering wheel heater
W/o 4.3l, 5.3l (vin o), 6.0l (vin k) & 5.3l (vin 3)
W/o steering wheel heater
Wiper control pcb relay
Wiper speed pcb relay
X1 left i/p j/b (lower left x9
X11
X12
X14
X175

5.3L VIN 3, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 3, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500:

(in ignition coil jumper harness, between ignition coils 4 & 2) j110
(in ignition coil jumper harness, between ignition coils 5 & 7) j107
(in spo theft harness) j227
(not used)
4.3l
Auxiliary battery
Central sequential fuel injection (central sfi)
Eap fuse 38 15a
Ecm/throt cont fuse 5 15a
Electronic adjustable pedals pcb relay
Eng fuse 4 15a
Engine control module (ecm)
Evaporative emission (evap) canister purge solenoid valve
Except 4.3l
Fan cntrl relay
Fan hi relay
Fan lo relay
Fan-1 fuse 57 40a
Fan-2 fuse 60 40a
From frt wpr p fuse 36 (diagram 5 of 6)
Fuel injector
Heated oxygen sensor (ho2s) bank 1 sensor 1
Heated oxygen sensor (ho2s) bank 1 sensor 2
Heated oxygen sensor (ho2s) bank 2 sensor 1
Heated oxygen sensor (ho2s) bank 2 sensor 2
Ignition coil/ module
Ignition control module (icm)
Inj-a fuse 24 20a
Inj-b fuse 13 (except 4.3l) 20a
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
O2-a snsr fuse 18 10a
O2-b snsr fuse 8 10a
Park enable pcb relay
Pnk
Pnk (in engine harness) j128
Power take off (pto) module (if equipped)
Pwr/ trn relay
Security indicator lamp
Seo b1 fuse 52 15a
Spo alarm
To auxiliary battery run relay (diagram 1 of 6)
Underhood fuse block (left side of engine compt)
Valve lifter oil manifold (vlom) assembly (5.3l, 6.0l & 6.2l)
Vehicle inclination sensor
Vehicle shock sensor
W/ comfort & decor level 3 convenience package & luxury
X14
X2 left i/p j/b (lower left side of dash)

5.3L VIN J

5.3L VIN J, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN J, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500:

(in fuse block jumper harness) j210
(in fuse block jumper harness) j211
(in fuse block jumper harness) j224
(in roof console) emergency vehicle roof lamp relay
(info not available)
(not used)
(on lower left front of engine) (except 4.3l) g102
175a
4 speed a/t
6 speed a/t
6.0l (vin k)
6a6
Auto 4x4
Automatic a/c
Auxiliary battery relay (if equipped) (rear of x1 engine compt)
Auxiliary battery run relay
Body builder emergency lamp
Body control module (bcm)
Data link connector (dlc)
Ecm- batt fuse 12 10a
Electronic 4x4 & auto 4x4
Engine control module (ecm)
Evaporative emission (evap) canister vent solenoid valve
From left i/p j/b (diagram 4 of 6)
From underhood fuse block (diagram 6 of 6)
Fuse a 30a
Fuse b 30a
Fuse c 30a
Fuse d 30a
Fuse holder (right side of firewall)
G103 (on front of right cylinder head)
G107 (4.3l) (top left rear of engine)
G200 (on right front corner of hvac module)
Generator
Hdlp wash fuse 22 20a
Hvac batt fuse 39 10a
Hvac control module
I/p 1 accessory power outlet
Instrument panel cluster (ipc)
Ipc fuse 46 10a
Itbc fuse 6 15a
J145
J200
J209 (in fuse block jumper harness)
J219
Left battery
Left i/p j/b (lower left x2
Ltr fuse 53 20a
Manual a/c
Mega fuse (right rear of engine compt)
Mega fuse 125a
Mega fuse 175a
Mega fuse 60a
Nca
Red
Relay a
Relay b
Right battery
Right i/p j/b (in right end of dash)
Seo b2 fuse 37 30a
Side of dash)
Starter
Stud 2 fuse 63 30a
Tcm-batt fuse 14 15a
To roof beacon switch (diagram 2 of 6)
To stud 1 fuse 68 (diagram 2 of 6)
To underhood fuse block (diagram 2 of 6)
To underhood fuse block (diagram 3 of 6)
Trailer brake control module (if equipped)
Trailer brake control relay (if equipped)
Transfer case encoder motor
Transfer case shift control module
Transmission control module (tcm)
Trec fuse 67 30a
Underhood fuse block (left side of engine compt)
W/ auxiliary battery
W/ emergency vehicle roof lamp relay
W/ wrecker emergency lamp provisions
W/ wrecker relay
Windshield washer solvent heater (if equipped)
Wrecker relay
Wsw/htr fuse 66 60a
X14

5.3L VIN J, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN J, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500:

(in camper harness) j414
(in sliding rear window jumper harness) j336
(not used)
(w/ individual front seat) j315
Abs-1 fuse 61 40a
Abs-2 fuse 9 25a
Bcm fuse 10a
Blower motor control module
Body control module (bcm)
Comfort & decor level 3 convenience package
Cooled seats fuse 30a
Ctsy fuse 15a
Ddm fuse 15a
Dim fuse 15a
Driver door lock/ window switch
Driver power seat adjuster
Driver seat 2 circuit breaker cb3 25a
Driver seat adjuster switch
Driver window switch
Dsm fuse 10a
Elec run board fuse 65 30a
Electronic brake control module (ebcm)
Except 4.3l, 5.3l (vin o), 6.0l & 5.3l (vin 3)
From fusible link 3 (diagram 1 of 6)
From ipc f fuse 46 (diagram 1 of 6)
From pdm fuse (diagram 3 of 6)
From right i/p j/b (diagram 1 of 6)
Front seat
Fscm fuse 21 20a
Fuel system control module (fscm)
G200 (on right front corner of hvac module)
Heavy duty abs fuse 59 60a
Hvac blwr fuse 70 40a
Hydraulic power brake control
I/p fuse block (left side of dash)
J323
Lbec 2 fuse 72 60a
Left i/p j/b (lower left side of dash)
Left i/p j/b (lower left side x1
Left rear window switch
Lt dr circuit breaker 25a
Mbec 1 fuse 69 60a
Memory seat module (msm)
Obs det fuse 10a
Of dash)
Outside rearview mirror switch
Pass seat 1 circuit breaker cb2 25a
Passenger door lock/ window switch
Passenger power seat adjuster
Passenger seat adjuster switch
Passenger seat lumbar switch
Passenger window switch
Pwr mir fuse 2a
Pwr rear wndw circuit breaker cb4 25a
Rear hvac fuse 30a
Rear object sensor control module (w/ rear parking assist)
Rear seat fuse 20a
Rear wpr fuse 25a
Red
Remote control door lock receiver (rcdlr)
Right i/p j/b (in right end of x3 dash)
Right i/p j/b (in right end of x6 dash)
Right rear window switch
Roof beacon relay (in overhead console)
Roof beacon switch
Rt doors circuit breaker cb1 25a
Rt stop trn fuse 15a
S/roof fuse 34 30a
Sliding rear window close relay
Sliding rear window open relay
Stud 1 fuse 68 (auxiliary battery) 40a
Sunroof module
To lgm fuse 71 (diagram 3 of 6)
Trailer connector
Underhood fuse block (left side of engine compt)
W/ active & vacuum power brake control
W/ comfort & decor level 3 convenience package
W/ electrical alarm bulb & camper trailer provision
W/ electrical alarm bulb & w/o camper trailer provision
W/ individual
W/ individual front seat
W/ individual front seat & power mirror
W/ power window
W/ restraint system
W/ roof beacon relay
W/ sunroof
W/ truck trailer hd wiring harness
W/ wrecker & emergency vehicle roof lamp relay
W/o comfort & decor level 3 convenience package
W/o individual
W/o individual front seat
W/o individual front seat & power mirror
X10
X11
X12

5.3L VIN J, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN J, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500:

(in pto jumper harness) (w/ power take off) j127
(lower left side of dash) left i/p j/b
(not used)
2a1
Air bag batt fuse 45 15a
Alc/comp fuse 58 40a
Amp fuse 41 30a
Audio amplifier (premium audio branded w/ amplifier speaker system)
Automatic a/c
Aux pwr 2 fuse 20a
Aux pwr fuse 20a
Body control module (bcm)
Center console accessory power outlet
Center console compartment accessory power outlet
Center seat accessory power outlet
Chime module
Comfort & decor level 3 convenience package
Crew cab w/ individual front seat
Digital radio receiver (if equipped)
Enhanced audio
Esc/alc exh fuse 2 30a
Exp/pto fuse 47 15a
From auxiliary battery run relay (diagram 1 of 6)
From fscm fuse 21 (diagram 2 of 6)
G200 (on right front corner of hvac module)
G304 (on lower right "b" pillar)
Garage door opener (gdo)
Hvac control module
I/p 2 accessory power outlet
I/p fuse block (left side of dash)
Inflatable restraint passenger presence system (pps) module (if equipped)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint vehicle rollover sensor
Info fuse 10a
Is lps fuse 10a
J200
J203
J304
Lbec 1 fuse 64 60a
Left i/p j/b (lower left side of dash)
Left i/p j/b (lower left side x10
Lgm fuse 71 30a
Lock pcb relay
Lock/unlock pcb relay
Lt stop trn fuse 15a
Luxury edition
Manual a/c
Merchandised package
Nca
Of dash)
Passenger door lock/ window switch
Pdm fuse (w/ comfort & decor level 3 convenience package & luxury) 15a
Performance
Power locks w/o individual front seat & power mirror
Power take off (pto) relay
Premium audio branded
Radio
Rdo fuse 42 15a
Rear seat audio (rsa) control (if equipped)
Rear seat ent fuse 5a
Right i/p j/b (in right end of dash)
Right i/p j/b (in right end of x2 dash)
Stop lamps fuse 15a
To body control module (diagram 4 of 6)
To dlis fuse 35 (diagram 4 of 6)
To left i/p block (diagram 2 of 6)
To lt dr circuit breaker (diagram 2 of 6)
Underhood fuse block (left side of engine compt)
Unlock pcb relay
Vehicle communication interface module (vcim)
Video display
W/ amplifier speaker system
W/ az3
W/ custom console front compt floor
W/ head curtain air bag
W/ individual front seat & power mirror
W/ luxury
W/ rear seat entertain- ment package
W/ universal garage door opener
W/ wrecker, emergency vehicle roof lamp & roof beacon relay
W/o luxury
W/o radio
Windshield washer solvent heater (if equipped)
X11

5.3L VIN J, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN J, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500:

(if equipped) windshield outside moisture sensor
(in instrument panel harness, in transfer case shift control module connector breakout) j207
(in the steering column harness) j216
(not used)
12v
2a1
2a4
4 speed a/t
4.3l
6 speed a/t
Acc
Acc volt
Automatic transmission manual shift switch
Automatic transmission shift lever
Body control module (bcm)
Column harness) j213
Comfort & decor level 3 convenience package w/o individual front seat & power mirror
Dlis fuse 35 2a
Driver window switch
Electronic 4x4 & auto 4x4
Engine control module (ecm)
Except 4.3l
Except comfort & decor level 3 convenience package w/o individual front seat & power mirror
Except electronic 4x4 & auto 4x4
From lbec 1 fuse 64 (diagram 3 of 6)
From underhood fuse block (diagram 3 of 6)
Ign
Ignition switch
Inflatable restraint steering wheel module coil
J104 (in engine harness, 5 cm from engine control module connector breakout)
J212 (in steering column harness)
J231
Left i/p j/b (lower left side of dash)
Left steering wheel control switch
Nca
Off
Passenger window switch
Pnk
Rear sliding window switch (if equipped)
Right i/p j/b (in right end of dash)
Right i/p j/b (in right end of x2 dash)
Right steering wheel control switch
Run
Start
Sunroof control module (if equipped)
Theft deterrent module (tdm)
To mobile radio fuse block (diagram 1 of 6)
To run/crnk relay (diagram 5 of 6)
To underhood fuse block (diagram 5 of 6)
Transfer case shift control module
Transfer case shift control switch
Transmission control module (tcm)
Underhood fuse block (left side of engine compt)
W/ 10 series
W/ 10 series, auto 4x4 & electronic 4x4
W/ 4 speed, accessory steering wheel & automatic electronic cruise control
W/ 6 speed
W/ accessory steering wheel & automatic electronic cruise control
W/ accessory steering wheel control
W/ power window
W/0 10 series, auto 4x4 & electronic 4x4
W/o accessory steering wheel & automatic electronic cruise control
W/o accessory steering wheel control
X14
X201

5.3L VIN J, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN J, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500:

(in fuse block jumper harness) j220
(not used)
4-speed a/t
4wd & 2 speed manual shift control transfer case
6-speed a/t
7.5a
A/c cmprsr relay
Air bag ign fuse 40 10a
Automatic transmission
Aux hvac- ign fuse 48 10a
Bck/up lamp pcb relay
Chmsl pcb relay
Drl pcb relay
Ecm-ign fuse 56 15a
Engine control module (ecm)
Except 4wd & 2 speed manual shift control transfer case
Fog lamp relay
From body control module (diagram 4 of 6)
From dlis fuse 35 (diagram 4 of 6)
Front drive axle actuator
Frt wash pcb relay
Frt wpr fuse 36 25a
Fuel pmp relay
Fuel system control module (fscm)
G107 (4.3l) g102 (except 4.3l) (4.3l: top left rear of engine) (except 4.3l: on lower left front of engine)
Hdlp lo/hid relay
Heated steering fuse
Heated steering wheel control module
Hi beam pcb relay
Horn pcb relay
Hvac-ign fuse 55 10a
Inflatable restraint i/p module disable switch (if equipped)
Inflatable restraint passenger air bag on/off indicator (if equipped)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint steering wheel module coil
Inside rearview mirror (isrvm)
Instrument panel cluster (ipc)
J105
J130 (in engine harness)
L/gate pcb relay
Left air temperature actuator (automatic a/c)
Left i/p j/b (lower left x9
Misc ing fuse 43 10a
Mode actuator
Nca
Park lamp relay
Pnk
Rear defog relay
Rear wash pcb relay
Recirculation actuator
Red
Right air temperature actuator (automatic a/c) air temperature actuator (manual a/c)
Right i/p j/b (in right end of dash)
Run/ crnk relay
Secondary fuel pump relay (6.0l (vin k) w/o auxiliary fuel tank)
Seo/alc fuse 54 10a
Side of dash)
Stop lamp switch
Strtr relay
To fan 1 fuse 57 (diagram 6 of 6)
Trailer brake control module (if equipped)
Trans ign 1 fuse 19 15a
Transfer case shift control module
Transmission control module (tcm)
Trlr lt stop/turn pcb relay
Trlr rt stop/turn pcb relay
Underhood fuse block (left side of engine compt)
W/ auto 4x4 & electronic 4x4
W/ steering wheel heater
W/o 4.3l, 5.3l (vin o), 6.0l (vin k) & 5.3l (vin 3)
W/o steering wheel heater
Wiper control pcb relay
Wiper speed pcb relay
X1 left i/p j/b (lower left x9
X11
X12
X14
X175

5.3L VIN J, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN J, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500:

(in ignition coil jumper harness, between ignition coils 4 & 2) j110
(in ignition coil jumper harness, between ignition coils 5 & 7) j107
(in spo theft harness) j227
(not used)
4.3l
Auxiliary battery
Central sequential fuel injection (central sfi)
Eap fuse 38 15a
Ecm/throt cont fuse 5 15a
Electronic adjustable pedals pcb relay
Eng fuse 4 15a
Engine control module (ecm)
Evaporative emission (evap) canister purge solenoid valve
Except 4.3l
Fan cntrl relay
Fan hi relay
Fan lo relay
Fan-1 fuse 57 40a
Fan-2 fuse 60 40a
From frt wpr p fuse 36 (diagram 5 of 6)
Fuel injector
Heated oxygen sensor (ho2s) bank 1 sensor 1
Heated oxygen sensor (ho2s) bank 1 sensor 2
Heated oxygen sensor (ho2s) bank 2 sensor 1
Heated oxygen sensor (ho2s) bank 2 sensor 2
Ignition coil/ module
Ignition control module (icm)
Inj-a fuse 24 20a
Inj-b fuse 13 (except 4.3l) 20a
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
O2-a snsr fuse 18 10a
O2-b snsr fuse 8 10a
Park enable pcb relay
Pnk
Pnk (in engine harness) j128
Power take off (pto) module (if equipped)
Pwr/ trn relay
Security indicator lamp
Seo b1 fuse 52 15a
Spo alarm
To auxiliary battery run relay (diagram 1 of 6)
Underhood fuse block (left side of engine compt)
Valve lifter oil manifold (vlom) assembly (5.3l, 6.0l & 6.2l)
Vehicle inclination sensor
Vehicle shock sensor
W/ comfort & decor level 3 convenience package & luxury
X14
X2 left i/p j/b (lower left side of dash)

5.3L VIN M

5.3L VIN M, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN M, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500:

(in fuse block jumper harness) j210
(in fuse block jumper harness) j211
(in fuse block jumper harness) j224
(in roof console) emergency vehicle roof lamp relay
(info not available)
(not used)
(on lower left front of engine) (except 4.3l) g102
175a
4 speed a/t
6 speed a/t
6.0l (vin k)
6a6
Auto 4x4
Automatic a/c
Auxiliary battery relay (if equipped) (rear of x1 engine compt)
Auxiliary battery run relay
Body builder emergency lamp
Body control module (bcm)
Data link connector (dlc)
Ecm- batt fuse 12 10a
Electronic 4x4 & auto 4x4
Engine control module (ecm)
Evaporative emission (evap) canister vent solenoid valve
From left i/p j/b (diagram 4 of 6)
From underhood fuse block (diagram 6 of 6)
Fuse a 30a
Fuse b 30a
Fuse c 30a
Fuse d 30a
Fuse holder (right side of firewall)
G103 (on front of right cylinder head)
G107 (4.3l) (top left rear of engine)
G200 (on right front corner of hvac module)
Generator
Hdlp wash fuse 22 20a
Hvac batt fuse 39 10a
Hvac control module
I/p 1 accessory power outlet
Instrument panel cluster (ipc)
Ipc fuse 46 10a
Itbc fuse 6 15a
J145
J200
J209 (in fuse block jumper harness)
J219
Left battery
Left i/p j/b (lower left x2
Ltr fuse 53 20a
Manual a/c
Mega fuse (right rear of engine compt)
Mega fuse 125a
Mega fuse 175a
Mega fuse 60a
Nca
Red
Relay a
Relay b
Right battery
Right i/p j/b (in right end of dash)
Seo b2 fuse 37 30a
Side of dash)
Starter
Stud 2 fuse 63 30a
Tcm-batt fuse 14 15a
To roof beacon switch (diagram 2 of 6)
To stud 1 fuse 68 (diagram 2 of 6)
To underhood fuse block (diagram 2 of 6)
To underhood fuse block (diagram 3 of 6)
Trailer brake control module (if equipped)
Trailer brake control relay (if equipped)
Transfer case encoder motor
Transfer case shift control module
Transmission control module (tcm)
Trec fuse 67 30a
Underhood fuse block (left side of engine compt)
W/ auxiliary battery
W/ emergency vehicle roof lamp relay
W/ wrecker emergency lamp provisions
W/ wrecker relay
Windshield washer solvent heater (if equipped)
Wrecker relay
Wsw/htr fuse 66 60a
X14

5.3L VIN M, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for 5.3L VIN M, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500:

(in camper harness) j414
(in sliding rear window jumper harness) j336
(not used)
(w/ individual front seat) j315
Abs-1 fuse 61 40a
Abs-2 fuse 9 25a
Bcm fuse 10a
Blower motor control module
Body control module (bcm)
Comfort & decor level 3 convenience package
Cooled seats fuse 30a
Ctsy fuse 15a
Ddm fuse 15a
Dim fuse 15a
Driver door lock/ window switch
Driver power seat adjuster
Driver seat 2 circuit breaker cb3 25a
Driver seat adjuster switch
Driver window switch
Dsm fuse 10a
Elec run board fuse 65 30a
Electronic brake control module (ebcm)
Except 4.3l, 5.3l (vin o), 6.0l & 5.3l (vin 3)
From fusible link 3 (diagram 1 of 6)
From ipc f fuse 46 (diagram 1 of 6)
From pdm fuse (diagram 3 of 6)
From right i/p j/b (diagram 1 of 6)
Front seat
Fscm fuse 21 20a
Fuel system control module (fscm)
G200 (on right front corner of hvac module)
Heavy duty abs fuse 59 60a
Hvac blwr fuse 70 40a
Hydraulic power brake control
I/p fuse block (left side of dash)
J323
Lbec 2 fuse 72 60a
Left i/p j/b (lower left side of dash)
Left i/p j/b (lower left side x1
Left rear window switch
Lt dr circuit breaker 25a
Mbec 1 fuse 69 60a
Memory seat module (msm)
Obs det fuse 10a
Of dash)
Outside rearview mirror switch
Pass seat 1 circuit breaker cb2 25a
Passenger door lock/ window switch
Passenger power seat adjuster
Passenger seat adjuster switch
Passenger seat lumbar switch
Passenger window switch
Pwr mir fuse 2a
Pwr rear wndw circuit breaker cb4 25a
Rear hvac fuse 30a
Rear object sensor control module (w/ rear parking assist)
Rear seat fuse 20a
Rear wpr fuse 25a
Red
Remote control door lock receiver (rcdlr)
Right i/p j/b (in right end of x3 dash)
Right i/p j/b (in right end of x6 dash)
Right rear window switch
Roof beacon relay (in overhead console)
Roof beacon switch
Rt doors circuit breaker cb1 25a
Rt stop trn fuse 15a
S/roof fuse 34 30a
Sliding rear window close relay
Sliding rear window open relay
Stud 1 fuse 68 (auxiliary battery) 40a
Sunroof module
To lgm fuse 71 (diagram 3 of 6)
Trailer connector
Underhood fuse block (left side of engine compt)
W/ active & vacuum power brake control
W/ comfort & decor level 3 convenience package
W/ electrical alarm bulb & camper trailer provision
W/ electrical alarm bulb & w/o camper trailer provision
W/ individual
W/ individual front seat
W/ individual front seat & power mirror
W/ power window
W/ restraint system
W/ roof beacon relay
W/ sunroof
W/ truck trailer hd wiring harness
W/ wrecker & emergency vehicle roof lamp relay
W/o comfort & decor level 3 convenience package
W/o individual
W/o individual front seat
W/o individual front seat & power mirror
X10
X11
X12

5.3L VIN M, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for 5.3L VIN M, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500:

(in pto jumper harness) (w/ power take off) j127
(lower left side of dash) left i/p j/b
(not used)
2a1
Air bag batt fuse 45 15a
Alc/comp fuse 58 40a
Amp fuse 41 30a
Audio amplifier (premium audio branded w/ amplifier speaker system)
Automatic a/c
Aux pwr 2 fuse 20a
Aux pwr fuse 20a
Body control module (bcm)
Center console accessory power outlet
Center console compartment accessory power outlet
Center seat accessory power outlet
Chime module
Comfort & decor level 3 convenience package
Crew cab w/ individual front seat
Digital radio receiver (if equipped)
Enhanced audio
Esc/alc exh fuse 2 30a
Exp/pto fuse 47 15a
From auxiliary battery run relay (diagram 1 of 6)
From fscm fuse 21 (diagram 2 of 6)
G200 (on right front corner of hvac module)
G304 (on lower right "b" pillar)
Garage door opener (gdo)
Hvac control module
I/p 2 accessory power outlet
I/p fuse block (left side of dash)
Inflatable restraint passenger presence system (pps) module (if equipped)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint vehicle rollover sensor
Info fuse 10a
Is lps fuse 10a
J200
J203
J304
Lbec 1 fuse 64 60a
Left i/p j/b (lower left side of dash)
Left i/p j/b (lower left side x10
Lgm fuse 71 30a
Lock pcb relay
Lock/unlock pcb relay
Lt stop trn fuse 15a
Luxury edition
Manual a/c
Merchandised package
Nca
Of dash)
Passenger door lock/ window switch
Pdm fuse (w/ comfort & decor level 3 convenience package & luxury) 15a
Performance
Power locks w/o individual front seat & power mirror
Power take off (pto) relay
Premium audio branded
Radio
Rdo fuse 42 15a
Rear seat audio (rsa) control (if equipped)
Rear seat ent fuse 5a
Right i/p j/b (in right end of dash)
Right i/p j/b (in right end of x2 dash)
Stop lamps fuse 15a
To body control module (diagram 4 of 6)
To dlis fuse 35 (diagram 4 of 6)
To left i/p block (diagram 2 of 6)
To lt dr circuit breaker (diagram 2 of 6)
Underhood fuse block (left side of engine compt)
Unlock pcb relay
Vehicle communication interface module (vcim)
Video display
W/ amplifier speaker system
W/ az3
W/ custom console front compt floor
W/ head curtain air bag
W/ individual front seat & power mirror
W/ luxury
W/ rear seat entertain- ment package
W/ universal garage door opener
W/ wrecker, emergency vehicle roof lamp & roof beacon relay
W/o luxury
W/o radio
Windshield washer solvent heater (if equipped)
X11

5.3L VIN M, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for 5.3L VIN M, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500:

(if equipped) windshield outside moisture sensor
(in instrument panel harness, in transfer case shift control module connector breakout) j207
(in the steering column harness) j216
(not used)
12v
2a1
2a4
4 speed a/t
4.3l
6 speed a/t
Acc
Acc volt
Automatic transmission manual shift switch
Automatic transmission shift lever
Body control module (bcm)
Column harness) j213
Comfort & decor level 3 convenience package w/o individual front seat & power mirror
Dlis fuse 35 2a
Driver window switch
Electronic 4x4 & auto 4x4
Engine control module (ecm)
Except 4.3l
Except comfort & decor level 3 convenience package w/o individual front seat & power mirror
Except electronic 4x4 & auto 4x4
From lbec 1 fuse 64 (diagram 3 of 6)
From underhood fuse block (diagram 3 of 6)
Ign
Ignition switch
Inflatable restraint steering wheel module coil
J104 (in engine harness, 5 cm from engine control module connector breakout)
J212 (in steering column harness)
J231
Left i/p j/b (lower left side of dash)
Left steering wheel control switch
Nca
Off
Passenger window switch
Pnk
Rear sliding window switch (if equipped)
Right i/p j/b (in right end of dash)
Right i/p j/b (in right end of x2 dash)
Right steering wheel control switch
Run
Start
Sunroof control module (if equipped)
Theft deterrent module (tdm)
To mobile radio fuse block (diagram 1 of 6)
To run/crnk relay (diagram 5 of 6)
To underhood fuse block (diagram 5 of 6)
Transfer case shift control module
Transfer case shift control switch
Transmission control module (tcm)
Underhood fuse block (left side of engine compt)
W/ 10 series
W/ 10 series, auto 4x4 & electronic 4x4
W/ 4 speed, accessory steering wheel & automatic electronic cruise control
W/ 6 speed
W/ accessory steering wheel & automatic electronic cruise control
W/ accessory steering wheel control
W/ power window
W/0 10 series, auto 4x4 & electronic 4x4
W/o accessory steering wheel & automatic electronic cruise control
W/o accessory steering wheel control
X14
X201

5.3L VIN M, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for 5.3L VIN M, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500:

(in fuse block jumper harness) j220
(not used)
4-speed a/t
4wd & 2 speed manual shift control transfer case
6-speed a/t
7.5a
A/c cmprsr relay
Air bag ign fuse 40 10a
Automatic transmission
Aux hvac- ign fuse 48 10a
Bck/up lamp pcb relay
Chmsl pcb relay
Drl pcb relay
Ecm-ign fuse 56 15a
Engine control module (ecm)
Except 4wd & 2 speed manual shift control transfer case
Fog lamp relay
From body control module (diagram 4 of 6)
From dlis fuse 35 (diagram 4 of 6)
Front drive axle actuator
Frt wash pcb relay
Frt wpr fuse 36 25a
Fuel pmp relay
Fuel system control module (fscm)
G107 (4.3l) g102 (except 4.3l) (4.3l: top left rear of engine) (except 4.3l: on lower left front of engine)
Hdlp lo/hid relay
Heated steering fuse
Heated steering wheel control module
Hi beam pcb relay
Horn pcb relay
Hvac-ign fuse 55 10a
Inflatable restraint i/p module disable switch (if equipped)
Inflatable restraint passenger air bag on/off indicator (if equipped)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint steering wheel module coil
Inside rearview mirror (isrvm)
Instrument panel cluster (ipc)
J105
J130 (in engine harness)
L/gate pcb relay
Left air temperature actuator (automatic a/c)
Left i/p j/b (lower left x9
Misc ing fuse 43 10a
Mode actuator
Nca
Park lamp relay
Pnk
Rear defog relay
Rear wash pcb relay
Recirculation actuator
Red
Right air temperature actuator (automatic a/c) air temperature actuator (manual a/c)
Right i/p j/b (in right end of dash)
Run/ crnk relay
Secondary fuel pump relay (6.0l (vin k) w/o auxiliary fuel tank)
Seo/alc fuse 54 10a
Side of dash)
Stop lamp switch
Strtr relay
To fan 1 fuse 57 (diagram 6 of 6)
Trailer brake control module (if equipped)
Trans ign 1 fuse 19 15a
Transfer case shift control module
Transmission control module (tcm)
Trlr lt stop/turn pcb relay
Trlr rt stop/turn pcb relay
Underhood fuse block (left side of engine compt)
W/ auto 4x4 & electronic 4x4
W/ steering wheel heater
W/o 4.3l, 5.3l (vin o), 6.0l (vin k) & 5.3l (vin 3)
W/o steering wheel heater
Wiper control pcb relay
Wiper speed pcb relay
X1 left i/p j/b (lower left x9
X11
X12
X14
X175

5.3L VIN M, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN M, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500:

(in ignition coil jumper harness, between ignition coils 4 & 2) j110
(in ignition coil jumper harness, between ignition coils 5 & 7) j107
(in spo theft harness) j227
(not used)
4.3l
Auxiliary battery
Central sequential fuel injection (central sfi)
Eap fuse 38 15a
Ecm/throt cont fuse 5 15a
Electronic adjustable pedals pcb relay
Eng fuse 4 15a
Engine control module (ecm)
Evaporative emission (evap) canister purge solenoid valve
Except 4.3l
Fan cntrl relay
Fan hi relay
Fan lo relay
Fan-1 fuse 57 40a
Fan-2 fuse 60 40a
From frt wpr p fuse 36 (diagram 5 of 6)
Fuel injector
Heated oxygen sensor (ho2s) bank 1 sensor 1
Heated oxygen sensor (ho2s) bank 1 sensor 2
Heated oxygen sensor (ho2s) bank 2 sensor 1
Heated oxygen sensor (ho2s) bank 2 sensor 2
Ignition coil/ module
Ignition control module (icm)
Inj-a fuse 24 20a
Inj-b fuse 13 (except 4.3l) 20a
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
O2-a snsr fuse 18 10a
O2-b snsr fuse 8 10a
Park enable pcb relay
Pnk
Pnk (in engine harness) j128
Power take off (pto) module (if equipped)
Pwr/ trn relay
Security indicator lamp
Seo b1 fuse 52 15a
Spo alarm
To auxiliary battery run relay (diagram 1 of 6)
Underhood fuse block (left side of engine compt)
Valve lifter oil manifold (vlom) assembly (5.3l, 6.0l & 6.2l)
Vehicle inclination sensor
Vehicle shock sensor
W/ comfort & decor level 3 convenience package & luxury
X14
X2 left i/p j/b (lower left side of dash)

6.0L VIN Y

6.0L VIN Y, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500

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List of elements for 6.0L VIN Y, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500:

(in fuse block jumper harness) j210
(in fuse block jumper harness) j211
(in fuse block jumper harness) j224
(in roof console) emergency vehicle roof lamp relay
(info not available)
(not used)
(on lower left front of engine) (except 4.3l) g102
175a
4 speed a/t
6 speed a/t
6.0l (vin k)
6a6
Auto 4x4
Automatic a/c
Auxiliary battery relay (if equipped) (rear of x1 engine compt)
Auxiliary battery run relay
Body builder emergency lamp
Body control module (bcm)
Data link connector (dlc)
Ecm- batt fuse 12 10a
Electronic 4x4 & auto 4x4
Engine control module (ecm)
Evaporative emission (evap) canister vent solenoid valve
From left i/p j/b (diagram 4 of 6)
From underhood fuse block (diagram 6 of 6)
Fuse a 30a
Fuse b 30a
Fuse c 30a
Fuse d 30a
Fuse holder (right side of firewall)
G103 (on front of right cylinder head)
G107 (4.3l) (top left rear of engine)
G200 (on right front corner of hvac module)
Generator
Hdlp wash fuse 22 20a
Hvac batt fuse 39 10a
Hvac control module
I/p 1 accessory power outlet
Instrument panel cluster (ipc)
Ipc fuse 46 10a
Itbc fuse 6 15a
J145
J200
J209 (in fuse block jumper harness)
J219
Left battery
Left i/p j/b (lower left x2
Ltr fuse 53 20a
Manual a/c
Mega fuse (right rear of engine compt)
Mega fuse 125a
Mega fuse 175a
Mega fuse 60a
Nca
Red
Relay a
Relay b
Right battery
Right i/p j/b (in right end of dash)
Seo b2 fuse 37 30a
Side of dash)
Starter
Stud 2 fuse 63 30a
Tcm-batt fuse 14 15a
To roof beacon switch (diagram 2 of 6)
To stud 1 fuse 68 (diagram 2 of 6)
To underhood fuse block (diagram 2 of 6)
To underhood fuse block (diagram 3 of 6)
Trailer brake control module (if equipped)
Trailer brake control relay (if equipped)
Transfer case encoder motor
Transfer case shift control module
Transmission control module (tcm)
Trec fuse 67 30a
Underhood fuse block (left side of engine compt)
W/ auxiliary battery
W/ emergency vehicle roof lamp relay
W/ wrecker emergency lamp provisions
W/ wrecker relay
Windshield washer solvent heater (if equipped)
Wrecker relay
Wsw/htr fuse 66 60a
X14

6.0L VIN Y, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500

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List of elements for 6.0L VIN Y, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500:

(in camper harness) j414
(in sliding rear window jumper harness) j336
(not used)
(w/ individual front seat) j315
Abs-1 fuse 61 40a
Abs-2 fuse 9 25a
Bcm fuse 10a
Blower motor control module
Body control module (bcm)
Comfort & decor level 3 convenience package
Cooled seats fuse 30a
Ctsy fuse 15a
Ddm fuse 15a
Dim fuse 15a
Driver door lock/ window switch
Driver power seat adjuster
Driver seat 2 circuit breaker cb3 25a
Driver seat adjuster switch
Driver window switch
Dsm fuse 10a
Elec run board fuse 65 30a
Electronic brake control module (ebcm)
Except 4.3l, 5.3l (vin o), 6.0l & 5.3l (vin 3)
From fusible link 3 (diagram 1 of 6)
From ipc f fuse 46 (diagram 1 of 6)
From pdm fuse (diagram 3 of 6)
From right i/p j/b (diagram 1 of 6)
Front seat
Fscm fuse 21 20a
Fuel system control module (fscm)
G200 (on right front corner of hvac module)
Heavy duty abs fuse 59 60a
Hvac blwr fuse 70 40a
Hydraulic power brake control
I/p fuse block (left side of dash)
J323
Lbec 2 fuse 72 60a
Left i/p j/b (lower left side of dash)
Left i/p j/b (lower left side x1
Left rear window switch
Lt dr circuit breaker 25a
Mbec 1 fuse 69 60a
Memory seat module (msm)
Obs det fuse 10a
Of dash)
Outside rearview mirror switch
Pass seat 1 circuit breaker cb2 25a
Passenger door lock/ window switch
Passenger power seat adjuster
Passenger seat adjuster switch
Passenger seat lumbar switch
Passenger window switch
Pwr mir fuse 2a
Pwr rear wndw circuit breaker cb4 25a
Rear hvac fuse 30a
Rear object sensor control module (w/ rear parking assist)
Rear seat fuse 20a
Rear wpr fuse 25a
Red
Remote control door lock receiver (rcdlr)
Right i/p j/b (in right end of x3 dash)
Right i/p j/b (in right end of x6 dash)
Right rear window switch
Roof beacon relay (in overhead console)
Roof beacon switch
Rt doors circuit breaker cb1 25a
Rt stop trn fuse 15a
S/roof fuse 34 30a
Sliding rear window close relay
Sliding rear window open relay
Stud 1 fuse 68 (auxiliary battery) 40a
Sunroof module
To lgm fuse 71 (diagram 3 of 6)
Trailer connector
Underhood fuse block (left side of engine compt)
W/ active & vacuum power brake control
W/ comfort & decor level 3 convenience package
W/ electrical alarm bulb & camper trailer provision
W/ electrical alarm bulb & w/o camper trailer provision
W/ individual
W/ individual front seat
W/ individual front seat & power mirror
W/ power window
W/ restraint system
W/ roof beacon relay
W/ sunroof
W/ truck trailer hd wiring harness
W/ wrecker & emergency vehicle roof lamp relay
W/o comfort & decor level 3 convenience package
W/o individual
W/o individual front seat
W/o individual front seat & power mirror
X10
X11
X12

6.0L VIN Y, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for 6.0L VIN Y, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500:

(in pto jumper harness) (w/ power take off) j127
(lower left side of dash) left i/p j/b
(not used)
2a1
Air bag batt fuse 45 15a
Alc/comp fuse 58 40a
Amp fuse 41 30a
Audio amplifier (premium audio branded w/ amplifier speaker system)
Automatic a/c
Aux pwr 2 fuse 20a
Aux pwr fuse 20a
Body control module (bcm)
Center console accessory power outlet
Center console compartment accessory power outlet
Center seat accessory power outlet
Chime module
Comfort & decor level 3 convenience package
Crew cab w/ individual front seat
Digital radio receiver (if equipped)
Enhanced audio
Esc/alc exh fuse 2 30a
Exp/pto fuse 47 15a
From auxiliary battery run relay (diagram 1 of 6)
From fscm fuse 21 (diagram 2 of 6)
G200 (on right front corner of hvac module)
G304 (on lower right "b" pillar)
Garage door opener (gdo)
Hvac control module
I/p 2 accessory power outlet
I/p fuse block (left side of dash)
Inflatable restraint passenger presence system (pps) module (if equipped)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint vehicle rollover sensor
Info fuse 10a
Is lps fuse 10a
J200
J203
J304
Lbec 1 fuse 64 60a
Left i/p j/b (lower left side of dash)
Left i/p j/b (lower left side x10
Lgm fuse 71 30a
Lock pcb relay
Lock/unlock pcb relay
Lt stop trn fuse 15a
Luxury edition
Manual a/c
Merchandised package
Nca
Of dash)
Passenger door lock/ window switch
Pdm fuse (w/ comfort & decor level 3 convenience package & luxury) 15a
Performance
Power locks w/o individual front seat & power mirror
Power take off (pto) relay
Premium audio branded
Radio
Rdo fuse 42 15a
Rear seat audio (rsa) control (if equipped)
Rear seat ent fuse 5a
Right i/p j/b (in right end of dash)
Right i/p j/b (in right end of x2 dash)
Stop lamps fuse 15a
To body control module (diagram 4 of 6)
To dlis fuse 35 (diagram 4 of 6)
To left i/p block (diagram 2 of 6)
To lt dr circuit breaker (diagram 2 of 6)
Underhood fuse block (left side of engine compt)
Unlock pcb relay
Vehicle communication interface module (vcim)
Video display
W/ amplifier speaker system
W/ az3
W/ custom console front compt floor
W/ head curtain air bag
W/ individual front seat & power mirror
W/ luxury
W/ rear seat entertain- ment package
W/ universal garage door opener
W/ wrecker, emergency vehicle roof lamp & roof beacon relay
W/o luxury
W/o radio
Windshield washer solvent heater (if equipped)
X11

6.0L VIN Y, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for 6.0L VIN Y, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500:

(if equipped) windshield outside moisture sensor
(in instrument panel harness, in transfer case shift control module connector breakout) j207
(in the steering column harness) j216
(not used)
12v
2a1
2a4
4 speed a/t
4.3l
6 speed a/t
Acc
Acc volt
Automatic transmission manual shift switch
Automatic transmission shift lever
Body control module (bcm)
Column harness) j213
Comfort & decor level 3 convenience package w/o individual front seat & power mirror
Dlis fuse 35 2a
Driver window switch
Electronic 4x4 & auto 4x4
Engine control module (ecm)
Except 4.3l
Except comfort & decor level 3 convenience package w/o individual front seat & power mirror
Except electronic 4x4 & auto 4x4
From lbec 1 fuse 64 (diagram 3 of 6)
From underhood fuse block (diagram 3 of 6)
Ign
Ignition switch
Inflatable restraint steering wheel module coil
J104 (in engine harness, 5 cm from engine control module connector breakout)
J212 (in steering column harness)
J231
Left i/p j/b (lower left side of dash)
Left steering wheel control switch
Nca
Off
Passenger window switch
Pnk
Rear sliding window switch (if equipped)
Right i/p j/b (in right end of dash)
Right i/p j/b (in right end of x2 dash)
Right steering wheel control switch
Run
Start
Sunroof control module (if equipped)
Theft deterrent module (tdm)
To mobile radio fuse block (diagram 1 of 6)
To run/crnk relay (diagram 5 of 6)
To underhood fuse block (diagram 5 of 6)
Transfer case shift control module
Transfer case shift control switch
Transmission control module (tcm)
Underhood fuse block (left side of engine compt)
W/ 10 series
W/ 10 series, auto 4x4 & electronic 4x4
W/ 4 speed, accessory steering wheel & automatic electronic cruise control
W/ 6 speed
W/ accessory steering wheel & automatic electronic cruise control
W/ accessory steering wheel control
W/ power window
W/0 10 series, auto 4x4 & electronic 4x4
W/o accessory steering wheel & automatic electronic cruise control
W/o accessory steering wheel control
X14
X201

6.0L VIN Y, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for 6.0L VIN Y, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500:

(in fuse block jumper harness) j220
(not used)
4-speed a/t
4wd & 2 speed manual shift control transfer case
6-speed a/t
7.5a
A/c cmprsr relay
Air bag ign fuse 40 10a
Automatic transmission
Aux hvac- ign fuse 48 10a
Bck/up lamp pcb relay
Chmsl pcb relay
Drl pcb relay
Ecm-ign fuse 56 15a
Engine control module (ecm)
Except 4wd & 2 speed manual shift control transfer case
Fog lamp relay
From body control module (diagram 4 of 6)
From dlis fuse 35 (diagram 4 of 6)
Front drive axle actuator
Frt wash pcb relay
Frt wpr fuse 36 25a
Fuel pmp relay
Fuel system control module (fscm)
G107 (4.3l) g102 (except 4.3l) (4.3l: top left rear of engine) (except 4.3l: on lower left front of engine)
Hdlp lo/hid relay
Heated steering fuse
Heated steering wheel control module
Hi beam pcb relay
Horn pcb relay
Hvac-ign fuse 55 10a
Inflatable restraint i/p module disable switch (if equipped)
Inflatable restraint passenger air bag on/off indicator (if equipped)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint steering wheel module coil
Inside rearview mirror (isrvm)
Instrument panel cluster (ipc)
J105
J130 (in engine harness)
L/gate pcb relay
Left air temperature actuator (automatic a/c)
Left i/p j/b (lower left x9
Misc ing fuse 43 10a
Mode actuator
Nca
Park lamp relay
Pnk
Rear defog relay
Rear wash pcb relay
Recirculation actuator
Red
Right air temperature actuator (automatic a/c) air temperature actuator (manual a/c)
Right i/p j/b (in right end of dash)
Run/ crnk relay
Secondary fuel pump relay (6.0l (vin k) w/o auxiliary fuel tank)
Seo/alc fuse 54 10a
Side of dash)
Stop lamp switch
Strtr relay
To fan 1 fuse 57 (diagram 6 of 6)
Trailer brake control module (if equipped)
Trans ign 1 fuse 19 15a
Transfer case shift control module
Transmission control module (tcm)
Trlr lt stop/turn pcb relay
Trlr rt stop/turn pcb relay
Underhood fuse block (left side of engine compt)
W/ auto 4x4 & electronic 4x4
W/ steering wheel heater
W/o 4.3l, 5.3l (vin o), 6.0l (vin k) & 5.3l (vin 3)
W/o steering wheel heater
Wiper control pcb relay
Wiper speed pcb relay
X1 left i/p j/b (lower left x9
X11
X12
X14
X175

6.0L VIN Y, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500

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List of elements for 6.0L VIN Y, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500:

(in ignition coil jumper harness, between ignition coils 4 & 2) j110
(in ignition coil jumper harness, between ignition coils 5 & 7) j107
(in spo theft harness) j227
(not used)
4.3l
Auxiliary battery
Central sequential fuel injection (central sfi)
Eap fuse 38 15a
Ecm/throt cont fuse 5 15a
Electronic adjustable pedals pcb relay
Eng fuse 4 15a
Engine control module (ecm)
Evaporative emission (evap) canister purge solenoid valve
Except 4.3l
Fan cntrl relay
Fan hi relay
Fan lo relay
Fan-1 fuse 57 40a
Fan-2 fuse 60 40a
From frt wpr p fuse 36 (diagram 5 of 6)
Fuel injector
Heated oxygen sensor (ho2s) bank 1 sensor 1
Heated oxygen sensor (ho2s) bank 1 sensor 2
Heated oxygen sensor (ho2s) bank 2 sensor 1
Heated oxygen sensor (ho2s) bank 2 sensor 2
Ignition coil/ module
Ignition control module (icm)
Inj-a fuse 24 20a
Inj-b fuse 13 (except 4.3l) 20a
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
O2-a snsr fuse 18 10a
O2-b snsr fuse 8 10a
Park enable pcb relay
Pnk
Pnk (in engine harness) j128
Power take off (pto) module (if equipped)
Pwr/ trn relay
Security indicator lamp
Seo b1 fuse 52 15a
Spo alarm
To auxiliary battery run relay (diagram 1 of 6)
Underhood fuse block (left side of engine compt)
Valve lifter oil manifold (vlom) assembly (5.3l, 6.0l & 6.2l)
Vehicle inclination sensor
Vehicle shock sensor
W/ comfort & decor level 3 convenience package & luxury
X14
X2 left i/p j/b (lower left side of dash)

6.2L VIN 8

6.2L VIN 8, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500

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List of elements for 6.2L VIN 8, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra HD 2008 2500:

(in fuse block jumper harness) j210
(in fuse block jumper harness) j211
(in fuse block jumper harness) j224
(in roof console) emergency vehicle roof lamp relay
(info not available)
(not used)
(on lower left front of engine) (except 4.3l) g102
175a
4 speed a/t
6 speed a/t
6.0l (vin k)
6a6
Auto 4x4
Automatic a/c
Auxiliary battery relay (if equipped) (rear of x1 engine compt)
Auxiliary battery run relay
Body builder emergency lamp
Body control module (bcm)
Data link connector (dlc)
Ecm- batt fuse 12 10a
Electronic 4x4 & auto 4x4
Engine control module (ecm)
Evaporative emission (evap) canister vent solenoid valve
From left i/p j/b (diagram 4 of 6)
From underhood fuse block (diagram 6 of 6)
Fuse a 30a
Fuse b 30a
Fuse c 30a
Fuse d 30a
Fuse holder (right side of firewall)
G103 (on front of right cylinder head)
G107 (4.3l) (top left rear of engine)
G200 (on right front corner of hvac module)
Generator
Hdlp wash fuse 22 20a
Hvac batt fuse 39 10a
Hvac control module
I/p 1 accessory power outlet
Instrument panel cluster (ipc)
Ipc fuse 46 10a
Itbc fuse 6 15a
J145
J200
J209 (in fuse block jumper harness)
J219
Left battery
Left i/p j/b (lower left x2
Ltr fuse 53 20a
Manual a/c
Mega fuse (right rear of engine compt)
Mega fuse 125a
Mega fuse 175a
Mega fuse 60a
Nca
Red
Relay a
Relay b
Right battery
Right i/p j/b (in right end of dash)
Seo b2 fuse 37 30a
Side of dash)
Starter
Stud 2 fuse 63 30a
Tcm-batt fuse 14 15a
To roof beacon switch (diagram 2 of 6)
To stud 1 fuse 68 (diagram 2 of 6)
To underhood fuse block (diagram 2 of 6)
To underhood fuse block (diagram 3 of 6)
Trailer brake control module (if equipped)
Trailer brake control relay (if equipped)
Transfer case encoder motor
Transfer case shift control module
Transmission control module (tcm)
Trec fuse 67 30a
Underhood fuse block (left side of engine compt)
W/ auxiliary battery
W/ emergency vehicle roof lamp relay
W/ wrecker emergency lamp provisions
W/ wrecker relay
Windshield washer solvent heater (if equipped)
Wrecker relay
Wsw/htr fuse 66 60a
X14

6.2L VIN 8, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500

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List of elements for 6.2L VIN 8, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra HD 2008 2500:

(in camper harness) j414
(in sliding rear window jumper harness) j336
(not used)
(w/ individual front seat) j315
Abs-1 fuse 61 40a
Abs-2 fuse 9 25a
Bcm fuse 10a
Blower motor control module
Body control module (bcm)
Comfort & decor level 3 convenience package
Cooled seats fuse 30a
Ctsy fuse 15a
Ddm fuse 15a
Dim fuse 15a
Driver door lock/ window switch
Driver power seat adjuster
Driver seat 2 circuit breaker cb3 25a
Driver seat adjuster switch
Driver window switch
Dsm fuse 10a
Elec run board fuse 65 30a
Electronic brake control module (ebcm)
Except 4.3l, 5.3l (vin o), 6.0l & 5.3l (vin 3)
From fusible link 3 (diagram 1 of 6)
From ipc f fuse 46 (diagram 1 of 6)
From pdm fuse (diagram 3 of 6)
From right i/p j/b (diagram 1 of 6)
Front seat
Fscm fuse 21 20a
Fuel system control module (fscm)
G200 (on right front corner of hvac module)
Heavy duty abs fuse 59 60a
Hvac blwr fuse 70 40a
Hydraulic power brake control
I/p fuse block (left side of dash)
J323
Lbec 2 fuse 72 60a
Left i/p j/b (lower left side of dash)
Left i/p j/b (lower left side x1
Left rear window switch
Lt dr circuit breaker 25a
Mbec 1 fuse 69 60a
Memory seat module (msm)
Obs det fuse 10a
Of dash)
Outside rearview mirror switch
Pass seat 1 circuit breaker cb2 25a
Passenger door lock/ window switch
Passenger power seat adjuster
Passenger seat adjuster switch
Passenger seat lumbar switch
Passenger window switch
Pwr mir fuse 2a
Pwr rear wndw circuit breaker cb4 25a
Rear hvac fuse 30a
Rear object sensor control module (w/ rear parking assist)
Rear seat fuse 20a
Rear wpr fuse 25a
Red
Remote control door lock receiver (rcdlr)
Right i/p j/b (in right end of x3 dash)
Right i/p j/b (in right end of x6 dash)
Right rear window switch
Roof beacon relay (in overhead console)
Roof beacon switch
Rt doors circuit breaker cb1 25a
Rt stop trn fuse 15a
S/roof fuse 34 30a
Sliding rear window close relay
Sliding rear window open relay
Stud 1 fuse 68 (auxiliary battery) 40a
Sunroof module
To lgm fuse 71 (diagram 3 of 6)
Trailer connector
Underhood fuse block (left side of engine compt)
W/ active & vacuum power brake control
W/ comfort & decor level 3 convenience package
W/ electrical alarm bulb & camper trailer provision
W/ electrical alarm bulb & w/o camper trailer provision
W/ individual
W/ individual front seat
W/ individual front seat & power mirror
W/ power window
W/ restraint system
W/ roof beacon relay
W/ sunroof
W/ truck trailer hd wiring harness
W/ wrecker & emergency vehicle roof lamp relay
W/o comfort & decor level 3 convenience package
W/o individual
W/o individual front seat
W/o individual front seat & power mirror
X10
X11
X12

6.2L VIN 8, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500

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List of elements for 6.2L VIN 8, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra HD 2008 2500:

(in pto jumper harness) (w/ power take off) j127
(lower left side of dash) left i/p j/b
(not used)
2a1
Air bag batt fuse 45 15a
Alc/comp fuse 58 40a
Amp fuse 41 30a
Audio amplifier (premium audio branded w/ amplifier speaker system)
Automatic a/c
Aux pwr 2 fuse 20a
Aux pwr fuse 20a
Body control module (bcm)
Center console accessory power outlet
Center console compartment accessory power outlet
Center seat accessory power outlet
Chime module
Comfort & decor level 3 convenience package
Crew cab w/ individual front seat
Digital radio receiver (if equipped)
Enhanced audio
Esc/alc exh fuse 2 30a
Exp/pto fuse 47 15a
From auxiliary battery run relay (diagram 1 of 6)
From fscm fuse 21 (diagram 2 of 6)
G200 (on right front corner of hvac module)
G304 (on lower right "b" pillar)
Garage door opener (gdo)
Hvac control module
I/p 2 accessory power outlet
I/p fuse block (left side of dash)
Inflatable restraint passenger presence system (pps) module (if equipped)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint vehicle rollover sensor
Info fuse 10a
Is lps fuse 10a
J200
J203
J304
Lbec 1 fuse 64 60a
Left i/p j/b (lower left side of dash)
Left i/p j/b (lower left side x10
Lgm fuse 71 30a
Lock pcb relay
Lock/unlock pcb relay
Lt stop trn fuse 15a
Luxury edition
Manual a/c
Merchandised package
Nca
Of dash)
Passenger door lock/ window switch
Pdm fuse (w/ comfort & decor level 3 convenience package & luxury) 15a
Performance
Power locks w/o individual front seat & power mirror
Power take off (pto) relay
Premium audio branded
Radio
Rdo fuse 42 15a
Rear seat audio (rsa) control (if equipped)
Rear seat ent fuse 5a
Right i/p j/b (in right end of dash)
Right i/p j/b (in right end of x2 dash)
Stop lamps fuse 15a
To body control module (diagram 4 of 6)
To dlis fuse 35 (diagram 4 of 6)
To left i/p block (diagram 2 of 6)
To lt dr circuit breaker (diagram 2 of 6)
Underhood fuse block (left side of engine compt)
Unlock pcb relay
Vehicle communication interface module (vcim)
Video display
W/ amplifier speaker system
W/ az3
W/ custom console front compt floor
W/ head curtain air bag
W/ individual front seat & power mirror
W/ luxury
W/ rear seat entertain- ment package
W/ universal garage door opener
W/ wrecker, emergency vehicle roof lamp & roof beacon relay
W/o luxury
W/o radio
Windshield washer solvent heater (if equipped)
X11

6.2L VIN 8, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500

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List of elements for 6.2L VIN 8, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra HD 2008 2500:

(if equipped) windshield outside moisture sensor
(in instrument panel harness, in transfer case shift control module connector breakout) j207
(in the steering column harness) j216
(not used)
12v
2a1
2a4
4 speed a/t
4.3l
6 speed a/t
Acc
Acc volt
Automatic transmission manual shift switch
Automatic transmission shift lever
Body control module (bcm)
Column harness) j213
Comfort & decor level 3 convenience package w/o individual front seat & power mirror
Dlis fuse 35 2a
Driver window switch
Electronic 4x4 & auto 4x4
Engine control module (ecm)
Except 4.3l
Except comfort & decor level 3 convenience package w/o individual front seat & power mirror
Except electronic 4x4 & auto 4x4
From lbec 1 fuse 64 (diagram 3 of 6)
From underhood fuse block (diagram 3 of 6)
Ign
Ignition switch
Inflatable restraint steering wheel module coil
J104 (in engine harness, 5 cm from engine control module connector breakout)
J212 (in steering column harness)
J231
Left i/p j/b (lower left side of dash)
Left steering wheel control switch
Nca
Off
Passenger window switch
Pnk
Rear sliding window switch (if equipped)
Right i/p j/b (in right end of dash)
Right i/p j/b (in right end of x2 dash)
Right steering wheel control switch
Run
Start
Sunroof control module (if equipped)
Theft deterrent module (tdm)
To mobile radio fuse block (diagram 1 of 6)
To run/crnk relay (diagram 5 of 6)
To underhood fuse block (diagram 5 of 6)
Transfer case shift control module
Transfer case shift control switch
Transmission control module (tcm)
Underhood fuse block (left side of engine compt)
W/ 10 series
W/ 10 series, auto 4x4 & electronic 4x4
W/ 4 speed, accessory steering wheel & automatic electronic cruise control
W/ 6 speed
W/ accessory steering wheel & automatic electronic cruise control
W/ accessory steering wheel control
W/ power window
W/0 10 series, auto 4x4 & electronic 4x4
W/o accessory steering wheel & automatic electronic cruise control
W/o accessory steering wheel control
X14
X201

6.2L VIN 8, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500

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List of elements for 6.2L VIN 8, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra HD 2008 2500:

(in fuse block jumper harness) j220
(not used)
4-speed a/t
4wd & 2 speed manual shift control transfer case
6-speed a/t
7.5a
A/c cmprsr relay
Air bag ign fuse 40 10a
Automatic transmission
Aux hvac- ign fuse 48 10a
Bck/up lamp pcb relay
Chmsl pcb relay
Drl pcb relay
Ecm-ign fuse 56 15a
Engine control module (ecm)
Except 4wd & 2 speed manual shift control transfer case
Fog lamp relay
From body control module (diagram 4 of 6)
From dlis fuse 35 (diagram 4 of 6)
Front drive axle actuator
Frt wash pcb relay
Frt wpr fuse 36 25a
Fuel pmp relay
Fuel system control module (fscm)
G107 (4.3l) g102 (except 4.3l) (4.3l: top left rear of engine) (except 4.3l: on lower left front of engine)
Hdlp lo/hid relay
Heated steering fuse
Heated steering wheel control module
Hi beam pcb relay
Horn pcb relay
Hvac-ign fuse 55 10a
Inflatable restraint i/p module disable switch (if equipped)
Inflatable restraint passenger air bag on/off indicator (if equipped)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint steering wheel module coil
Inside rearview mirror (isrvm)
Instrument panel cluster (ipc)
J105
J130 (in engine harness)
L/gate pcb relay
Left air temperature actuator (automatic a/c)
Left i/p j/b (lower left x9
Misc ing fuse 43 10a
Mode actuator
Nca
Park lamp relay
Pnk
Rear defog relay
Rear wash pcb relay
Recirculation actuator
Red
Right air temperature actuator (automatic a/c) air temperature actuator (manual a/c)
Right i/p j/b (in right end of dash)
Run/ crnk relay
Secondary fuel pump relay (6.0l (vin k) w/o auxiliary fuel tank)
Seo/alc fuse 54 10a
Side of dash)
Stop lamp switch
Strtr relay
To fan 1 fuse 57 (diagram 6 of 6)
Trailer brake control module (if equipped)
Trans ign 1 fuse 19 15a
Transfer case shift control module
Transmission control module (tcm)
Trlr lt stop/turn pcb relay
Trlr rt stop/turn pcb relay
Underhood fuse block (left side of engine compt)
W/ auto 4x4 & electronic 4x4
W/ steering wheel heater
W/o 4.3l, 5.3l (vin o), 6.0l (vin k) & 5.3l (vin 3)
W/o steering wheel heater
Wiper control pcb relay
Wiper speed pcb relay
X1 left i/p j/b (lower left x9
X11
X12
X14
X175

6.2L VIN 8, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500

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List of elements for 6.2L VIN 8, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra HD 2008 2500:

(in ignition coil jumper harness, between ignition coils 4 & 2) j110
(in ignition coil jumper harness, between ignition coils 5 & 7) j107
(in spo theft harness) j227
(not used)
4.3l
Auxiliary battery
Central sequential fuel injection (central sfi)
Eap fuse 38 15a
Ecm/throt cont fuse 5 15a
Electronic adjustable pedals pcb relay
Eng fuse 4 15a
Engine control module (ecm)
Evaporative emission (evap) canister purge solenoid valve
Except 4.3l
Fan cntrl relay
Fan hi relay
Fan lo relay
Fan-1 fuse 57 40a
Fan-2 fuse 60 40a
From frt wpr p fuse 36 (diagram 5 of 6)
Fuel injector
Heated oxygen sensor (ho2s) bank 1 sensor 1
Heated oxygen sensor (ho2s) bank 1 sensor 2
Heated oxygen sensor (ho2s) bank 2 sensor 1
Heated oxygen sensor (ho2s) bank 2 sensor 2
Ignition coil/ module
Ignition control module (icm)
Inj-a fuse 24 20a
Inj-b fuse 13 (except 4.3l) 20a
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
O2-a snsr fuse 18 10a
O2-b snsr fuse 8 10a
Park enable pcb relay
Pnk
Pnk (in engine harness) j128
Power take off (pto) module (if equipped)
Pwr/ trn relay
Security indicator lamp
Seo b1 fuse 52 15a
Spo alarm
To auxiliary battery run relay (diagram 1 of 6)
Underhood fuse block (left side of engine compt)
Valve lifter oil manifold (vlom) assembly (5.3l, 6.0l & 6.2l)
Vehicle inclination sensor
Vehicle shock sensor
W/ comfort & decor level 3 convenience package & luxury
X14
X2 left i/p j/b (lower left side of dash)

POWER DOOR LOCKS

Power Door Locks Wiring Diagram, Base for GMC Sierra HD 2008 2500

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List of elements for Power Door Locks Wiring Diagram, Base for GMC Sierra HD 2008 2500:

3a4
3a6
3b3
3b4
Bcm fuse 10a
Body control module (bcm) (lower left side of dash)
Class 2
Coax
Computer data
Computer data lines system
Dim fuse 15a
Driver door latch assembly (rear of driver's door)
Driver door lock switch
Driver information center (dic)
Dsm fuse 10a
Dvr unlck fuse 15a
G201 (upper left corner of dash)
G302 (below right side of passenger's seat)
Gmlan
Gnd
Hot at all times
I/p fuse block (left side of dash)
Instrument panel cluster (ipc)
J502
J602
Keyless entry antenna
Lck 1 fuse 15a
Lck 2 fuse 15a
Lck cntrl
Lck sig
Left rear door latch assembly (crew cab) (rear of left rear door)
Lines system
Lock actuator
Lock pcb relay
Logic
Passenger door latch assembly (rear of passenger's door)
Passenger door lock switch
Remote control door lock receiver (rcdlr) (top rear of passenger compt)
Right i/p junction block (in right x3 end of dash)
Right rear door latch assembly (crew cab) (rear of right rear door)
Security indicator
Tan
Unlck 1 fuse 10a
Unlck 2 fuse 15a
Unlck cntrl
Unlck sig
Unlock pcb relay
W/ convenience package
W/o convenience package

Power Door Locks Wiring Diagram, Premium for GMC Sierra HD 2008 2500

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List of elements for Power Door Locks Wiring Diagram, Premium for GMC Sierra HD 2008 2500:

3b2
4a7
Bcm fuse 10a
Body control module (bcm) (lower left side of dash)
Class 2
Coax
Computer data lines system
Ddm fuse 15a
Dim fuse 15a
Door lock switch
Driver door latch assembly (rear of driver's door)
Driver door lock/ window switch
Driver information center (dic)
Dsm fuse 10a
G200 (on right front corner of hvac module)
G201 (upper left corner of dash)
G302 (below right side of passenger's seat)
Gmlan
Gnd
Hot at all times
I/p fuse block (left side of dash)
Instrument panel cluster (ipc)
Key switch
Keyless entry antenna
Lck 1 fuse 15a
Lck cntrl
Left rear door latch assembly (crew cab) (rear of left rear door)
Lock
Lock actuator
Lock cntrl
Lock/ unlock pcb relay
Logic
Passenger door latch assembly (rear of passenger's door)
Passenger door lock/ window switch
Pdm fuse 15a
Remote control door lock receiver (rcdlr) (top rear of passenger compt)
Right i/p junction block (in right x1 end of dash)
Right rear door latch assembly (crew cab) (rear of right rear door)
Security indicator
Sw gnd
Sw sig
Tan
Unlck 1 fuse 15a
Unlck cntrl
Unlock

POWER MIRRORS

Electrochromic Mirror Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Electrochromic Mirror Wiring Diagram for GMC Sierra HD 2008 2500:

(4.8l/5.3l/6.0l/6.2l: on lower left front of engine) (4.3l: top left rear of engine) (6.6l: on front of right cylinder head)
4.3l
4.8l/5.3l/6.0l/6.2l
6.6l
Ambient air temperature display
Ambient air temperature sensor (on radiator support)
Ambient light
Aux hvac ign fuse 45 fuse 48 15a
Backup rly
Body control module (bcm) (lower left side of dash)
Compass display
Driver door lock/ window switch
Driver outside rearview mirror
Electro- chromic
Emergency sw
Except 6.6l
G102
G103
G107
G200 (on right front corner of hvac module)
Gnd
Green light
Hot at all times
I/p fuse block (left side of dash)
Ign 1
Inside rearview mirror (isrvm)
J105
J220 (w/ pnk
J328 (w/ onstar)
Led sig
Left i/p junction block (lower left x10 side of dash)
Logic
Low ref
Mirr sig
Onstar button assembly
Onstar sw
Pnk
Red light
Run/crank relay
Run/crank rly
Selector switch
Sens sig
Sig
Steering wheel heater)
Tele- phone sw
Underhood fuse block (left side of engine compt)
Vehicle communication interface module (vcim) (behind center of dash)
Volt
W/ power folding mirrors
X10

Power Mirrors Wiring Diagram, Manual Foldiing Mirror for GMC Sierra HD 2008 2500

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List of elements for Power Mirrors Wiring Diagram, Manual Foldiing Mirror for GMC Sierra HD 2008 2500:

Defogger system
Down
Driver outside rearview mirror
Exterior lights system
G201 (upper left corner of dash)
Hot at all times
I/p fuse block (left side of dash)
Interior lights system
J502
Left
Nca
Outside rearview mirror switch
Passenger outside rearview mirror
Pwr mir fuse 2a
Right
Tan

Power Mirrors Wiring Diagram, Power Foldiing Mirror (1 of 2) for GMC Sierra HD 2008 2500

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List of elements for Power Mirrors Wiring Diagram, Power Foldiing Mirror (1 of 2) for GMC Sierra HD 2008 2500:

5v ref
Computer data lines system
Ddm fuse 15a
Defogger switch
Down
Driver door lock/ window switch
Driver outside rearview mirror
Electro- chromic
Electrochromic mirror circuit
Extend
Extend ctrl
G201 (upper left corner of dash)
Gnd
Hot at all times
Hvac control module
I/p fuse block (left side of dash)
J500 (in driver's outside rearview mirror jumper)
J501 (in driver's outside rearview mirror jumper)
L/r select
Left
Logic
Low ref
Mtr comm
Outside rearview mirror switch
Pnk
Position ctrl
Retract
Retract ctrl
Right
Sens sig
Serial data
Sply volt
Sw pwr

Power Mirrors Wiring Diagram, Power Foldiing Mirror (2 of 2) for GMC Sierra HD 2008 2500

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List of elements for Power Mirrors Wiring Diagram, Power Foldiing Mirror (2 of 2) for GMC Sierra HD 2008 2500:

3b2
4a7
5v ref
Computer data lines system
Extend ctrl
G200 (on right front corner of hvac module)
Gnd
Hot at all times
I/p fuse block (left side of dash)
J600 (in passenger's outside rearview mirror jumper)
J601 (in passenger's outside rearview mirror jumper)
Low ref
Mtr comm
Passenger door lock/ window switch
Passenger outside rearview mirror
Pdm fuse 15a
Position ctrl
Retract ctrl
Right i/p junction block (in right end of dash)
Sens sig
Serial data
Sply volt

POWER SEATS

Adjustable Pedal Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Adjustable Pedal Wiring Diagram for GMC Sierra HD 2008 2500:

(except 6.6l) (6.6l)
Body control module (bcm) (lower left side of dash)
Eap fuse 38 fuse 35 15a
Electronic adjustable pedal (eap) assembly (under left side of dash)
Electronic adjustable pedals pcb relay
Fwd
G200 (on right front corner of hvac module)
Hot at all times
I/p multi-function switch
J200
Left i/p junction block (lower left side of dash)
Park enable pcb relay
Rwd
Underhood fuse block (left side of engine compt)

Driver Power Seat Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Driver Power Seat Wiring Diagram for GMC Sierra HD 2008 2500:

Driver seat 2 circuit breaker cb3 25a
Driver seat adjuster motor assembly (on driver's seat track)
Driver seat adjuster switch
Driver seat front vertical motor
Driver seat horizontal motor
Driver seat rear vertical motor
Fwd
G303 (crew cab/ extended cab) (on lower left "b" pillar)
G304 (regular cab) (on lower right "b" pillar)
Hot at all times
Left i/p junction block (lower left side of dash)
Nca
Rwd
Tan
X12

Heated Seats Wiring Diagram (1 of 2) for GMC Sierra HD 2008 2500

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List of elements for Heated Seats Wiring Diagram (1 of 2) for GMC Sierra HD 2008 2500:

Computer data lines system
Driver back heated seat element (in driver's seat back)
Driver cushion heated seat element (in driver's seat cushion)
Driver seat 2 circuit breaker cb3 25a
Elem ctrl
G303 (on lower left "b" pillar)
Gnd
Hot at all times
J306
J311 (in driver seat harness, 5 cm from memory seat module x4 breakout)
J316 (in passenger seat harness, 5 cm from x305 breakout)
Left i/p junction block (lower left side of dash)
Low ref
Memory seat module (under front of driver's seat)
Nca
Passenger back heated seat element (in passenger's seat back)
Passenger cushion heated seat element (in passenger's seat cushion)
Pnk
Serial data
Sply volt
Tan
Temp sig
X12

Heated Seats Wiring Diagram (2 of 2) for GMC Sierra HD 2008 2500

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List of elements for Heated Seats Wiring Diagram (2 of 2) for GMC Sierra HD 2008 2500:

3b2
4a7
Back & cushion ind ctrl
Back ind ctrl
Back seat ind
Computer data lines system
Cushion/back ind
Ddm fuse 15a
Dimming ctrl
Driver door lock/ window switch
Driver heated seat switch
Dsm fuse 10a
G200 (on right front corner of hvac module)
G201 (upper left corner of dash)
Gnd
Hi temp ind ctrl
High ind
Hot at all times
I/p fuse block (left side of dash)
Low ind
Low ref
Low temp ind ctrl
Med ind
Med temp ind ctrl
Passenger door lock/ window switch
Passenger heated seat switch
Pdm fuse 15a
Pnk
Right i/p junction block (in right end of dash)
Serial data
Tan

Heated Steering Wheel Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Heated Steering Wheel Wiring Diagram for GMC Sierra HD 2008 2500:

(except 6.6l) (6.6l)
7.5a
Aux hvac ign fuse 48 fuse 45 10a
Body control module (bcm) (lower left side of dash)
Dim sig
G200 (on right front corner of hvac module)
Gnd
Heated steering fuse
Heated steering wheel
Heated steering wheel control module (in steering wheel)
Heated steering wheel ind
Heated steering wheel switch
Hot at all times
Ign
Inflatable restraint steering wheel module coil (behind steering wheel)
J214
J220
J223
Led cntrl
Left steering wheel control switch
Nca
Pnk
Red
Sns sig
Sw sig
Underhood fuse block (left side of engine compt)
Whl cntrl

Passenger Power Seat Wiring Diagram, 6-Way Power Seat for GMC Sierra HD 2008 2500

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List of elements for Passenger Power Seat Wiring Diagram, 6-Way Power Seat for GMC Sierra HD 2008 2500:

Fwd
G304 (on lower right "b" pillar)
Hot at all times
J314
Left i/p junction block (lower left side of dash)
Nca
Pass seat 1 circuit breaker cb2 25a
Passenger seat adjuster motor assembly (on passenger's seat track)
Passenger seat adjuster switch
Passenger seat front vertical motor
Passenger seat horizontal motor
Passenger seat rear vertical motor
Rwd
Tan
X11

Passenger Power Seat Wiring Diagram, 8-Way Power Seat for GMC Sierra HD 2008 2500

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List of elements for Passenger Power Seat Wiring Diagram, 8-Way Power Seat for GMC Sierra HD 2008 2500:

(in passenger's seat back)
Fwd
G304 (on lower right "b" pillar)
Hot at all times
J314
Left i/p junction block (lower left side of dash)
Nca
Pass seat 1 circuit breaker cb2 25a
Passenger seat adjuster motor assembly (on passenger's seat track)
Passenger seat adjuster switch
Passenger seat front vertical motor
Passenger seat horizontal motor
Passenger seat lumbar horizontal motor (in passenger's seat back)
Passenger seat lumbar switch
Passenger seat lumbar vertical motor
Passenger seat rear vertical motor
Passenger seat recline motor (lower right side of passenger's seat back)
Pnk
Rwd
Tan
X11

POWER TOP/SUNROOF

Power Top/Sunroof Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Power Top/Sunroof Wiring Diagram for GMC Sierra HD 2008 2500:

(gas) (diesel)
2b1
2b3
Accsy volt
Body control module (lower left side of dash)
Close
Crew cab
G200 (on right front corner of hvac module)
Ground
Hot at all times
Illumination lamp
Interior lights system
J324
Left i/p junction block (lower left side of dash)
Open
Pnk
Power distribution system
Right i/p junction block (in right end of dash) x2
Roof clos sig
Roof open sig
S/roof fuse 34 fuse 31 30a
Sunroof module (in front of sunroof, above headliner)
Sunroof switch
Sw xprs sig
Underhood fuse block (left side of engine compartment)
Vent
Vnt clos sig
Vnt open sig
X14
Xprs
Xprs (crew cab)

POWER WINDOWS

Power Windows Wiring Diagram, with AN3/DL3 for GMC Sierra HD 2008 2500

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List of elements for Power Windows Wiring Diagram, with AN3/DL3 for GMC Sierra HD 2008 2500:

(crew & extended cab)
(in right end of dash) junction block (right i/p)
(upper left corner of dash) g201
3b1
3b4
4a7
B+ volt
Body control module (lower left side of dash)
Door locks system
Down
Driver door lock/window switch
Driver window motor (inside driver's door)
Fuse block (i/p) (left side of dash)
G200 (on right front corner of hvac module)
G303 (on lower left "b" pillar)
G304 (on lower right "b" pillar)
Ground
Hot at all times
Illumination
Interior lights system
Junction block (left i/p) (lower left side of dash)
Left rear window switch
Lo spd serial data
Lo speed serial data
Logic
Lr window
Lt dr circuit breaker 25a
Passenger door lock/window switch
Passenger window
Pwr wnd lockout lr signal
Pwr wnd lockout rr ctrl
Pwr wnd lockout rr sig
Pwr wnd motor lf down ctrl
Pwr wnd motor lf up ctrl
Pwr wnd motor lr down ctrl
Pwr wnd motor lr up ctrl
Pwr wnd motor rf down ctrl
Pwr wnd motor rf up ctrl
Pwr wnd motor rr down ctrl
Pwr wnd motor rr up ctrl
Pwr wnd sw lockout sig
Pwr wnd sw lr down sig
Pwr wnd sw lr up sig
Pwr wnd sw rr down sig
Pwr wnd sw rr up sig
Pwr wnd switch lr down signal
Pwr wnd switch lr up signal
Pwr wnd switch rr down signal
Pwr wnd switch rr up signal
Right rear window switch
Rr window
Rt doors circuit breaker cb1 25a
Splice pack jx221 (in the i/p harness, behind left side of dash)
Switch power
W/ individual front seat
Window down
Window driver
Window lockout indicator down
Window lockout switch
Window motor (left rear) (in left rear door)
Window motor (passenger) (inside passenger's door)
Window motor (right rear) (in right rear door)
Window switch (left rear)
Window switch (right rear)
Window switch passenger
Window up
Window up express down window down
X11

Power Windows Wiring Diagram, without AN3/DL3 for GMC Sierra HD 2008 2500

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List of elements for Power Windows Wiring Diagram, without AN3/DL3 for GMC Sierra HD 2008 2500:

(in right end of dash) junction block (right i/p)
3b4
Accessory voltage
B+ volt
Body control module (lower left side of dash)
Exprs down
Fuse block (i/p) (left side of dash)
G200 (on right front corner of hvac module)
G201 (upper left corner of dash)
G303 (on lower left "b" pillar)
G304 (on lower right "b" pillar)
Ground
Hot at all times
Illumination
Interior lights system
J231
J502
J603
Junction block (left i/p) (lower left side of dash)
Left rear window switch
Logic
Lr window
Lt dr circuit breaker 25a
Passenger window
Pwr wnd lockout lr signal
Pwr wnd lockout rr control
Pwr wnd lockout rr ctrl
Pwr wnd lockout sig
Pwr wnd motor lf down ctrl
Pwr wnd motor lf up ctrl
Pwr wnd motor lr down ctrl
Pwr wnd motor lr up ctrl
Pwr wnd motor rf down ctrl
Pwr wnd motor rf up ctrl
Pwr wnd motor rr down ctrl
Pwr wnd motor rr up ctrl
Pwr wnd sw lr down sig
Pwr wnd sw lr up sig
Pwr wnd sw pass down sig
Pwr wnd sw pass up sig
Pwr wnd sw rr down sig
Pwr wnd sw rr up sig
Pwr wnd switch lr down signal
Pwr wnd switch lr up signal
Pwr wnd switch rr down signal
Pwr wnd switch rr up signal
Right rear window switch
Rr window
Rt doors circuit breaker cb1 25a
Tan
Window down
Window driver
Window motor (driver) (inside driver's door)
Window motor (left rear) (in left rear door)
Window motor (passenger) (inside passenger's door)
Window motor (right rear) (in right rear door)
Window switch
Window switch (driver)
Window switch (left rear)
Window switch (passenger)
Window switch (right rear)
Window up
X11

Sliding Rear Window Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Sliding Rear Window Wiring Diagram for GMC Sierra HD 2008 2500:

(on right front corner of hvac module)
Acces- sory voltage
Body control module (bcm) (lower left side of dash)
Close
G200
G304 (except crew cab) (on lower right "b" pillar)
G307 (crew cab) (at right rear corner of passenger compartment)
Hot at all times
Illumi- nation
Interior lights system
J323
J335
J336
Junction block (left i/p) (lower left side of dash)
Open
Power tops system
Pwr rear wndw circuit breaker cb4 25a
Sliding rear window close relay
Sliding rear window motor (right rear of passenger compartment)
Sliding rear window open relay
Tan
Window switch (sliding rear window)
X12

RADIO

Radio Wiring Diagram, with Y91 & with UQA (1 of 3) for GMC Sierra HD 2008 2500

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List of elements for Radio Wiring Diagram, with Y91 & with UQA (1 of 3) for GMC Sierra HD 2008 2500:

(in overhead console) cellular telephone microphone
(left front of roof) cellular/ navigation & digital radio antenna
(lower left side of dash) left i/p junction block
(pins: 6-16 not used)
6.6l
Amp fuse 41 fuse 38 30a
Antenna
Aud sig
Audio w/ dvd navigation
Bare
Cellular/navigation & digital radio antenna (left front of roof)
Coax
Computer data lines system
Digital radio receiver (behind right end of dash)
Drain wire
Except 6.6l
G301 (below left side of passenger's seat)
Gmlan
Gmlan+
Gmlan-
Grd
Green led
Hot at all times
Info fuse 27 10a
Interior lights system
J204
Keypad sig
L aud+
L aud-
Led cntrl
Lf aud+
Lf aud-
Low ref
Low ref/ drain wire
Lr aud+
Lr aud-
Nca
Pnk
Power distribution system
R aud+
R aud-
Radio
Rdo fuse 42 fuse 39 15a
Red led
Rem sig
Rf aud+
Rf aud-
Rr aud+
Rr aud-
Tan
Underhood fuse block (left side of engine compt)
Vehicle communication interface module (vcim) (behind center of dash)
Voice sig
Voice sig/ tele sig
W/ gps
W/o gps
X12

Radio Wiring Diagram, with Y91 & with UQA (2 of 3) for GMC Sierra HD 2008 2500

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List of elements for Radio Wiring Diagram, with Y91 & with UQA (2 of 3) for GMC Sierra HD 2008 2500:

(left side of center console) noise compensation microphone
(under rear of center console) audio amplifier
Amplf+
Amplf-
Bare
Computer data lines system
Drain wire
F aud-
F centr spk+
F centr spk-
G301 (below left side of passenger's seat)
Gmlan
Grd
Infrared ref
Infrared v
Inside rearview mirror (isrvm)
J330
L infrared
L subwfr-
Lf aud+
Lf aud-
Lf spk+
Lf spk-
Lr aud+
Lr aud-
Microph volt
Nca
Pnk
R infrared
R subwfr+
R subwfr-
Rear seat audio (rsa) controller
Rf aud+
Rf spk+
Rf spk-
Rr aud+
Rr aud-
Subwfr+
Subwoofer speaker
Tan

Radio Wiring Diagram, with Y91 & with UQA (3 of 3) for GMC Sierra HD 2008 2500

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List of elements for Radio Wiring Diagram, with Y91 & with UQA (3 of 3) for GMC Sierra HD 2008 2500:

3a1
3a2
Ampl+
Ampl-
Anti-lock brakes system
Aud low ref
Audio/video adapter
Aux vid h
Aux video h
Bare
Center i/p speaker
Drain wire
Dvd aud com
Dvd aud sh
Dvd comm
Dvd+
Dvd-
Grd
I/p fuse block (left side of dash)
Infrared module (in headliner)
Infrared+
Infrared-
L aud sig
L aux aud
L aux vid
L dvd+
Left front speaker
Left front tweeter speaker
Left rear speaker
Nca
Nca b+
Nca dvd+
Nca dvd-
Nca enable sig
Nca grd
Nca video cntrl
Nca video sig
Pnk
R aud sig
R aux aud
R aux vid
R dvd+
Radio
Right front speaker
Right front tweeter speaker
Right i/p junction block (in right end of dash)
Right rear speaker
Signal+
Signal-
Tan
Video cntrl
Video display
Video sig
Volt
Vss

Radio Wiring Diagram, with Y91 & without UQA (1 of 3) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for Radio Wiring Diagram, with Y91 & without UQA (1 of 3) for GMC Sierra HD 2008 2500:

(in overhead console) cellular telephone microphone
(left front of roof) cellular/ navigation & digital radio antenna
(lower left side of dash) left i/p junction block
(pins: 6-16 not used)
6.6l
Antenna
Aud sig
Audio w/ dvd navigation
Bare
Cellular/ navigation & digital radio antenna (left front of roof)
Coax
Computer data lines system
Digital radio receiver
Drain wire
Except 6.6l
G301 (below left side of passenger's seat)
Gmlan
Gmlan+
Gmlan-
Gnd
Grd
Green led
Hot at all times
I/p fuse block (left side of dash)
Info fuse 27 10a
Interior lights system
J204
Keypad sig
L aud+
L aud-
Led cntrl
Lf spk+
Lf spk-
Low ref
Low ref/ drain wire
Lr aud+
Lr aud-
Nca
Pnk
Power distribution system
R aud+
R aud-
Radio
Rdo fuse 42 fuse 39 15a
Red led
Rem sig
Rf spk+
Rf spk-
Rr aud+
Rr aud-
Tan
Underhood fuse block (left side of engine compt)
Vehicle communication interface module (vcim) (behind center of dash)
Voice sig
Voice sig/ tele sig
W/ gps
W/o gps
X12

Radio Wiring Diagram, with Y91 & without UQA (2 of 3) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for Radio Wiring Diagram, with Y91 & without UQA (2 of 3) for GMC Sierra HD 2008 2500:

2a1
Bare
Computer data lines system
Drain wire
G301 (below left side of passenger's seat)
Gmlan
Gnd
Hot at all times
I/p fuse block (left side of dash)
Infrared ref
Infrared v
Inside rearview mirror (isrvm)
J330
L infrared
Left i/p junction block x12 (lower left side of dash)
Nca
Pnk
R infrared
Rear seat audio (rsa) control
Rear seat ent fuse 16 5a
Right i/p j/b (in right end of dash)
Tan
W/ performance enhanced audio
W/o performance enhanced audio

Radio Wiring Diagram, with Y91 & without UQA (3 of 3) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for Radio Wiring Diagram, with Y91 & without UQA (3 of 3) for GMC Sierra HD 2008 2500:

(w/ performance enhanced audio) left front tweeter speaker
(w/ performance enhanced audio) right front tweeter speaker
3a1
Anti-lock brakes system
Aud low ref
Audio/video adapter
Aux vid h
Aux video h
Bare
Drain wire
Dvd aud com
Dvd aud sh
Dvd comm
Dvd+
Dvd-
Gnd
I/p fuse block (left side of dash)
Infrared module (in headliner)
Infrared+
Infrared-
L aud sig
L aux aud
L aux vid
L dvd+
Left front speaker
Left rear speaker
Nca
Nca b+
Nca dvd+
Nca dvd-
Nca enable sig
Nca gnd
Nca video cntrl
Nca video sig
Pnk
R aud sig
R aux aud
R aux vid
R dvd+
Radio
Right front speaker
Right rear speaker
Signal+
Signal-
Tan
Video cntrl
Video display
Video sig
Volt
Vss

Radio Wiring Diagram, without Y91 & with UQA (1 of 3) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for Radio Wiring Diagram, without Y91 & with UQA (1 of 3) for GMC Sierra HD 2008 2500:

(in overhead console) cellular telephone microphone
(left front of roof) cellular/ navigation & digital radio antenna
(lower left side of dash) left i/p junction block
6.6l
Amp fuse 41 fuse 38 30a
Ampl cntrl
Antenna
Aud sig
Audio w/ dvd navigation
Bare
Cellular/navigation & digital radio antenna (left front of roof)
Coax
Computer data lines system
Digital radio receiver (behind right end of dash)
Drain wire
Except 6.6l
G301 (below left side of passenger's seat)
Gmlan
Gmlan+
Gmlan-
Grd
Green led
Hot at all times
Info fuse 27 10a
Interior lights system
Keypad sig
L aud+
L aud-
Left i/p junction block (lower left x3
Lf aud+
Lf aud-
Low ref
Low ref/ drain wire
Lr aud+
Lr aud-
Nca
Not used
Pins: 6-16 not used
Pnk
R aud+
R aud-
Radio
Rdo fuse 42 fuse 39 15a
Red led
Rem sig/ led cntrl
Rf aud+
Rf aud-
Rr aud+
Rr aud-
Side of dash)
Tan
Tele sig
Underhood fuse block (left side of engine compt)
Vehicle communication interface module (vcim) (behind center of dash)
Voice sig
W/ gps
W/o gps
X12

Radio Wiring Diagram, without Y91 & with UQA (2 of 3) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for Radio Wiring Diagram, without Y91 & with UQA (2 of 3) for GMC Sierra HD 2008 2500:

(under rear of center console) audio amplifier
2a1
Ampl cntrl
Bare
Computer data lines system
Drain wire
F aud-
G301 (below left side of passenger's seat)
Gmlan
Grd
Hot at all times
I/p fuse block (left side of dash)
Infrared ref
Infrared v
Inside rearview mirror (isrvm)
J330
L infrared
L subwfr+
L subwfr-
Lf aud+
Lf aud-
Lf spk+
Lf spk-
Lr aud+
Lr aud-
Nca
Pnk
R infrared
R subwfr+
R subwfr-
Rear seat audio (rsa) controller
Rear seat ent fuse 5a
Rem enable
Rf aud+
Rf spk+
Rf spk-
Right i/p j/b (in right end of dash)
Rr aud
Rr aud+
Rr aud-
Subwoofer speaker
Tan

Radio Wiring Diagram, without Y91 & with UQA (3 of 3) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for Radio Wiring Diagram, without Y91 & with UQA (3 of 3) for GMC Sierra HD 2008 2500:

3a1
3a2
Anti-lock brakes system
Aud low ref
Audio/video adapter
Aux vid h
Aux video h
Bare
Drain wire
Dvd aud com
Dvd aud sh
Dvd comm
Dvd+
Dvd-
Grd
I/p fuse block (left side of dash)
Infrared module (in headliner)
Infrared+
Infrared-
L aud sig
L aux aud
L aux vid
L dvd+
Left front speaker
Left front tweeter speaker
Left rear speaker
Nca
Nca b+
Nca dvd+
Nca dvd-
Nca enable sig
Nca grd
Nca video cntrl
Nca video sig
Pnk
R aud sig
R aux aud
R aux vid
R dvd+
Radio
Right front speaker
Right front tweeter speaker
Right i/p junction block (in right end of dash)
Right rear speaker
Signal+
Signal-
Tan
Video cntrl
Video display
Video sig
Volt
Vss

Radio Wiring Diagram, without Y91 & without UQA (1 of 3) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for Radio Wiring Diagram, without Y91 & without UQA (1 of 3) for GMC Sierra HD 2008 2500:

(in overhead console) cellular telephone microphone
(left front of roof) cellular, navigation & digital radio antenna
(lower left side of dash) left i/p junction block
(pins: 6-16 not used)
6.6l
Antenna
Aud sig
Audio w/ dvd navigation
Bare
Cellular/ navigation & digital radio antenna (left front of roof)
Coax
Computer data lines system
Digital radio receiver
Drain wire
Except 6.6l
G301 (below left side of passenger's seat)
Gmlan
Gmlan+
Gmlan-
Gnd
Grd
Green led
Hot at all times
I/p fuse block (left side of dash)
Info fuse 27 10a
Interior lights system
Keypad sig
L aud+
L aud-
Led cntrl
Lf spk+
Lf spk-
Low ref
Low ref/ drain wire
Lr aud+
Lr aud-
Nca
Pnk
R aud+
R aud-
Radio
Rdo fuse 42 fuse 39 15a
Red led
Rf spk+
Rf spk-
Rr aud+
Rr aud-
Tan
Underhood fuse block (left side of engine compt)
Vehicle communication interface module (vcim) (behind center of dash)
Voice sig
Voice sig/ tele sig
W/ gps
W/o gps
X12

Radio Wiring Diagram, without Y91 & without UQA (2 of 3) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for Radio Wiring Diagram, without Y91 & without UQA (2 of 3) for GMC Sierra HD 2008 2500:

2a1
Bare
Computer data lines system
Drain wire
G301 (below left side of passenger's seat)
Gmlan
Gnd
Hot at all times
I/p fuse block (left side of dash)
Infrared ref
Infrared v
Inside rearview mirror (isrvm)
J330
L infrared
Left i/p junction block x12 (lower left side of dash)
Pnk
R infrared
Rear seat audio (rsa) control
Rear seat ent fuse 16 5a
Right i/p j/b (in right end of dash)
Tan
W/ performance enhanced audio
W/o performance enhanced audio

Radio Wiring Diagram, without Y91 & without UQA (3 of 3) for GMC Sierra HD 2008 2500

Tüm kablolama şemalarına erişin araba

List of elements for Radio Wiring Diagram, without Y91 & without UQA (3 of 3) for GMC Sierra HD 2008 2500:

(w/ performance enhanced audio) left front tweeter speaker
(w/ performance enhanced audio) right front tweeter speaker
Anti-lock brakes system
Aud low ref
Audio/video adapter
Aux vid h
Aux video h
Bare
Drain wire
Dvd aud com
Dvd aud sh
Dvd comm
Dvd+
Dvd-
Gnd
I/p fuse block (left side of dash)
Infrared module (in headliner)
Infrared+
Infrared-
L aud sig
L aux aud
L aux vid
L dvd+
Left front speaker
Left rear speaker
Nca
Nca b+
Nca dvd+
Nca dvd-
Nca enable sig
Nca gnd
Nca video cntrl
Pnk
R aud sig
R aux aud
R aux vid
R dvd+
Radio
Right front speaker
Right rear speaker
Signal+
Signal-
Tan
Video cntrl
Video display
Video sig
Volt
Vss

SHIFT INTERLOCK

Shift Interlock Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for Shift Interlock Wiring Diagram for GMC Sierra HD 2008 2500:

(4.3l)
(except 4.3l)
(lower left side of dash) left i/p junction block
(or 2500)
(or 2501)
4-speed a/t
4.3l
6.6l
Automatic transmission
Automatic transmission internal mode switch
Automatic transmission shift lock control solenoid
Body control module (bcm) (lower left side of dash)
Brk sw sig
Computer data lines system
Control solenoid valve assembly
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Exterior lights system
G102 (on lower left front of engine)
G103 (on front of right cylinder head)
G106 (right rear of engine)
G200 (on right front corner of hvac module)
Gasoline w/ 6-speed a/t
Gmlan hi-spd (+)
Gmlan hi-spd (-)
Gnd
Hot at all times
Internal mode switch (ims)
J105
J106
J144
J215
Misc ign fuse 43 (except 6.6l) fuse 40 (6.6l) 10a
P/n signal
P/n switch
Park/neutral position (pnp) switch (on left rear side of transmission)
Pnk
Power distribution system
Run/crank relay
Run/crank relay ctrl
Start switch
Stop lamp switch (top of brake pedal assembly)
Tan
Transmission control module (left front of engine compt, near fan shroud)
Transmissions system
Underhood fuse block (left side of engine compt)

STARTING/CHARGING

4.3L VIN X

4.3L VIN X, Charging Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 4.3L VIN X, Charging Wiring Diagram for GMC Sierra HD 2008 2500:

10 series
175a
4.3l
Battery current sensor (right rear of engine compt)
Body control module (bcm) (lower left side of dash)
Charge ind sig
Charge indicator
Computer data lines system
Current sply
Data bus +
Data bus -
Driver information center (dic)
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuse holder (right side of firewall)
G101 (on lower right radiator support)
G103 (on front of right cylinder head)
Generator
Generator sig
Hot at all times
Ign
Instrument panel cluster
Ipc fuse 46 10a
Logic
Low ref
Mega fuse (right rear of engine compt)
Mega fuse 175a
Pnk
Power distribution system
Red
Right battery
Sens sig
Serial data
Tan
Underhood fuse block (left side of engine compt)
Volt

4.3L VIN X, Starting Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 4.3L VIN X, Starting Wiring Diagram for GMC Sierra HD 2008 2500:

(on front of right cylinder head) (6.6l) g103
175a
4 speed a/t
4.3l
6 speed a/t
6.6l
Acc
Allison transmission 6 speed a/t
Automatic transmission
Automatic transmission fluid pressure (tfp) manual valve position switch
Automatic transmission internal mode switch (ims)
Battery
Body control module (bcm) (lower left side of dash)
Computer data lines system
Control solenoid valve assembly
Data bus +
Data bus -
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuse holder (right side of firewall)
G101 (on lower right radiator support)
G102 (except 4.3l) (on lower left front of engine)
G103 (except 4.3l) (on front of right cylinder head)
G103 (on front of right cylinder head)
G106 (4.3l) (right rear of engine)
G107 (4.3l) (top left rear of engine)
Ign
Ignition switch
Internal mode switch
J105
J106
J144
Lock
Mega fuse (right rear of engine compt)
Mega fuse 175a
Park/ neutral position (pnp) switch (on left rear side of transmission)
Pnk
Power distribution system
Red
Run
Start
Starter motor
Strt rly ctrl
Strtr fuse 62 (except 6.6l) fuse 57 (6.6l) 40a
Strtr relay
Tan
Transmission control module (tcm) (left front of engine compt, near fan shroud)
Underhood fuse block (left side of engine compt)

4.8L VIN C

4.8L VIN C, Charging Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 4.8L VIN C, Charging Wiring Diagram for GMC Sierra HD 2008 2500:

10 series
175a
4.3l
Battery current sensor (right rear of engine compt)
Body control module (bcm) (lower left side of dash)
Charge ind sig
Charge indicator
Computer data lines system
Current sply
Data bus +
Data bus -
Driver information center (dic)
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuse holder (right side of firewall)
G101 (on lower right radiator support)
G103 (on front of right cylinder head)
Generator
Generator sig
Hot at all times
Ign
Instrument panel cluster
Ipc fuse 46 10a
Logic
Low ref
Mega fuse (right rear of engine compt)
Mega fuse 175a
Pnk
Power distribution system
Red
Right battery
Sens sig
Serial data
Tan
Underhood fuse block (left side of engine compt)
Volt

4.8L VIN C, Starting Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 4.8L VIN C, Starting Wiring Diagram for GMC Sierra HD 2008 2500:

(on front of right cylinder head) (6.6l) g103
175a
4 speed a/t
4.3l
6 speed a/t
6.6l
Acc
Allison transmission 6 speed a/t
Automatic transmission
Automatic transmission fluid pressure (tfp) manual valve position switch
Automatic transmission internal mode switch (ims)
Battery
Body control module (bcm) (lower left side of dash)
Computer data lines system
Control solenoid valve assembly
Data bus +
Data bus -
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuse holder (right side of firewall)
G101 (on lower right radiator support)
G102 (except 4.3l) (on lower left front of engine)
G103 (except 4.3l) (on front of right cylinder head)
G103 (on front of right cylinder head)
G106 (4.3l) (right rear of engine)
G107 (4.3l) (top left rear of engine)
Ign
Ignition switch
Internal mode switch
J105
J106
J144
Lock
Mega fuse (right rear of engine compt)
Mega fuse 175a
Park/ neutral position (pnp) switch (on left rear side of transmission)
Pnk
Power distribution system
Red
Run
Start
Starter motor
Strt rly ctrl
Strtr fuse 62 (except 6.6l) fuse 57 (6.6l) 40a
Strtr relay
Tan
Transmission control module (tcm) (left front of engine compt, near fan shroud)
Underhood fuse block (left side of engine compt)

5.3L VIN 0

5.3L VIN 0, Charging Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 0, Charging Wiring Diagram for GMC Sierra HD 2008 2500:

10 series
175a
4.3l
Battery current sensor (right rear of engine compt)
Body control module (bcm) (lower left side of dash)
Charge ind sig
Charge indicator
Computer data lines system
Current sply
Data bus +
Data bus -
Driver information center (dic)
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuse holder (right side of firewall)
G101 (on lower right radiator support)
G103 (on front of right cylinder head)
Generator
Generator sig
Hot at all times
Ign
Instrument panel cluster
Ipc fuse 46 10a
Logic
Low ref
Mega fuse (right rear of engine compt)
Mega fuse 175a
Pnk
Power distribution system
Red
Right battery
Sens sig
Serial data
Tan
Underhood fuse block (left side of engine compt)
Volt

5.3L VIN 0, Starting Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 0, Starting Wiring Diagram for GMC Sierra HD 2008 2500:

(on front of right cylinder head) (6.6l) g103
175a
4 speed a/t
4.3l
6 speed a/t
6.6l
Acc
Allison transmission 6 speed a/t
Automatic transmission
Automatic transmission fluid pressure (tfp) manual valve position switch
Automatic transmission internal mode switch (ims)
Battery
Body control module (bcm) (lower left side of dash)
Computer data lines system
Control solenoid valve assembly
Data bus +
Data bus -
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuse holder (right side of firewall)
G101 (on lower right radiator support)
G102 (except 4.3l) (on lower left front of engine)
G103 (except 4.3l) (on front of right cylinder head)
G103 (on front of right cylinder head)
G106 (4.3l) (right rear of engine)
G107 (4.3l) (top left rear of engine)
Ign
Ignition switch
Internal mode switch
J105
J106
J144
Lock
Mega fuse (right rear of engine compt)
Mega fuse 175a
Park/ neutral position (pnp) switch (on left rear side of transmission)
Pnk
Power distribution system
Red
Run
Start
Starter motor
Strt rly ctrl
Strtr fuse 62 (except 6.6l) fuse 57 (6.6l) 40a
Strtr relay
Tan
Transmission control module (tcm) (left front of engine compt, near fan shroud)
Underhood fuse block (left side of engine compt)

5.3L VIN 3

5.3L VIN 3, Charging Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 3, Charging Wiring Diagram for GMC Sierra HD 2008 2500:

10 series
175a
4.3l
Battery current sensor (right rear of engine compt)
Body control module (bcm) (lower left side of dash)
Charge ind sig
Charge indicator
Computer data lines system
Current sply
Data bus +
Data bus -
Driver information center (dic)
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuse holder (right side of firewall)
G101 (on lower right radiator support)
G103 (on front of right cylinder head)
Generator
Generator sig
Hot at all times
Ign
Instrument panel cluster
Ipc fuse 46 10a
Logic
Low ref
Mega fuse (right rear of engine compt)
Mega fuse 175a
Pnk
Power distribution system
Red
Right battery
Sens sig
Serial data
Tan
Underhood fuse block (left side of engine compt)
Volt

5.3L VIN 3, Starting Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN 3, Starting Wiring Diagram for GMC Sierra HD 2008 2500:

(on front of right cylinder head) (6.6l) g103
175a
4 speed a/t
4.3l
6 speed a/t
6.6l
Acc
Allison transmission 6 speed a/t
Automatic transmission
Automatic transmission fluid pressure (tfp) manual valve position switch
Automatic transmission internal mode switch (ims)
Battery
Body control module (bcm) (lower left side of dash)
Computer data lines system
Control solenoid valve assembly
Data bus +
Data bus -
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuse holder (right side of firewall)
G101 (on lower right radiator support)
G102 (except 4.3l) (on lower left front of engine)
G103 (except 4.3l) (on front of right cylinder head)
G103 (on front of right cylinder head)
G106 (4.3l) (right rear of engine)
G107 (4.3l) (top left rear of engine)
Ign
Ignition switch
Internal mode switch
J105
J106
J144
Lock
Mega fuse (right rear of engine compt)
Mega fuse 175a
Park/ neutral position (pnp) switch (on left rear side of transmission)
Pnk
Power distribution system
Red
Run
Start
Starter motor
Strt rly ctrl
Strtr fuse 62 (except 6.6l) fuse 57 (6.6l) 40a
Strtr relay
Tan
Transmission control module (tcm) (left front of engine compt, near fan shroud)
Underhood fuse block (left side of engine compt)

5.3L VIN J

5.3L VIN J, Charging Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN J, Charging Wiring Diagram for GMC Sierra HD 2008 2500:

10 series
175a
4.3l
Battery current sensor (right rear of engine compt)
Body control module (bcm) (lower left side of dash)
Charge ind sig
Charge indicator
Computer data lines system
Current sply
Data bus +
Data bus -
Driver information center (dic)
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuse holder (right side of firewall)
G101 (on lower right radiator support)
G103 (on front of right cylinder head)
Generator
Generator sig
Hot at all times
Ign
Instrument panel cluster
Ipc fuse 46 10a
Logic
Low ref
Mega fuse (right rear of engine compt)
Mega fuse 175a
Pnk
Power distribution system
Red
Right battery
Sens sig
Serial data
Tan
Underhood fuse block (left side of engine compt)
Volt

5.3L VIN J, Starting Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN J, Starting Wiring Diagram for GMC Sierra HD 2008 2500:

(on front of right cylinder head) (6.6l) g103
175a
4 speed a/t
4.3l
6 speed a/t
6.6l
Acc
Allison transmission 6 speed a/t
Automatic transmission
Automatic transmission fluid pressure (tfp) manual valve position switch
Automatic transmission internal mode switch (ims)
Battery
Body control module (bcm) (lower left side of dash)
Computer data lines system
Control solenoid valve assembly
Data bus +
Data bus -
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuse holder (right side of firewall)
G101 (on lower right radiator support)
G102 (except 4.3l) (on lower left front of engine)
G103 (except 4.3l) (on front of right cylinder head)
G103 (on front of right cylinder head)
G106 (4.3l) (right rear of engine)
G107 (4.3l) (top left rear of engine)
Ign
Ignition switch
Internal mode switch
J105
J106
J144
Lock
Mega fuse (right rear of engine compt)
Mega fuse 175a
Park/ neutral position (pnp) switch (on left rear side of transmission)
Pnk
Power distribution system
Red
Run
Start
Starter motor
Strt rly ctrl
Strtr fuse 62 (except 6.6l) fuse 57 (6.6l) 40a
Strtr relay
Tan
Transmission control module (tcm) (left front of engine compt, near fan shroud)
Underhood fuse block (left side of engine compt)

5.3L VIN M

5.3L VIN M, Charging Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN M, Charging Wiring Diagram for GMC Sierra HD 2008 2500:

10 series
175a
4.3l
Battery current sensor (right rear of engine compt)
Body control module (bcm) (lower left side of dash)
Charge ind sig
Charge indicator
Computer data lines system
Current sply
Data bus +
Data bus -
Driver information center (dic)
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuse holder (right side of firewall)
G101 (on lower right radiator support)
G103 (on front of right cylinder head)
Generator
Generator sig
Hot at all times
Ign
Instrument panel cluster
Ipc fuse 46 10a
Logic
Low ref
Mega fuse (right rear of engine compt)
Mega fuse 175a
Pnk
Power distribution system
Red
Right battery
Sens sig
Serial data
Tan
Underhood fuse block (left side of engine compt)
Volt

5.3L VIN M, Starting Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 5.3L VIN M, Starting Wiring Diagram for GMC Sierra HD 2008 2500:

(on front of right cylinder head) (6.6l) g103
175a
4 speed a/t
4.3l
6 speed a/t
6.6l
Acc
Allison transmission 6 speed a/t
Automatic transmission
Automatic transmission fluid pressure (tfp) manual valve position switch
Automatic transmission internal mode switch (ims)
Battery
Body control module (bcm) (lower left side of dash)
Computer data lines system
Control solenoid valve assembly
Data bus +
Data bus -
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuse holder (right side of firewall)
G101 (on lower right radiator support)
G102 (except 4.3l) (on lower left front of engine)
G103 (except 4.3l) (on front of right cylinder head)
G103 (on front of right cylinder head)
G106 (4.3l) (right rear of engine)
G107 (4.3l) (top left rear of engine)
Ign
Ignition switch
Internal mode switch
J105
J106
J144
Lock
Mega fuse (right rear of engine compt)
Mega fuse 175a
Park/ neutral position (pnp) switch (on left rear side of transmission)
Pnk
Power distribution system
Red
Run
Start
Starter motor
Strt rly ctrl
Strtr fuse 62 (except 6.6l) fuse 57 (6.6l) 40a
Strtr relay
Tan
Transmission control module (tcm) (left front of engine compt, near fan shroud)
Underhood fuse block (left side of engine compt)

6.0L VIN Y

6.0L VIN Y, Charging Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 6.0L VIN Y, Charging Wiring Diagram for GMC Sierra HD 2008 2500:

10 series
175a
4.3l
Battery current sensor (right rear of engine compt)
Body control module (bcm) (lower left side of dash)
Charge ind sig
Charge indicator
Computer data lines system
Current sply
Data bus +
Data bus -
Driver information center (dic)
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuse holder (right side of firewall)
G101 (on lower right radiator support)
G103 (on front of right cylinder head)
Generator
Generator sig
Hot at all times
Ign
Instrument panel cluster
Ipc fuse 46 10a
Logic
Low ref
Mega fuse (right rear of engine compt)
Mega fuse 175a
Pnk
Power distribution system
Red
Right battery
Sens sig
Serial data
Tan
Underhood fuse block (left side of engine compt)
Volt

6.0L VIN Y, Starting Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 6.0L VIN Y, Starting Wiring Diagram for GMC Sierra HD 2008 2500:

(on front of right cylinder head) (6.6l) g103
175a
4 speed a/t
4.3l
6 speed a/t
6.6l
Acc
Allison transmission 6 speed a/t
Automatic transmission
Automatic transmission fluid pressure (tfp) manual valve position switch
Automatic transmission internal mode switch (ims)
Battery
Body control module (bcm) (lower left side of dash)
Computer data lines system
Control solenoid valve assembly
Data bus +
Data bus -
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuse holder (right side of firewall)
G101 (on lower right radiator support)
G102 (except 4.3l) (on lower left front of engine)
G103 (except 4.3l) (on front of right cylinder head)
G103 (on front of right cylinder head)
G106 (4.3l) (right rear of engine)
G107 (4.3l) (top left rear of engine)
Ign
Ignition switch
Internal mode switch
J105
J106
J144
Lock
Mega fuse (right rear of engine compt)
Mega fuse 175a
Park/ neutral position (pnp) switch (on left rear side of transmission)
Pnk
Power distribution system
Red
Run
Start
Starter motor
Strt rly ctrl
Strtr fuse 62 (except 6.6l) fuse 57 (6.6l) 40a
Strtr relay
Tan
Transmission control module (tcm) (left front of engine compt, near fan shroud)
Underhood fuse block (left side of engine compt)

6.2L VIN 8

6.2L VIN 8, Charging Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 6.2L VIN 8, Charging Wiring Diagram for GMC Sierra HD 2008 2500:

10 series
175a
4.3l
Battery current sensor (right rear of engine compt)
Body control module (bcm) (lower left side of dash)
Charge ind sig
Charge indicator
Computer data lines system
Current sply
Data bus +
Data bus -
Driver information center (dic)
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuse holder (right side of firewall)
G101 (on lower right radiator support)
G103 (on front of right cylinder head)
Generator
Generator sig
Hot at all times
Ign
Instrument panel cluster
Ipc fuse 46 10a
Logic
Low ref
Mega fuse (right rear of engine compt)
Mega fuse 175a
Pnk
Power distribution system
Red
Right battery
Sens sig
Serial data
Tan
Underhood fuse block (left side of engine compt)
Volt

6.2L VIN 8, Starting Wiring Diagram for GMC Sierra HD 2008 2500

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List of elements for 6.2L VIN 8, Starting Wiring Diagram for GMC Sierra HD 2008 2500:

(on front of right cylinder head) (6.6l) g103
175a
4 speed a/t
4.3l
6 speed a/t
6.6l
Acc
Allison transmission 6 speed a/t
Automatic transmission
Automatic transmission fluid pressure (tfp) manual valve position switch
Automatic transmission internal mode switch (ims)
Battery
Body control module (bcm) (lower left side of dash)
Computer data lines system
Control solenoid valve assembly
Data bus +
Data bus -
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
Fuse holder (right side of firewall)
G101 (on lower right radiator support)
G102 (except 4.3l) (on lower left front of engine)
G103 (except 4.3l) (on front of right cylinder head)
G103 (on front of right cylinder head)
G106 (4.3l) (right rear of engine)
G107 (4.3l) (top left rear of engine)
Ign
Ignition switch
Internal mode switch
J105
J106
J144
Lock
Mega fuse (right rear of engine compt)
Mega fuse 175a
Park/ neutral position (pnp) switch (on left rear side of transmission)
Pnk
Power distribution system
Red
Run
Start
Starter motor
Strt rly ctrl
Strtr fuse 62 (except 6.6l) fuse 57 (6.6l) 40a
Strtr relay
Tan
Transmission control module (tcm) (left front of engine compt, near fan shroud)
Underhood fuse block (left side of engine compt)

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram (1 of 2) for GMC Sierra HD 2008 2500

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List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for GMC Sierra HD 2008 2500:

(if equipped)
(right front corner of driver's seat track) (w/ 10 series) driver inflatable restraint seat position sensor (sps)
(top right side of dash) inflatable restraint i/p module
(w/ 10 series) passenger seat belt buckle
A x1
A2 x275
Driver seat belt buckle
Driver seat belt preten- sioner (on left "b" pillar)
Driver seat belt sw sig
Driver seat belt switch
Driver seat pos sw sig
Extended cab/ crew cab
G302 (below right side of passenger's seat)
I/p mod disable sw sig
I/p mod stage 1 hi ctrl
I/p mod stage 1 lo ctrl
I/p mod stage 2 hi ctrl
I/p mod stage 2 lo ctrl
I/p mod suppression ind ctrl
Ignition 1 voltage
Inflatable restraint sensing & diagnostic module (under driver's seat)
Inflatable restraint steering wheel module (in steering x1 wheel)
Inflatable restraint steering wheel module coil (behind steering wheel)
Inflatable restraint vehicle rollover sensor (w/ head curtain air bag) (below center console)
J303 (w/ child presence detector)
J305 (w/o driver power seat: in driver seat harness, 12.5 cm from driver seat belt buckle) (w/ front individual seat: in driver seat harness, 4 cm in x303 breakout)
L seat belt pretensnr hi ctrl
L seat belt pretensnr lo ctrl
Left front inflatable restraint side impact sensor (in driver's door)
Left inflatable restraint front end sensor (on lower left radiator support)
Left rear inflatable restraint side impact sensor (in left rear door)
Lf discriminating sensor signal
Lf roof rail mod hi ctrl
Lf roof rail mod lo ctrl
Lf side impact sensing mod sig
Low reference
Low spd gmlan serial data
Lr side impact sensing mod sig
Nca
Passenger seat belt preten- sioner (on right "b" pillar)
Passenger seat belt sw sig
Passenger seat belt switch
Pin shorting bars engaged when module connector is disconnected from harness (shorting bars are connected between pins: 4-5, 6-7, 8-9, 10-11, 12-13, 14-15, 16-17 & 18-19)
Pnk
R seat belt pretensnr hi ctrl
R seat belt pretensnr lo ctrl
Rf discriminating sensor signal
Rf roof rail mod hi ctrl
Rf roof rail mod lo ctrl
Rf side impact sensing mod sig
Right front inflatable restraint side impact sensor (in passenger's door)
Right inflatable restraint front end sensor (on lower right radiator support)
Right rear inflatable restraint side impact sensor (in right rear door)
Rollover sensor high sig
Rr side impact sensing mod sig
Shorting bar
Stage 1
Stage 2
Str wheel mod stage 1 hi ctrl
Str wheel mod stage 1 lo ctrl
Str wheel mod stage 2 hi ctrl
Str wheel mod stage 2 lo ctrl
Tan
W/ 10 series
W/o 10 series

Supplemental Restraints Wiring Diagram (2 of 2) for GMC Sierra HD 2008 2500

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List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for GMC Sierra HD 2008 2500:

(under front passenger seat) (w/ child presence detector)
(w/ inflatable restraint i/p module man suppression & child presence detector) inflatable restraint passenger air bag on/off indicator
6.6l (vin 6)
Air bag batt fuse 45 fuse 42 15a
Air bag ign fuse 40 fuse 37 10a
Air bag ind
Back light ind
Driver inflatable restraint roof rail module (behind left side of headliner trim)
Except 6.6l (vin 6)
Extended cab/ crew cab
G200 (on right front corner of hvac module)
G302 (below right side of passenger's seat)
Hot at all times
Hot w/ run/crnk relay energized
Ign
Inflatable restraint i/p module disable switch (if equipped)
Inflatable restraint passenger presence system (pps) module
Inflatable restraint passenger presence system (pps) sensor (in front passenger's seat bottom)
Instrument panel cluster (ipc)
J323
Left i/p junction block (lower left side of dash)
Lo spd gmlan serial data
Logic
Low reference
Low spd gmlan serial data
Nca
Off ind
On ind
Pass air bag off ind ctrl
Pass air bag on ind ctrl
Pass seat belt ind
Passenger inflatable restraint roof rail module (behind right side of headliner trim)
Passenger inflatable restraint seat belt tension sensor
Passenger seat belt buckle
Passenger seat belt ind
Pnk
Regular cab
Seat belt ind
Sensor signal
Serial data
Shorting bar
Splice pack jx221 (in the i/p harness, behind left side of dash)
Splice pack jx339 (in body harness, below passenger seat)
Tan
Underhood fuse block (left side of engine compt)
Voltage reference
W/ head curtain air bag
X1 a1
X11
X2 p1
X4 d4
X5 g2

TRANSMISSION

A/T Wiring Diagram (1 of 2) for GMC Sierra HD 2008 2500

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List of elements for A/T Wiring Diagram (1 of 2) for GMC Sierra HD 2008 2500:

(4.3l)
(except 4.3l)
(lower left side of dash) left i/p junction block
1-2 shift sol
2-3 shift sol
3-2 shift sol
Acc wake up data
Battery
Brk sw sign
Computer data lines system
Exterior lights system
G103 (on front of right cylinder head)
G106 (right rear of engine)
Gnd
Hi spd gmlan data (+)
Hi spd gmlan data (-)
Hot at all times
Hot w/ run/crank relay energized
Ign 1 volt
Iss sign
J106
J130
Low ref
Misc ign fuse 43 10a
P/n
Park/neutral position (pnp) switch (on left rear side of transmission)
Pc sol hi
Pc sol low
Pnk
Power distribution system
Replicated tos sig
Stop lamp switch (top of brake pedal assembly)
Tan
Tcc pwm
Tcc sol valve ctrl
Tcm-batt fuse 14 10a
Tfp sw a sig
Tfp sw b sig
Tfp sw c sig
Tft sens sig
Tr sw a sig
Tr sw b sig
Tr sw c sig
Tr sw p sig
Trans ig1 fuse 19 15a
Transmission control module (tcm) (left front of engine compt, near fan shroud)
Underhood fuse block (left side of engine compt)
Vehicle speed sensor (vss) (on transmission tailshaft housing)
Vss hi sig
Vss low
W/ 4wd
W/o 4wd

A/T Wiring Diagram (2 of 2) for GMC Sierra HD 2008 2500

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List of elements for A/T Wiring Diagram (2 of 2) for GMC Sierra HD 2008 2500:

1-2 shift solenoid (ss) valve
2-3 shift solenoid (ss) valve
3-2 shift solenoid (ss) valve
4.3l
Automatic transmission
Automatic transmission fluid pressure (tfp) manual valve position switch
Automatic transmission fluid temperature (tft) sensor
Automatic transmission shift lever
Body control module (bcm) (lower left side of dash)
Computer data lines system
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l
G201 (upper left corner of dash)
Hi spd gmlan +
Hi spd gmlan -
Input speed sensor (iss)
Instrument panel cluster (ipc)
J116
J126
J230
Lo gm gmlan
Logic
Mil ind
Mil ind ctrl
Mil sig
Nca
Pnk
Pressure control (pc) solenoid valve
Prnd321
Red
Replicated tos sign
Rev
Tan
Torque converter clutch (tcc) pulse width modulation (pwm) solenoid valve
Torque converter clutch (tcc) solenoid valve
Tow haul switch
Tow/ haul ind
Tow/haul sw sig

Transfer Case Wiring Diagram, 2-Speed Automatic for GMC Sierra HD 2008 2500

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List of elements for Transfer Case Wiring Diagram, 2-Speed Automatic for GMC Sierra HD 2008 2500:

(4.3l)
(4.8l, 5.3l, 6.0l & 6.2l)
(in instrument panel harness, in transfer case shift control module connector breakout) j207
(lower left side of dash)
2 hi ind ctrl
2-hi ind
2a4
4 hi ind ctrl
4 lo ind ctrl
4-hi ind
4-lo ind
4.3l
4wd ind
5 volt
6.0l (vin y), 4.3l, 4.8l & 5.3l
6.2l & 6.0l (vin k)
6.6l
8v sply
Acc wakeup serial data
Acc wakeup serial data x1
Accy wakeup srl data
Auto 4wd
Aux hvac-ign fuse 48 fuse 45 10a
Awd ind ctrl
Axle actr ctrl
Axle sw sig
Batt +
Body control module (lower left side of dash)
Brake control
Computer data lines system
Diesel
Dirtn sig
Engine control module (ecm) (left front of engine compt, near fan shroud)
Except 4.3l & 6.6l
Front axle actuator (on front axle assembly)
G102 (on lower left front of eng)
G107 (top left rear of eng)
G201 (upper left corner of dash)
G4 pnk
Gas
Gmlan bus +
Gmlan bus -
Gmlan bus-
Gnd
Hot at all times
Hot in acc or run
Hot w/ run/crnk relay energized
Ign
Ign volt
Incrmt encoder directn sig
Incrmt encoder impulse sig
Instrument cluster panel (ipc)
Interior lights system
J104 (in engine harness, 5 cm from engine control module connector breakout)
J105
J130 (4 speed a/t) pnk
J220 (w/ steering pnk
Left i/p junction block
Left i/p junction block (lower left side of dash)
Lo ref
Lock sol ctrl
Logic
Low ref
Misc ign fuse 43 fuse 40 10a
Mtr ctrl a
Mtr ctrl b
Neutral ind
Outside moisture sensor (near inside rearview mirror mount)
Pnk
Power distribution system
Pulse sig
Right i/p junction block (in right end of dash)
Rotary position sens sig
Shift motor
Sw sig
Tan
Trans ig1 fuse 19 fuse 13 15a
Transfer case 2/4 wheel drive actuator position sensor
Transfer case encoder motor (on transfer case)
Transfer case shift control module (lower left side of dash)
Transfer case shift control switch (on top left of transfer case)
Transmission control module (tcm) (left front of engine compt, near fan shroud)
Trec fuse 67 fuse 62 10a
Underhood fuse block (left side of engine compt)
W/ outside moisture sensor
W/o outside moisture sensor
Wheel heater)
X1 a3 pnk

Transfer Case Wiring Diagram, 2-Speed Manual for GMC Sierra HD 2008 2500

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List of elements for Transfer Case Wiring Diagram, 2-Speed Manual for GMC Sierra HD 2008 2500:

(4.3l)
(4.8l, 5.3l, 6.ol & 6.2l)
(diesel)
(gas) (diesel)
(lower left side of dash) left i/p junction block
(on lower left front of engine)
(top left rear of engine) g107
4.3l
4.8l, 5.3l, 6.0l & 6.2l
4wd ind
4wd low sig
Aux hvac-ign fuse 48 fuse 45 10a
Axle sw sig
Computer data lines system
Diesel
Engine control module (ecm) (left front of engine compt, near fan shroud)
Front axle actuator (on front axle assembly)
G102 g103 (on front of right cylinder head)
G201 (upper left corner of dash)
Gmlan bus +
Gmlan bus -
Hot w/ run/crnk relay energized
Ign
Instrument panel cluster (ipc)
J105
J130 (4 speed a/t)
J220 (w/ steering pnk
Logic
Pnk
Tan
Trans ign 1 fuse 19 fuse 13 10a
Transfer case shift control switch (on top left of transfer case)
Underhood fuse block (left side of engine compt)
Wheel heater)
X2 n4 pnk
X5 g4

WARNING SYSTEMS

Warning Systems Wiring Diagram, with AN3/DL3 (1 of 2) for GMC Sierra HD 2008 2500

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List of elements for Warning Systems Wiring Diagram, with AN3/DL3 (1 of 2) for GMC Sierra HD 2008 2500:

3b1
Auto
Battery (+)
Bcm fuse 10a
Body control module (bcm) (lower left side of dash)
Computer data lines system
Crew cab
Ctsy fuse 15a
Dim fuse 15a
Driver door latch assembly (rear of driver's door)
Driver door lock/ window switch
G103 (on front of right cylinder head)
G201 (upper left corner of dash)
G303 (on lower left "b" pillar)
G304 (on lower right "b" pillar)
Ground
Head
Headlamp & panel dimmer switch
Headlp sw headlp off sig
Headlp sw headlp on sig
Headlp sw park lamps sig
Hi spd gmlan bus (+)
Hi spd gmlan bus (-)
Hot at all times
I/p fuse block (left side of dash)
Ign iii
Is lps fuse 10a
J201
Left i/p junction block (lower left side of dash)
Left rear door ajar sw
Left rear door latch assembly (rear of left rear door)
Lf ajar sig
Lf open sig
Lo spd data
Lo spd gmlan serial data
Low ref
Lt stop trn fuse 15a
Off
Park
Park brake sw signal
Passenger door latch assembly (rear of passenger's door)
Passenger door lock/ window switch
Pnk
Rf ajar sig
Right i/p junction block (in right end of dash)
Right rear door ajar sw
Right rear door latch assembly (rear of right rear door)
Rt stop trn fuse 15a
Stop lamps fuse 15a
Tan

Warning Systems Wiring Diagram, with AN3/DL3 (2 of 2) for GMC Sierra HD 2008 2500

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List of elements for Warning Systems Wiring Diagram, with AN3/DL3 (2 of 2) for GMC Sierra HD 2008 2500:

(on master cylinder) brake fluid level switch
(w/ luxury edition) j204
Brake ind
Chime module (center of dash, behind radio)
Diesel
Dlis fuse 35 fuse 32 2a
Driver seat belt buckle
Driver seat belt sw sig
Driver seat belt switch
G201 (upper left corner of dash)
G301 (below left side of passenger's seat)
Gas
Hot at all times
Ignition switch
Inflatable restraint sensing & diagnostic module (sdm) (under driver's seat)
Instrument panel cluster (ipc)
Ipc fuse 46 fuse 43 10a
J212
J305 (w/o driver adjuster front seat: in driver seat harness, 12.5 cm from driver seat belt buckle) (w/ driver adjuster front seat: in driver seat harness, 4 cm in x303 breakout)
Key in ignition switch
Left i/p junction block
Left i/p junction block (lower left side of dash)
Lo spd data
Lo spd gmlan serial data
Logic
Low ref
Low tire pressure ind
Nca
Park brake switch (on park brake pedal assembly)
Pnk
Radio
Rdo fuse 42 fuse 39 15a
Seat belt ind
Serial data
Sound systems
Splice pack jx221 (in the i/p harness, behind left side of dash)
Splice pack jx339 (in body harness, below passenger seat)
Underhood fuse block (left side of engine compt)
W/ radio provisions
W/o radio provisions
X12

Warning Systems Wiring Diagram, without AN3/DL3 (1 of 2) for GMC Sierra HD 2008 2500

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List of elements for Warning Systems Wiring Diagram, without AN3/DL3 (1 of 2) for GMC Sierra HD 2008 2500:

(upper left corner of dash) g201
3a5
A6 tan
Auto
Battery (+)
Bcm fuse 10a
Body control module (bcm) (lower left side of dash)
Computer data lines system
Crew cab
Ctsy fuse 15a
Dim fuse 15a
Driver door latch assembly (rear of driver's door)
G103 (on front of right cylinder head)
G201 (upper left corner of dash)
G303 (on lower left "b" pillar)
G304 (on lower right "b" pillar)
Ground
Head
Headlamp & panel dimmer switch
Headlp sw headlp off sig
Headlp sw headlp on sig
Headlp sw park lamps sig
Hi spd gmlan bus (+)
Hi spd gmlan bus (-)
Hot at all times
I/p fuse block (left side of dash)
Ign iii
Is lps fuse 20a
J201
J502 (w/ power windows)
J602 (w/ power door lock control)
Left front door ajar sw
Left front door open sw
Left i/p junction block (lower left side of dash)
Left rear door ajar sw
Left rear door latch assembly (rear of left rear door)
Lo spd gmlan serial data
Lt stop trn fuse 15a
Off
Park
Park brake sw signal
Passenger door latch assembly (rear of passenger's door)
Pnk
Right front door ajar sw
Right i/p junction block (in right end of dash)
Right rear door ajar sw
Right rear door latch assembly (rear of right rear door)
Rt stop trn fuse 15a
Stop lamps fuse 15a
Tan
W/ electric door lock control
W/o electric door lock control
X3 b5 tan

Warning Systems Wiring Diagram, without AN3/DL3 (2 of 2) for GMC Sierra HD 2008 2500

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List of elements for Warning Systems Wiring Diagram, without AN3/DL3 (2 of 2) for GMC Sierra HD 2008 2500:

(on master cylinder) brake fluid level switch
(w/ luxury edition) j204
Brake ind
Chime module (center of dash, behind radio)
Diesel
Dlis fuse 35 fuse 32 2a
Driver seat belt buckle
Driver seat belt sw sig
Driver seat belt switch
G201 (upper left corner of dash)
G301 (below left side of passenger seat)
Gas
Hot at all times
Ignition switch
Inflatable restraint sensing & diagnostic module (sdm) (under driver's seat)
Instrument panel cluster (ipc)
Ipc fuse 46 fuse 43 10a
J212
J305 (w/o driver adjuster front seat: in driver seat harness, 12.5 cm from driver seat belt buckle) (w/ driver adjuster front seat: in driver seat harness, 4 cm in x303 breakout)
Key in ignition switch
Left i/p junction block
Left i/p junction block (lower left side of dash)
Lo spd data
Lo spd gmlan serial data
Logic
Low ref
Low tire pressure ind
Nca
Park brake switch (on park brake pedal assembly)
Pnk
Radio
Rdo fuse 42 fuse 39 15a
Seat belt ind
Serial data
Sound systems
Splice pack jx221 (in the i/p harness, behind left side of dash)
Splice pack jx339 (in body harness, below passenger seat)
Underhood fuse block (left side of engine compt)
W/ radio provisions
W/o radio provisions
X12