All Wiring Diagrams for Chevrolet Chevy Express G2012 1500 model

AIR CONDITIONING

Manual A/C Wiring Diagram, Cargo Van (1 of 3) for Chevrolet Chevy Express G2012 1500

List of elements for Manual A/C Wiring Diagram, Cargo Van (1 of 3) for Chevrolet Chevy Express G2012 1500:

(behind right kick panel) g304
(behind right side of dash, on hvac) air temperature actuator
A/c
Bi-lev
Blower motor (on right rear of engine compt, on evaporator case)
Blower motor relay
Blower motor resistor assembly (at right rear of engine compt, on evaporator case)
Body fuse block (under left front seat)
Def
Defogger control ind
Defogger switch
Defogger system
F2 x1
Floor
Front auxiliary hvac control assembly
Frt blwr fuse 74 40a
G102 (6.6l: left front lower side of engine block) (4.8l, 5.3l & 6.0l: on left rear of engine) (4.3l: right rear of engine)
G102 (left front lower side of engine block)
G348
Hot at all times
Hot w/ run relay k1 energized
Hvac 1 fuse 14 20a
Hvac 2 fuse 13 10a
Hvac cntrl fuse 25 10a
Hvac control assembly
Interior lights system
J102
J249
J314
Logic
Max a/c
Med
Mix-blend
Off
Rear blwr fuse 29 30a
Red
Splice block jx348 (attached to lower right "b" pillar part of g348)
Tan
Underhood fuse block (on left side of engine compt)
Vacuum pump (6.6l) (right front of engine compt, under battery)
Vent
W/ electric rear window defogger & power mirrors
X100
X205
X407
X409

Manual A/C Wiring Diagram, Cargo Van (2 of 3) for Chevrolet Chevy Express G2012 1500

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List of elements for Manual A/C Wiring Diagram, Cargo Van (2 of 3) for Chevrolet Chevy Express G2012 1500:

(attached to left inner frame rail, near fuel pump assembly) coolant heater fuel pump
(behind left kick panel) g302
(in rear hvac harness, 13 cm from auxiliary blower motor connector breakout) j405
(right front of engine compt, attached to bottom of coolant surge tank) (6.6l) engine coolant level switch
(w/o rv upfitter: in body harness, 31 cm from x304 breakout) (w/ rv upfitter: in body harness, 32 cm from x308 breakout)
5v ref
A/c low pressure switch (on side of accumulator)
Auxiliary air temperature actuator
Auxiliary blower motor (on auxiliary hvac)
Auxiliary blower motor high speed relay (left rear of passenger compt, attached to hvac module)
Auxiliary blower motor low speed relay (left rear of passenger compt, attached to auxiliary hvac module)
Auxiliary blower motor medium speed relay (left rear of passenger compt, attached to auxiliary hvac module)
Auxiliary blower motor resistor (on auxiliary heater motor)
Auxiliary mode actuator
Batt +
Computer data lines system
Coolant heater (6.6l w/ auxiliary fuel fired heater) (attached to the left front inner frame rail)
Coolant heater air temperature sensor
Coolant heater blower motor
Coolant heater combustion sensor
Coolant heater control module
Coolant heater glow plug
Coolant heater overheat temperature sensor
Coolant heater temperature sensor
Coolant level sw sig
Driver information center (dic) display
Engine coolant temperature gauge
Foh mdl fuse 35 15a
Fuel pump
G400 (on inner left rear frame rail)
G402 (on top of
Gnd
Hot at all times
Instrument panel cluster (ipc)
J244
J308 (w/o rv upfitter: in body harness, 5 cm from x304 breakout) (w/ rv upfitter: in body harness, 22 cm from x308 breakout)
J310
J311 (w/o rv upfitter: in body harness, 41 cm from x304 breakout) (w/ rv upfitter: in body harness, 22 cm from x308 breakout)
J402
J411
J412 (in rear hvac harness, 20 cm from auxiliary blower motor connector breakout)
J413 (in rear hvac harness, 24 cm from auxiliary blower motor breakout)
Left "d" pillar)
Logic
Low ref
Low spd gmlan serial data
Provisional
Serial +
Serial -
Serial data
Tan
Underhood fuse block (on left side of engine compt)
Volt
X100
X305
X319
X407

Manual A/C Wiring Diagram, Cargo Van (3 of 3) for Chevrolet Chevy Express G2012 1500

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List of elements for Manual A/C Wiring Diagram, Cargo Van (3 of 3) for Chevrolet Chevy Express G2012 1500:

(4.3l: at left front of engine) (4.8l, 5.3l & 6.0l: at lower right front of engine) (6.6l: top front of engine) a/c compressor clutch
(engine chassis harness, 4 cm from engine control module (ecm) x1 breakout) j145
(in chassis harness, 15 cm from coolant heater breakout) j119
+ - gmlan data
12v ref
4.3l
4.8l, 5.3l & 6.0l
5v ref
5v ref 1
6.6l
A/c cmprsr fuse 18 15a
A/c cmprsr relay 40
A/c refrigerant pressure sensor
A/c request sig
Body control module (bcm) (behind lower right side of dash)
Clutch rly ctrl
Computer data lines system
Cooling fan assembly (6.6l) (behind radiator)
Ctrl spd sig
Electronic brake control module (ebcm) (on left frame rail, near center of vehicle)
Engine control module (ecm)
Engine coolant temperature (ect) sensor (4.8l, 5.3l & 6.0l: at left front of engine) (4.3l: on left side of engine) (6.6l turbo: top of engine, near thermostat housing)
Except 6.6l
Fan cltch (ev) fuse 63 10a
G102 (6.6l: left front lower side of the engine block) (4.8l, 5.3l & 6.0l: on left rear of engine) (4.3l: right rear of engine)
Gmlan (+)
Gmlan (-)
Hot at all times
Hot w/ pwr/trn relay 49 energized
J102
Low ref
Pnk
Press sens
Sens sig
Serial data
Speed sig
Tan
Underhood fuse block (on left side of engine compt)
W/ auxiliary fuel fired heater
W/o auxiliary fuel fired heater
X100
X101
X111
X142

Manual A/C Wiring Diagram, Passenger Van (1 of 3) for Chevrolet Chevy Express G2012 1500

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List of elements for Manual A/C Wiring Diagram, Passenger Van (1 of 3) for Chevrolet Chevy Express G2012 1500:

(19 cm from x303 breakout)
(39 cm from x303 breakout)
(64 cm from x303 breakout)
(behind right kick panel) g304
(behind right side of dash, on hvac) air temperature actuator
(in upfitter hvac control harness, 88 cm from x303 breakout)
A/c
Auxiliary hvac control processor (w/ rv upfitter & swb passenger) (center front of headliner)
Bi-lev
Blower motor (on right rear of engine compt, on evaporator case)
Blower motor relay
Blower motor resistor assembly (at right rear of engine compt, on evaporator case)
Body fuse block (under left front seat)
Def
Defogger ind
Defogger switch
Defogger system
F2 x1
Floor
Front auxiliary hvac control assembly
Frt blwr fuse 74 40a
Frt dual mod sig
Frt temp dual sig
G102 (6.6l: left front lower side of engine block) (4.8l, 5.3l & 6.0l: on left rear of engine) (4.3l: right rear of engine)
G102 (left front lower side of engine block)
G348
G401 (on top of right "d" pillar)
Gnd
Hot at all times
Hot w/ run relay k1 energized
Hvac 1 fuse 14 20a
Hvac 2 fuse 13 10a
Hvac cntrl fuse 25 10a
Hvac control assembly
Ign
Interior lights system
J102
J249
J305
J306
J307
J314
J330
J354
Logic
Max a/c
Med
Mix blend
Mix blend def
Off
Rear
Rear auxiliary hvac control assembly
Rear blwr fuse 29 30a
Rear dual sig ctrl rear dual ctrl enable sig
Rear mod mtr sig
Red
Rr air temp mtr ctrl
Rr dual logic mod sig
Rr dual logic temp sig
Splice block jx348 (attached to lower right "b" pillar part of g348)
Tan
Underhood fuse block (on left side of engine compt)
Vacuum pump (6.6l) (right front of engine compt, under battery)
Vent
W/ electric rear window defogger & power mirrors
W/ rv upfitter
W/o rv upfitter
X100
X205
X407
X409
X420

Manual A/C Wiring Diagram, Passenger Van (2 of 3) for Chevrolet Chevy Express G2012 1500

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List of elements for Manual A/C Wiring Diagram, Passenger Van (2 of 3) for Chevrolet Chevy Express G2012 1500:

(attached to left
(attached to left inner frame rail, near fuel pump assembly) coolant heater fuel pump
(behind left kick panel) g302
(in rear hvac harness, 13 cm from auxiliary blower motor connector breakout) j405
(right front of engine compt, attached to bottom of coolant surge tank) (6.6l) engine coolant level switch
(w/ rv upfitter: in body harness, 22 cm from x308 breakout)
(w/ rv upfitter: in body harness, 32 cm from x308 breakout)
5v ref
A/c low pressure switch (on side of accumulator)
Auxiliary air temperature actuator
Auxiliary blower motor (on auxiliary hvac)
Auxiliary blower motor high speed relay (left rear of passenger compt, attached to hvac module)
Auxiliary blower motor low speed relay (left rear of passenger compt, attached to auxiliary hvac module)
Auxiliary blower motor medium speed relay (left rear of passenger compt, attached to auxiliary hvac module)
Auxiliary blower motor resistor assembly (on auxiliary heater motor)
Auxiliary mode actuator
Batt +
Computer data lines system
Coolant heater (6.6l w/ auxiliary fuel fired heater)
Coolant heater air temperature sensor
Coolant heater blower motor
Coolant heater combustion sensor
Coolant heater control module
Coolant heater glow plug
Coolant heater overheat temperature sensor
Coolant heater temperature sensor
Coolant level sw sig
Driver information center (dic) display
Engine coolant temperature gauge
Foh mdl fuse 35 15a
Front inner frame rail)
Fuel pump
G400 (on inner left rear frame rail)
G402 (on top of
Gnd
Hot at all times
Instrument panel cluster (ipc)
J244
J308 (w/o rv upfitter: in body harness, 5 cm from x304 breakout) (w/ rv upfitter: in body harness, 22 cm from x308 breakout)
J310
J311
J402
J411
J412 (in rear hvac harness, 20 cm from auxiliary blower motor connector breakout)
J413 (in rear hvac harness, 24 cm from auxiliary blower motor breakout)
Left "d" pillar)
Logic
Low ref
Low spd gmlan serial data
Provisional
Serial +
Serial -
Serial data
Tan
Underhood fuse block (on left side of engine compt)
Volt
X100
X205
X305
X319
X407

Manual A/C Wiring Diagram, Passenger Van (3 of 3) for Chevrolet Chevy Express G2012 1500

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List of elements for Manual A/C Wiring Diagram, Passenger Van (3 of 3) for Chevrolet Chevy Express G2012 1500:

(4.3l: at left front of engine) (4.8l, 5.3l & 6.0l: at lower right front of engine) (6.6l: top front of engine) a/c compressor clutch
(engine chassis harness, 4 cm from engine control module (ecm) x1 breakout) j145
(in chassis harness, 15 cm from coolant heater breakout) j119
+ gmlan data
12v ref
4.3l
4.8l, 5.3l & 6.0l
5v ref
5v ref 1
6.6l
A/c cmprsr fuse 18 15a
A/c cmprsr relay 40
A/c refrigerant pressure sensor
A/c request sig
Body control module (bcm) (behind lower right side of dash)
Clutch rly ctrl
Computer data lines system
Cooling fan assembly (6.6l) (behind radiator)
Ctrl spd sig
Electronic brake control module (ebcm) (on left frame rail, near center of vehicle)
Engine control module (ecm)
Engine coolant temperature (ect) sensor (4.8l, 5.3l & 6.0l: at left front of engine) (4.3l: on left side of engine) (6.6l: top of engine, near thermostat housing)
Except 6.6l
Fan cltch (ev) fuse 63 10a
G102 (6.6l: left front lower side of the engine block) (4.8l, 5.3l & 6.0l: on left rear of engine) (4.3l: right rear of engine)
Gmlan (+)
Gmlan (-)
Hot at all times
Hot w/ pwr/trn relay 49 energized
J102
Low ref
Pnk
Press sens
Sens sig
Serial data
Speed sig
Tan
Underhood fuse block (on left side of engine compt)
W/ auxiliary fuel fired heater
W/o auxiliary fuel fired heater
X100
X101
X111
X142

Rear A/C Wiring Diagram, Provisions for Chevrolet Chevy Express G2012 1500

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List of elements for Rear A/C Wiring Diagram, Provisions for Chevrolet Chevy Express G2012 1500:

(behind lower right side of dash) body control module (bcm)
Body fuse block (under left front seat)
Dimming ctrl
G347
Harness, 5 cm from air temperature actuator connector breakout) j250
Hot at all times
Hot w/ run relay k1 energized
Hvac 2 fuse 13 10a
J356 (in body harness, 20 cm underhood fuse block breakout)
Provisional
Rear blwr fuse 29 30a
Splice block jx347 (in body harness, attached to lower left "b" pillar)
X319
X407
X409

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram, with JL4 (1 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Anti-lock Brakes Wiring Diagram, with JL4 (1 of 2) for Chevrolet Chevy Express G2012 1500:

12v ref
4.3l
5.3l, 4.8l & 6.0l
5v ref
6.6l
Abs mdl fuse 2 40a
Abs mtr fuse 1 50a
Brk sw fuse 13 10a
Can bus hi
Can bus hi data
Can bus lo
Can bus lo data
Computer data lines system
Diesel
Electronic brake control module (ebcm) (on left frame rail, near center of vehicle)
Engine control module (ecm) (left side of engine compt)
Except 6.6l
G300 (on left frame rail, near ebcm)
Gasoline
Gnd
Hi spd gmlan data +
Hi spd gmlan data-
Hot at all times
Hot w/ run/crnk relay 15 energized
Ipc fuse 10 10a
J315
Left front wheel speed sensor (wss) (on inside of left front wheel)
Left rear wheel speed sensor (wss) (at left rear wheel hub)
Lf wheel spd sens
Lo ref
Low ref
Lr wheel speed sens
Pnk
Red
Rf wheel spd sens
Right front wheel speed sensor (wss) (on inside of right front wheel)
Rr wheel speed sens
Serial data enable
Steering angle sens
Steering phase a
Steering phase c
Steering sens sig
Stop lamp switch (behind left side of dash, above brake pedal)
Str/whl snsr fuse 29 10a
Tan
Underhood fuse block (on left side of engine compt)
Vehicle spd sig
Vehicle speed signal
X100
X101
X105
X107 c5
X200
X221
X318
X413
Yaw & lateral acceleration sensor (under front passenger seat)

Anti-lock Brakes Wiring Diagram, with JL4 (2 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Anti-lock Brakes Wiring Diagram, with JL4 (2 of 2) for Chevrolet Chevy Express G2012 1500:

(behind left kick panel) g302
A12
A14
A16
Abs ind
Body control module (bcm) (behind lower right side of dash)
Brake booster fluid flow alarm switch (in power steering pump outlet hose)
Brake booster fluid pressure alarm switch (w/ brake warning indicate system) (in power steering pump inlet hose)
Brake fluid level switch (at left rear of engine compt)
Brake ind
Brake pressure differential switch (on brake valve, near front of ebcm)
Brake warning indicator ctrl
Brk fluid level sensor sig
Computer data lines system
Dimming ctrl
E10
G103 (4.3l: left rear of engine) (4.8l, 5.3l & 6.0l: on right rear of engine) (6.6l: left front lower side of engine block)
G300 (on left frame rail, near ebcm)
G302 (behind left kick panel)
Gnd
Heavy duty
Ign volt
Instrument panel cluster (ipc)
J101
J202
J231 (in instrument panel harness, 5 cm from x200 breakout towards instrument panel cluster)
J244
J248
J250 (in dash harness, 5 cm from air temperature actuator connector breakout)
J315
Light duty
Lo spd gmlan
Logic
Low stability ind
Park brake switch (under left side of dash)
Pnk
Prk brk sw
Right rear wheel speed sensor (wss) (at right rear wheel hub)
Serial data
Steering sens a
Steering sens b
Steering sens c
Steering wheel speed/ position sensor (at base of steering column)
Tan
Tcc brake sig
Traction control switch
Traction sw
Vdc ind
X100
X101
X141
X200
X220
X414

Anti-lock Brakes Wiring Diagram, without JL4 for Chevrolet Chevy Express G2012 1500

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List of elements for Anti-lock Brakes Wiring Diagram, without JL4 for Chevrolet Chevy Express G2012 1500:

(on left frame rail, near ebcm) g300
4.3l
5.3l, 4.8l & 6.0l
6.6l
Abs ind
Abs mdl fuse 2 40a
Abs mtr fuse 1 50a
Body control module (bcm) (behind lower right side of dash)
Brake booster fluid flow alarm switch (in power steering pump outlet hose)
Brake booster fluid pressure alarm switch (w/ brake warning indicate system) (in power steering pump inlet hose)
Brake fluid level switch (at left rear of engine compt)
Brake ind
Brake pressure differential switch (on brake valve, near front of ebcm)
Brake warning indicator ctrl
Brk fluid level sensor sig
Brk sw fuse 13 10a
Computer data lines system
Electronic brake control module (ebcm) (on left frame rail, near center of vehicle)
Engine control module (ecm) (left side of engine compt)
Except 6.6l
G103 (4.3l: left rear of engine) (4.8l, 5.3l & 6.0l: on right rear of engine) (6.6l: left front lower side of engine block)
G300 (on left frame rail, near ebcm)
G302 (behind left kick panel)
Gnd
Heavy duty
Hi spd gmlan bus +
Hi spd gmlan bus -
Hot at all times
Hot w/ run/crnk relay 15 energized
Instrument panel cluster (ipc)
Ipc fuse 10 10a
J101
J231 (in instrument panel harness, 5 cm from x200 breakout towards instrument panel cluster)
J244
J315
Left front wheel speed sensor (wss) (on inside of left front wheel)
Lf wheel speed sens
Light duty
Lo spd gmlan
Logic
Low ref
Park brake switch (under left side of dash)
Pnk
Prk brk sw
Rf wheel spd sens
Right front wheel speed sensor (wss) (on inside of right front wheel)
Serial data enable
Stop lamp switch (behind left side of dash, above brake pedal)
Tan
Tcc brake sig
Underhood fuse block (on left side of engine compt)
Vehicle spd sig
Vehicle speed signal
X100
X101
X107
X141
X220
X221

ANTI-THEFT

Forced Entry Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Forced Entry Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2012 1500:

Battery b+
Body control module (bcm) (behind lower right side of dash)
Body fuse block (under left front seat)
Cargo dr unlck fuse 33 15a
Cargo dr unlck pcb relay k10b
Chime module (behind left center of dash)
Computer data lines system
Driv door lock rly
Driv door lock sig
Driv door unlock sig
Drv dr unlck fuse 36 15a
Drvr dr unlck pcb relay k9b
Frt dr lck fuse 31 15a
Frt pass dr unlck fuse 34 15a
Frt rear pass dr unlck pcb relay k9a
Ftr rear dr lck pcb relay k10a
G302 (behind left kick panel)
G347
G348
Ground
Hot at all times
J247
J248
Left rear side door jam switch (w/ hinged door) (at left "b" pillar)
Lf door ajar sw
Lf door open sw
Liftgate ajar sw sig
Lo spd
Lo spd gmlan serial data x3
Lr door open sw
Pass door lock sw
Radio
Rear dr lck fuse 32 15a
Rear open sw
Rear pass dr unlck fuse 35 15a
Remote control door lock receiver (rcdlr) (behind center of dash)
Rf door ajar sw
Rf door open sw
Rfa/tpm fuse 21 10a
Right rear side door jam switch (w/ cargo passenger) (at right "b" pillar)
Rr door open sw
Serial data
Splice block jx347 (in body harness, attached to lower left "b" pillar)
Splice block jx348 (in body harness, attached to lower right "b" pillar part of g348)
Tan
W/ commercial tradesman
W/ hinged door
W/o commercial tradesman
X318

Forced Entry Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Forced Entry Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2012 1500:

(in body harness, 40 cm from x306 breakout)
(in body harness, near front passenger seat, 20 cm from x306)
A11
B11
C10
C11
C12
Cargo door latch assembly (w/ cargo/passenger) (in right rear cargo door)
Cargo door lock switch
Cargo/ passenger
Class 2
Computer data lines system
Cutaway
Driver door latch assembly (at rear of driver door)
Driver door lock switch
Driver information center (dic)
G347
G348
G401 (on top of right "d" pillar)
Instrument panel cluster (ipc)
J322
J323
J501 (w/ electronic side door lock control)
J601 (w/ electronic side door lock control)
J901 (w/ electronic side door lock control)
Left rear side door lock actuator (w/ left rear hinged side door) (rear of left door)
Left side door contact plate (at left "b" pillar)
Logic
Passenger door latch assembly (at rear of front passenger door)
Passenger door lock switch
Right rear side door lock actuator (w/ rear hinged side door & rear sliding side door) (hinged: at left side of right door)
Right side door contact plate (at right "b" pillar)
Security indicator
Splice block jx347 (in body harness, attached to lower left "b" pillar)
Splice block jx348 (in body harness, attached to lower right "b" pillar part of g348)
Tan
W/ hinged door
W/ hinged doors
W/ sliding doors
X318
X400
X500
X600

Pass-Key Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Pass-Key Wiring Diagram for Chevrolet Chevy Express G2012 1500:

Acc
Body fuse block (under left front seat)
Computer data lines system
G302 (behind left kick panel)
Gnd
Hot at all times
Hot w/ run/crank relay 15 energized
Ign
Ign sw (dlis)/pk3 fuse 22 2a
Ign volt
Ignition switch
Instrument panel cluster (ipc)
Ipc fuse 10a
J202
J203
J205
Lo spd data
Lock
Logic
Pnk
Run
Security ind
Start
Theft deterrent module (tdm) (in steering column, near ignition key cylinder housing)
Underhood fuse block (on left side of engine compt)
X1 h7
X200
X3 a1

BODY CONTROL MODULES

Body Control Modules Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Body Control Modules Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2012 1500:

4.3l/5.3l
Acc panel lf rly ctrl
Acc panel lr rly ctrl
Acc panel rr rly ctrl
Accessory wakeup serial data
Anti-theft system
Backlight dimm ctrl
Batt pos volt
Bcm 1 fuse 59 10a
Bcm 2 fuse 58 10a
Bcm 3 fuse 26 10a
Bcm 4 fuse 9 10a
Bcm 5 fuse 7 10a
Bcm 6 fuse 72 10a
Body control module (bcm) (behind lower right side of dash)
Brake sw sense sig
Brk pos sense 5v ref
Brk pos sense low ref
Computer data lines system
Cruise control system
Cruise ctrl dimm sig
Dimm sw sig
Dimm volt ref
Exterior lights system
G103 (4.3l: left rear of engine) (5.3l: on right rear of engine)
G302 (behind left kick panel)
Gnd
Hdlp high beam rly ctrl
Hdlp low beam ctrl
Headlights system
High speed serial data bus (+)
High speed serial data bus (-)
Hood ajar sw sig
Hot at all times
Instrument cluster system
Interior lights system
J248
L trailer turn sig lamp
Local interconnect network 3
Low speed gmlan serial data
Power distribution system
R trailer turn sig lamp
Rf turn sig lamp ctrl
Run/crank rly coil ctrl
Serial data communication enable
Tan
Trunk, tailgate, fuel doors system
Underhood fuse block (on left side of engine compt)
Windshield washer rly ctrl
Wiper mtr park sw sig
Wiper/washer system
X100

Body Control Modules Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Body Control Modules Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2012 1500:

(or 690)
12 volt ref
5v ref
A/c request signal
A/t shift lock ctrl
Acc
Air conditioning system
Alarm enable signal
Ambient light sens sig
Anti-lock brakes system
Anti-theft system
Backup lamp rly ctrl
Batt pos volt
Bcm 7 fuse 8 10a
Body control module (bcm) (behind lower right side of dash)
Chmsl ctrl
Courtesy lamp ctrl
Courtesy lamps ctrl
Cruise control & sound systems
Cruise control system
Cruise ctrl sw sig
Current sens sig
Defeat sw sig
Dimm ctrl
Door locks & anti-theft systems
Drv door lock sw lock sig
Drv door lock sw unlock sig
Drv dr lock rly unlock ctrl
Exterior lights system
Flash to pass sw sig
Front wind wiper sw hi sig
Hdlp dimm low beam sig
Hdlp low beam rly ctrl
Hdlp off sig
Hdlp on sig
Headlights system
Hood cld sw sig
Horn rly ctrl
Horns system
Hot at all times
Ign volt
Ignition switch
Instrument cluster system
Interior lights system
J205
Key-in switch
L turn haz sw sig
Lf door ajar sw sig
Lf door open sw sig
Lf turn sig lamp ctrl
Liftgate ajar sw sig
Lo ref
Low ref
Lr door open sw sig
Lr turn sig lamp ctrl
Off
Park brake sw sig
Park lamp ctrl
Park lamps sig
Pass door lock sw lock ctrl
Pass dr lock sw unlock ctrl
Pnk
Power distribution system
R turn haz sw sig
Rear access open sw sig
Rf door ajar sw sig
Rf door open sw sig
Rr door open sw sig
Rr turn sig lamp ctrl
Run
Shift interlock system
Sound & cruise control systems
Start
Starting/ charging system
Steering wheel ctrl sig
Stop lamps ctrl
Tan
Tap up/tap down sw sig
Tcc brake sig
Tow/haul switch signal
Traction ctrl sw sig
Transmissions system
Underhood fuse block (on left side of engine compt)
Washer switch signal
Wiper high sw sig
Wiper low sw sig
Wiper sw sig 2
Wiper/washer system
X200

COMPUTER DATA LINES

Computer Data Lines Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Computer Data Lines Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2012 1500:

(behind left kick panel) g302
4.3l
4.8l, 5.3l & 6.0l
6.6l
Acc wake up serial data data bus (+)
B10
Chime module (behind left center of dash)
Cutaway
Data bus (+)
Data bus (-)
Data link connector (dlc) (under left side of dash)
Data link resistor
Digital radio receiver (s-band digital audio system) (left side of dash)
E13
Engine control module (ecm) (left side of engine compt)
Hot at all times
Inflatable restraint front passenger presence system (pps) sensor (on passenger's seat harness, near breakout for seat adjuster switch)
Inflatable restraint sensing & diagnostic module (sdm) (under left front seat)
Inflatable restraint vehicle rollover sensor (if equipped) (front center floor board, between front seats)
Instrument panel cluster (ipc)
J244
Jx250 (in dash harness, 20 cm from underhood pass through grommet)
Light duty w/o recreational vehicle, upfitter sales package
Ltr/dlc fuse 73 20a
Nitrogen oxides sensor 1 (top left rear side of engine)
Nitrogen oxides sensor 2 (middle of diesel particulate filter)
Radio
Reductant sensor module (above reductant tank)
Remote control door lock receiver (rcdlr) (if equipped) (behind center of dash)
Serial data
Splice pack jx200 (in dash wiring harness, 10 cm from underhood pass- through grommet breakout)
Tan
Theft deterrent module (tdm) (in steering column, near ignition key cylinder housing)
Underhood fuse block (on left side of engine compt)
Vechicle communication interface module (vcim) (if equipped) (below steering column)
W/ radio
W/o radio
X100
X101
X115
X200
X3 g1
X306
X318
X395

Computer Data Lines Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Computer Data Lines Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2012 1500:

(6.6l)
(in engine harness, 15 cm from x101 breakout) j115
(left rear of engine) (6.6l) glow plug control module (gpcm)
4.3l & 5.3l
4.8l & 6.0l
5.3l
6.6l
Acc wake up
Acc wake up serial data
Automatic transmission (6 speed a/t)
Body control module (bcm) (behind lower right side of dash)
Brake control
Comm
Control solenoid value assembly
Coolant heater (6.6l & w/ fuel fired auxiliary heater) (attached to the left front inner frame rail)
Data bus (+)
Data bus (+) data bus (-) x2
Data bus (-)
Data bus (-) data bus (+)
Data bus (-))
Data comm
Data enable
Electronic brake control module (ebcm) (on left frame rail, near center of vehicle)
Enable
Enable(-)
Except
Except 5.3l
Except 6.6l
Fuel pump flow control module (at rear of vehicle, attached to left rear frame rail)
Ign
J119 (w/ fuel fired auxiliary heater) (in chassis harness, 15 cm from coolant heater breakout)
J319 (in chassis harness, 7 cm from ecbm breakout)
Pnk
Serial data
Tan
Transmission control module (tcm) (4 speed a/t) (left front corner of engine compt)
Vehicle communication interface module (vcm) (below steering column)
W/ active
W/ active brake control
W/ fuel fired auxiliary heater
W/ vechile communication system
W/o active
W/o active brake control
W/o fuel fired auxiliary heater
W/o vechile communication system
X100
X101
X105
X107
X174
X174 r

CRUISE CONTROL

Cruise Control Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Cruise Control Wiring Diagram for Chevrolet Chevy Express G2012 1500:

(6 speed a/t)
(or pnk)
12v ref
4.3l
4.8l, 5.3l & 6.0l
5v ref
5v ref 1
5v ref 2
6.6l
A13
A17
Accelerator pedal position (app) sensor (under left side of dash)
App sen 1 sig
App sen 2 sig
Automatic transmission
Automatic transmission output shaft speed (oss) sensor
Automatic transmission output shaft speed (oss) sensor assembly
Batt +
Bcm 2 fuse 58 15a
Body control module (bcm) (behind lower right side of dash)
Brake low ref
Brake pedal position (bpp) sensor (top of brake pedal assembly)
Brake sens sig
Cancel
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 -
Ecm batt fuse 19 10a
Engine control module (ecm)
Fuel tem sig
G103 (4.3l: left rear of engine) (4.8l, 5.3l & 6.0l: on right rear of engine)
G109
G302 (behind left kick panel)
Gmlan
Ground
Hi spd gmlan ser data bus(+)
Hi spd gmlan ser data bus(-)
Hot at all times
Hot w/ run/crank relay 15 energized
Ign
Inflatable restraint steering wheel module coil (at top of steering column)
Instrument panel cluster (ipc)
Ipc fuse 10 10a
J101
J127
J160
J209 (in steering wheel harness, near x200 connector)
J244
J248
Left steering wheel control switch
Logic
Low ref
Pnk
Red
Res+
Ser data bus(+)
Ser data bus(-)
Set-
Sound systems
Tac motor ctrl 1
Tac motor ctrl 2
Tan
Throttle body (except 6.6l)
Tp sens 1 sig
Tp sens 2 sig
Trans- missions system
Transmission control module (4 speed a/t) (6.6l: left front corner of engine compt)
Transmission control module (tcm)
Underhood fuse block (on left side of engine compt)
Vss high sig
Vss low sig
W/ radio redundant steering wheel control
W/o radio redundant steering wheel control
X100
X103
X107
X200

DEFOGGERS

Defoggers Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Defoggers Wiring Diagram for Chevrolet Chevy Express G2012 1500:

(w/ rear window defogger & power mirrors) hvac control assembly
A x2
Body fuse block (under left front seat)
Defogger ind
Driver outside rearview mirror (in driver door)
G302 (behind left kick panel)
G304 right (behind kick panel)
G347
G348
G401 (on top of right "d" pillar)
G402 (on top of left "d" pillar)
Ger grid
Ground
Hot at all times
Hvac cntrl fuse 10a
Ign
J247
J249
J401
J500
J600
J902
Left rear window defog- ger grid
Left rear window defogger grid
Logic
Mega fuse 125a
Nca
Osrvm htr fuse 20a
Passenger outside rearview mirror (in right front passenger door)
Rear defog fuse 18 30a
Rear defog relay k5 (w/ electric rear window defogger & power mirrors)
Rear window defogger switch
Right rear window defog-
Right rear window defogger grid
Rr defog rly pwr
Splice block jx347 (in body harness, attached to lower left "b" pillar)
Splice block jx348 (in body harness, attached to lower right "b" pillar part of g348)
Stationary rear door window
Swing out rear door window
Underhood fuse block (on left side of engine compt)
X1 a
X1 c4
X1 e2
X2 a
X3 d
X411 d
X411 e
X412 b
X500
X600
X901 a
X901 b
X902 a
X902 b

ENGINE PERFORMANCE

4.3L VIN X

4.3L VIN X, Engine Performance Wiring Diagram (1 of 3) for Chevrolet Chevy Express G2012 1500

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List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (1 of 3) for Chevrolet Chevy Express G2012 1500:

(cutaway: in chassis harness, 87 cm from ebcm connector breakout) (passenger/cargo: in chassis harness, 44 cm from ebcm connector breakout)
(in exhaust pipe, in back of catalytic converter) heated oxygen sensor (ho2s) bank 1 sensor 2
(in exhaust pipe, in back of catalytic converter) heated oxygen sensor (ho2s) bank 2 sensor 2
5v ref 2
A/c refrigerant pressure sensor
Acc wak ser data
Accelerator pedal position (app) sensor (under left side of dash)
Air conditioning system
Anti-lock brakes system
App sens 2 sig
App sensor 1 sig
Batt pos volt
Brake pedal position (bpp) sensor (top of brake pedal assembly)
Brk sens sply
Clutch rly ctrl
Computer data lines system
Ecm batt fuse 19 10a
Ecm ign/ glow plug mdl ign fuse 30 15a
Engine control module (ecm) (left side of engine compt)
Fuel lvl sens sig
Fuel pump & sender assembly (on fuel tank)
Fuel tank pressure (ftp) sensor (on fuel tank)
G400 (on inner left rear frame rail)
Gmlan ser data+
Gmlan ser data-
Ho2s hi sig
Ho2s lo ctrl
Ho2s lo sig
Hot at all times
Hot w/ run/ crnk relay 15 energized
Ign
Ign volt
Instrument panel cluster (ipc)
J301
Logic
Low ref
Maf sens sig
Malfunction indicator lamp
Mil ctrl
Nca
Pnk
Pnk pnk
Press sens sig
Pressure ind low engine oil
Pump rly ctrl
Pwrtrn rly ctrl
Starter rly ctrl
Starting/ charging system
Tan
Tan c
Tos signal
Transmissions system
Underhood fuse block (on left side of engine compt)
Vss signal
X100
X101
X103

4.3L VIN X, Engine Performance Wiring Diagram (2 of 3) for Chevrolet Chevy Express G2012 1500

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List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (2 of 3) for Chevrolet Chevy Express G2012 1500:

(in engine harness, 16 cm from underhood fuse block x1 breakout) j123
(on top of engine, near throttle body) evaporative emission (evap) canister purge solenoid
5v ref 1
Brk aply sens sig
Brk sw fuse 13 10a
Cnstr vent sol fuse 56 10a
Ecm pwr/trn fuse 78 10a
Engine control module (ecm) (left side of engine compt)
Engine oil pressure (eop) sensor (on top rear of engine)
Evap sol ctrl
Evaporative emission (evap) canister vent solenoid valve (near front of fuel tank)
Exterior lights system
Fuel pump relay
G102 (right rear of engine)
G103 (left rear of engine)
Gas fuel pump fuse 24 30a
Hot at all times
Hot w/ run/ crnk relay 15 energized
Iat sens sig
Ign volt
J101
J102
J151
Maf/ cnstr vent fuse 64 15a
Manifold absolute pressure (map) sensor
Mass air flow (maf)/intake air temperature (iat) sensor (attached to air intake duct) intake air temperature (iat)/ mass air flow (maf) sensor (integral w/ mass airflow sensor)
O2 snsr 1 (pre)/cls fuse 77 10a
O2 snsr 2 (post) fuse 62 10a
Odd ign/inj fuse 65 20a
Park/neutral sig
Pnk
Pwr/trn relay 49
Stop lamp switch (behind left side of dash, above brake pedal)
Tan
Tcc brake sig
Transmissions system
Underhood fuse block (on left side of engine compt)
V6 fuel inj fuse 75 15a
X100
X101
X221

4.3L VIN X, Engine Performance Wiring Diagram (3 of 3) for Chevrolet Chevy Express G2012 1500

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List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (3 of 3) for Chevrolet Chevy Express G2012 1500:

(at top of engine) central sequential fuel injection (central sfi)
(inside intake manifold at cylinder) fuel injectors
5v ref 1
5v ref 2
Camshaft position (cmp) sensor (part of distributor, top rear of engine)
Ckp sens sig
Cmp sens sig
Crankshaft position (ckp) sensor (on lower front of engine, near crankshaft)
Ect sens sig
Engine control module (ecm) (left side of engine compt)
Engine coolant temperature (ect) sensor (on left side of engine)
Evap sol ctrl
G103 (left rear of engine)
Gen field sig
Gen on sig
Gnd
Gnd e
Heated oxygen sensor (ho2s) bank 1 sensor 1 (in exhaust pipe, in front of catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 1 (in exhaust pipe, in front of catalytic converter)
Ho2s hi sig
Ho2s lo ctrl
Ho2s lo sig
Ic 1 ctrl
Ic 2 ctrl
Ic 3 ctrl
Ic1 ctrl b
Ic3 ctrl c
Ign volt f
Ignition control module (icm) (on top right side of engine, ic2 ctrl at ignition coil)
Inj 1 ctrl
Inj 2 ctrl
Inj 3 ctrl
Inj 4 ctrl
Inj 5 ctrl
Inj 6 ctrl
J101
J102
J120
J150
Knock sensor (ks) 1
Knock sensor (ks) 2
Ks 1 sig
Ks 2 sig
Low ref
Low ref d
Map sens sig
Nca
Pnk
Pnk d
Red
Sens sig
Starting/charging system
Tac mtr 1
Tac mtr 2
Tan
Tan a
Throttle body
Tp sens 1
Tp sens 2
X176

5.3L VIN 4

5.3L VIN 4, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Chevy Express G2012 1500

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List of elements for 5.3L VIN 4, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Chevy Express G2012 1500:

(5.3l)
(at left front of engine)
(cutaway: in chassis harness, 87 cm from ebcm connector breakout) (passenger/cargo: in chassis harness, 44 cm from ebcm connector breakout)
(in engine harness, 16 cm from underhood fuse block x1 breakout) j123
(in exhaust pipe, in back of catalytic converter) heated oxygen sensor (ho2s) bank 1 sensor 2
(in exhaust pipe, in back of catalytic converter) heated oxygen sensor (ho2s) bank 2 sensor 2
(in instrument panel harness, 5 cm from x200 breakout towards instrument panel cluster)
(or 6049)
(or pnk)
5.3l
5v ref 1
5v ref 2
A/c refrigerant pressure sensor
Acc ser data
Accelerator pedal position (app) sensor (under left side of dash)
Anti-lock brakes system
App sens 1 sig
App sens 2 sig
Batt pos volt
Brake pedal position (bpp) sensor (top of brake pedal assembly)
Brk sens sig
Brk sens sply
Brk sw fuse 13 10a
Computer data lines system
Cutaway
Ecm batt fuse 19 10a
Ecm ign/ glow plug mdl ign fuse 30 15a
Ect sens sig
Engine control module (ecm) (left side of engine compt)
Engine coolant radiator temperature sensors
Except 5.3l
Exterior lights system
Fuel level sens
Fuel pump & sender assembly (on fuel tank)
Fuel tank pressure (ftp) sensor (on fuel tank)
G103 (on right rear of engine)
Gmlan data+
Gmlan data-
Ho2s hi sig
Ho2s lo sig
Hot at all times
Hot w/ run/ crnk relay 15 energized
Iat sens sig
Ign volt
J101
J231
J301
Low ref
Maf sens sig
Mass air flow (maf)/intake air temperature (iat) sensor (attached to air intake duct) intake air temperature (iat)/ mass air flow (maf) sensor (integral w/ mass airflow sensor)
Park/neutral sig
Pnk
Press sens sig
Pwrtrn rly ctrl
Relay ctrl
Start rly ctrl
Starting/ charging system
Stop lamp switch (behind left side of dash, above brake pedal)
Tan
Tcc brake sig
Transmissions system
Underhood fuse block (on left side of engine compt)
Vss
X100
X101
X103
X128
X150
X221

5.3L VIN 4, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Chevy Express G2012 1500

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List of elements for 5.3L VIN 4, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Chevy Express G2012 1500:

(on left rear of engine) g102
(on right rear of engine) g103
(or pnk)
4.8l/6.0l
5.3l
Clutch rly ctrl
Cnstr vent sol fuse 56 10a
Computer data lines system
Ecm pwr/trn fuse 78 10a
Engine control module (ecm) (left side of engine compt)
Evap sol ctrl
Evaporative emission (evap) canister vent solenoid (near front of fuel tank)
Even ign/ inj fuse 79 20a
Fuel pump relay 38 (4.8l/6.0l)
G400 (on inner left rear frame rail)
Gas fuel pump fuse 24 30a
Gnd
Ho2s hi sig
Ho2s lo ctrl
Hot at all times
Ic 1 ctrl
Ic 2 ctrl
Ic 3 ctrl
Ic 4 ctrl
Ic 5 ctrl
Ic 6 ctrl
Ic 7 ctrl
Ic 8 ctrl
Ign
Instrument panel cluster (ipc)
J101
J102
Logic
Low engine oil pressure ind
Low ref
Maf/ cnstr vent fuse 64 15a
Malfunction indicator lamp
Mil ctrl
O2 snsr 1 (pre)/cls fuse 77 10a
O2 snsr 2 (post) fuse 62 10a
Odd ign/inj fuse 65 20a
Pnk
Pwr/trn relay 49
Tos sig
Transmissions system air conditioning system
Underhood fuse block (on left side of engine compt)
X100
X101
X127

5.3L VIN 4, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Chevy Express G2012 1500

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List of elements for 5.3L VIN 4, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Chevy Express G2012 1500:

(at rear of vehicle, attached to left rear frame rail) (5.3l) fuel pump flow control module
(at top left of engine)
(in odd ignition/coil module jumper harness, on top left side of engine)
5v ref
Computer data lines system
Fcsm batt fuse 36 20a
Fscm ign fuse 6 10a
G102 (on left rear of engine)
G300 (on left frame rail, near ebcm)
Gmlan data +
Gmlan data -
Gnd
Hot at all times
Hot w/ run/ crnk relay 15 energized
Ign volt
Ignition coil/module 1
Ignition coil/module 3
Ignition coil/module 5
Ignition coil/module 7
J102
J182
J184 (in odd ignition/coil module jumper harness, on top left side of engine)
J315
Low ref
Nca
Pnk
Pnk d
Pnk pnk pnk pnk pnk pnk pnk pnk pnk
Pump ctrl
Red c
Relay ctrl
Sens sig
Serial data
Spark plug
Tan
Underhood fuse block (on left side of engine compt)
X126

5.3L VIN 4, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Chevy Express G2012 1500

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List of elements for 5.3L VIN 4, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Chevy Express G2012 1500:

(at top right of engine)
(in even ignition/coil module jumper harness, on top right side of engine)
(in even ignition/coil module jumper harness, on top right side of engine) j183
(on left side of intake manifold)
(on right side of intake manifold)
Engine oil pressure (eop) sensor (on top rear of engine)
Fuel injector 1
Fuel injector 2
Fuel injector 3
Fuel injector 4
Fuel injector 5
Fuel injector 6
Fuel injector 7
Fuel injector 8
Fuel rail pressure (fpr) sensor
G102 (on left rear of engine)
Ignition coil/module 2
Ignition coil/module 4
Ignition coil/module 6
Ignition coil/module 8
J102
J185
J188
Manifold absolute pressure (map) sensor (at top rear of engine, on intake manifold)
Nca
Pnk
Pnk d
Pnk pnk pnk pnk pnk pnk pnk pnk pnk
Red c
Spark plug
Tan
X127

5.3L VIN 4, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Chevy Express G2012 1500

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List of elements for 5.3L VIN 4, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Chevy Express G2012 1500:

(6.0l) camshaft position (cmp) actuator solenoid valve
(on top of engine, near throttle body) evaporative emission (evap) canister purge solenoid
5v ref 1
5v ref 2
Camshaft position (cmp) sensor (front of engine)
Cen field sig
Ckp sens sig
Cmp sens sig
Crankshaft position (ckp) sensor (on lower right rear of engine, near starter motor)
Ect sens sig
Engine control module (ecm) (left side of engine compt)
Engine coolant temperature (ect) sensor (at left front of engine)
Gen on sig
Heated oxygen sensor (ho2s) bank 1 sensor 1 (in exhaust pipe, in front of catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 1 (in exhaust pipe, in front of catalytic converter)
Ho2s hi sig
Ho2s lo ctrl
Ho2s lo sig
Inj 1 ctrl
Inj 2 ctrl
Inj 3 ctrl
Inj 4 ctrl
Inj 5 ctrl
Inj 6 ctrl
Inj 7 ctrl
Inj 8 ctrl
Intake sol
Knock sensor (ks) 1
Knock sensor (ks) 2
Ks 1 sig
Ks 2 sig
Low ref
Map sens sig
Pnk
Pnk d
Pre sens sig
Sol ctrl
Starting/ charging system
Starting/charging system
Tac mtr ctrl 1
Tac mtr ctrl 2
Tan
Tan a
Throttle body
Tp sens 1 sig
Tp sens 2 sig
X177

EXTERIOR LIGHTS

Backup Lamps Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Backup Lamps Wiring Diagram for Chevrolet Chevy Express G2012 1500:

(on right rear of engine) g103
(provisional)
Automatic transmission
Automatic transmission assembly (6 speed a/t)
Automatic transmission internal mode switch (ims)
Aux/trlr bck/up fuse 26 10a
Backup alarm (rear of vehicle on frame)
Bck/up lamp pcb relay k7
Body control module (bcm) (behind lower right side of dash)
Body fuse block (under left front seat)
Bus - data
Computer data lines system
Control solenoid valve assembly
Cutaway
D3 x3
Data bus +
Data bus - x3
G302 (behind left kick panel)
G400 (on inner left rear frame rail)
G401 (on top of right "d" pillar)
G402 (on top of left left "d" pillar)
Gmlan hi spd
Gnd
H x405
Hi spd gmlan data bus +
Hi spd gmlan serial data bus (+)
Hi spd gmlan serial data bus (-)
Hot at all times
J101
J247
J402
J403
J410
Left backup lamp (cargo/ passenger)
Left tail/ stop & turn signal lamp
Nca
Park/neutral position (pnp) switch
Red
Relay ctrl x2
Right backup lamp (cargo/ passenger)
Right tail/ stop & turn signal lamp
Sig a
Sig b
Sig c
Tail lamp bck/up fuse 27 10a
Tan
Trailer connector (if equipped)
Trans rng sw sig a
Trans rng sw sig b
Trans- mission control module (tcm)
Transmission control module (tcm) (4 speed a/t)
Underhood fuse block (on left side of engine compt)
W/ electrical backup alarm
X1 e2
X1 j5
X175
X401
X401 f
X402

Exterior Lamps Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Exterior Lamps Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2012 1500:

(in dash harness, 13 cm from radio breakout) j245
(in dash harness, 6 cm from radio breakout) j246
(provisional)
A x419
Alarm enable sig
Aux prk lamp fuse 3 15a
B3 x600
Bcm 6 fuse 72 10a
Bcm3 fuse 26 10a
Bcm5 fuse 7 10a
Body control module (bcm) (behind lower right side of dash)
Body fuse block (under left front seat)
Brake sig
Cargo/ passenger
Center high mounted stop lamp (chmsl)
Chmsl ctrl
Cutaway
Driver outside rearview mirror (in driver door)
Frt prk lamp fuse 4 10a
G302 (behind left kick panel)
G347
G348
G401 (on top of right "d" pillar)
G402 (on top of left "d" pillar)
Ground distribution system
Hazard sw sig
Hazard switch
Hot at all times
J202
J403
J403 (w/o rear window defogger)
J410
J500
J600
J902 (w/ rear window defogger)
Left
Left tail/stop & turn signal lamp
Lf turn sig lp ctrl
License lamp
Lr turn sig lp ctrl
Lt rear park lamp fuse 8 10a
Mega fuse 125a
Nca
Park lamp ctrl
Park lamps sig
Passenger outside rearview mirror (in right front passenger door)
Prk lamp relay k3
Rf turn sig lp ctrl
Right
Right tail/stop & turn signal lamp
Rr turn sig lp ctrl
Rt rear prk lamp fuse 7 10a
Splice block jx347 (in body harness, attached to lower left "b" pillar)
Splice block jx348 (in body harness, attached to lower right "b" pillar part of g348)
Stop lamps ctrl
Tan
Trailer tow circuit
Trlr prk lamp fuse 5 15a
Turn signal/ multi-function switch
Under- hood fuse block (on left side of engine compt)
Upftr park lamp fuse 6 10a
W/ ambulance & recreational vehicle sales package
W/ folding mirrors
X1 a5
X1 b5
X1 g3
X2 b4
X200
X3 j2
X318
X320
X320 x
X401
X402
X402 a
X412
X412 c (w/o rear window defogger)
X500

Exterior Lamps Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Exterior Lamps Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2012 1500:

(in engine harness, 16 cm from underhood fuse block x1 breakout) j123
(in forward lamp harness, 48 cm from left headlamp breakout) j121
(on inner left rear frame rail) g400
(provisional)
4 speed a/t
4.3l
6 speed a/t
6.6l
A x221
A5 x101
Auto
Automatic transmission
Aux stop lamp fuse 68 15a
Brk sw fuse 13 10a
Computer data lines system
Control solenoid valve assembly
Cutaway
E x405
Engine control module (ecm) (left side of engine compt)
Except 4.3l
G100 (on left front of engine compt)
G101 (on right front of engine compt)
G102 (4.8l, 5.3l & 6.0l: on left rear of engine) (6.6l: left front lower side of the engine block) (4.3l: right rear of engine)
G302 (behind left kick panel)
Head
Headlamp & panel dimmer switch
Hot at all times
Hot w/ run/crank relay 15 energized
Ign
Instrument panel cluster (ipc)
Ipc fuse 10 10a
J100
J102
J110
J231 (in instrument panel harness, 5 cm from x200 breakout towards instrument panel cluster)
J248
J402
Left front marker lamp
Left park/ turn signal lamp
Left turn ind
Logic
N x174
Off
Park
Pnk
Right front marker lamp
Right park/ turn signal lamp
Right turn ind
Ser data
Stop lamp switch (behind left side of dash, above brake pedal)
Stop lamps pcb relay
Transmission control module (tcm)
Underhood fuse block (on left side of engine compt)
X1 c7
X100
X2 a4
X2 e2
X2 f3
X3 a1
X3 c5
X3 h7
X3 j4
X4 c
X405 c
X405 f
X405 g

Trailer Tow Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Trailer Tow Wiring Diagram for Chevrolet Chevy Express G2012 1500:

Backup lamps circuit
Body control module (bcm) (behind lower right side of dash)
Body fuse block (under left front seat)
Computer data lines system
G302 (behind left kick panel)
G400 (on inner left rear frame rail)
Hi spd gmlan+
Hi spd gmlan-
Hot at all times
Hot w/ prk lamp relay k3 energized
J247
J402 (except 5.3l w/ backup alarm)
Lo spd gmlan
Lt stop/ trn trlr fuse 21 10a
Lt trailer turn signal lamp
Rt stop/ trn trlr fuse 3 10a
Rt trailer turn signal lamp
Tan
Trailer connector
Trlr lt stop/trn pcb relay k9
Trlr prk lamp fuse 13 15a
Trlr rt stop/trn pcb relay k18
Trlr wrg fuse 11 30a
Trlr wrg fuse 42 30a
Underhood fuse block (on left side of engine compt)
X1 b2
X2 a7
X2 e3
X2 e4
X3 b5
X3 c4
X3 g3

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 5) for Chevrolet Chevy Express G2012 1500

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List of elements for Ground Distribution Wiring Diagram (1 of 5) for Chevrolet Chevy Express G2012 1500:

(4.3l) ignition control module (icm)
(6.0l) primary fuel level sensor
(6.0l) secondary fuel level sensor
(6.6l) engine oil level (eol) switch
(6.6l) fan cltch (ev) relay
(6.6l) fuel pressure regulator 1 shield
(6.6l) fuel pressure regulator 2 shield
(6.6l) glow plug control module (gpcm)
(6.6l) vacuum pump
(6.6l) wait to start indicator
(in odd ignition/coil module jumper harness, on top left side of engine)
(manual a/c) a/c compressor clutch
(w/ chrome grille radiator) left high beam headlamp
(w/ chrome grille radiator) left low beam headlamp
(w/ engine remote start) hood ajar switch
(w/o chrome grille radiator) left headlamp
4.3l/6.6l
4.8l/5.3l/6.0l
Auxiliary battery
Battery
Battery current sensor (except 6.6l)
Blower motor resistor assembly
Crnk relay
Fuel pump relay
G100 (on left front of engine compt)
G102 (4.3l: right rear of engine) (4.8l, 5.3l & 6.0l: on left rear of engine) (6.6l: left front lower side of engine block)
G104
G105 (on right front frame rail, in engine compt)
G106 (on right front of engine compt)
G110 (lower left front of engine)
G120
G305 (6.6l) (left center outer frame rail, near secondary battery)
Horn assembly
Ignition coil 1
Ignition coil 2
Ignition coil 3
Ignition coil 4
Ignition coil 5
Ignition coil 6
Ignition coil 7
Ignition coil 8
J100
J102 (6 cm from map sensor breakout)
J164 (in engine jumper harness, 9 cm from x110 connector)
J176
J179 (in lpg main harness, at ground to lpg control module & wait to start lamp)
J183 (in even ignition/ coil module jumper harness, on top right side of engine)
J368 (in lpg chassis harness, 434 cm from g105)
J369 (in lpg chassis harness, 7.5 cm from primary fuel level sensor)
Left front marker lamp
Left park/turn signal lamp
Lpg bypass solenoid
Lpg control module
Nca
Nca nca
Primary fuel level sensor
Run/ crnk relay
Secondary fuel level sensor
Stop lamps pcb relay k11
Underhood fuse block (on left side of engine compt)
Underhood lamp
W/ 3 tank vehicle kit & lpg
W/ 4 tank complete vehicle kit
W/ 4 tank vehicle kit & lpg
Wait to start indicator
Windshield wiper motor
Wiper diode
Wiper hi diode
Wpr pcb relay k13
X100
X109
X126
X127

Ground Distribution Wiring Diagram (2 of 5) for Chevrolet Chevy Express G2012 1500

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List of elements for Ground Distribution Wiring Diagram (2 of 5) for Chevrolet Chevy Express G2012 1500:

(4 speed a/t) automatic transmission
(4 speed a/t) transmission control module (tcm)
(4.3l)
(6 speed a/t) automatic transmission
(except 6.6l) engine control module (ecm)
(except 6.6l) mass air flow (maf)/ intake air temperature (iat) sensor
(heavy duty) brake fluid level switch
(if equipped) backup alarm
(in lpg chassis harness, 30.5 cm from primary liquid propane delivery module)
(not used) g
4.3l/5.3l
4.8l & 6.0l
4.8l, 6.ol, 4.3l w/o hd truck trailer
5.3l w/ hd truck trailer w/o backup alarm
6.6l
Body control module (bcm)
Cng control module
Control solenoid valve assembly
Coolant heater
Coolant heater fuel pump
Engine control module (ecm)
Except 5.3l w/ hd truck trailer
Except 5.3l w/ hd truck trailer & backup alarm
Exhaust gas recirculation (egr) valve shield
Fuel filter pressure switch
Fuel heater
Fuel pressure regulator 1 shield
Fuel pressure regulator 2 shield
Fuel pump
Fuel pump & sender assembly
G103 (4.3l: left rear of engine) (4.8l, 5.3l & 6.0l: on right rear of engine) (6.6l: left front lower side of engine block)
G109 (6.6l) (lower right front of engine)
G350 (rear of transmission case)
G400 (on inner left rear frame rail)
Glow plug control module (gpcm)
H x1
Intake air valve shield
J160 (in engine harness, 5.5 cm from x110 breakout)
J161 (in engine harness, 6.5 cm from engine control module x2 connector breakout)
J162 (in engine harness, 10 cm from g109 breakout)
J163 (in engine harness, 23 cm from g109 breakout)
J316 (in transmission harness, 20 cm (7.87 in) from x174)
J402 (cutaway: in chassis harness, 24 cm from g400 breakout) (passenger/cargo: in chassis harness, 16 cm from g400 breakout)
J430 (in lpg fuel tank harness, 1778mm from x350) x350
Lpg cut off solenoid valve
Nca
Park/ neutral position (pnp) switch
Primary lpg pump assembly
Reductant line heater
Reductant pump
Reductant sensor module
Reductant tank heater
Secondary lpg pump assembly
Trailer connector b
W/ 3 tank complete vehicle kit & lpg
W/ 4 tank complete vehicle kit
W/ cargo 6.6l, except 5.3l w/ hd truck trailer & backup alarm
W/ dedicated cng
W/ fuel fired auxiliary heater
W/o dedicated cng
X1 (4.8l/5.3l/ 6.0l)
X100
X101
X174
X305
X316
X350
X395
X405

Ground Distribution Wiring Diagram (3 of 5) for Chevrolet Chevy Express G2012 1500

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List of elements for Ground Distribution Wiring Diagram (3 of 5) for Chevrolet Chevy Express G2012 1500:

(6.6l) engine coolant level switch
(if equipped) on star button assembly
(if equipped) radio
(if equipped) vehicle communication interface module (vcim)
(in dash harness, 36 cm from x200 breakout) j247
(in dash harness, 5 cm from inflatable restraint i/p module connector breakout)
(not used)
(rv upfitter & ambulance upfitter) upftr ctsy lamps pcb relay k8
(rv upfitter, cutaway upfitter & ambulance upfitter) upftr aux2 relay k4
(w/ active brake control) traction control switch (tcs)
(w/ brake warning indicator) brake booster fluid flow alarm switch
(w/ cigarette lighter ashtray) cigar lighter (w/o cigarette lighter ashtray) center console 1 accessory power outlet
(w/ digital audio) digital radio receiver
(w/ rear window defogger & power mirrors) rear defog relay k5
(w/o radio) chime module
Air temperature actuator
Ambient light sensor
Automatic transmission shift lock control solenoid
Bck/up lamp pcb relay k7
Body control module (bcm)
Body fuse block (under left front seat)
Body fuse block (under left x1 front seat)
Cargo dr unlck pcb relay k10b
Center console 2 accessory power outlet
Communication system
Data link connector (dlc)
Driver information center (dic) switch
Drvr dr unlck pcb relay k9b
Electronic compass module
Ftr rear dr lck pcb relay k10a
Ftr rear pass dr unlck pcb relay k9a
G301 (behind left kick panel)
G302 (behind left kick panel)
G304 (behind right kick panel)
Headlamp & panel dimmer switch
Heavy duty
Horn switch
Hvac control assembly
Inflatable restraint front passenger presence system (pps) sensor
Inflatable restraint i/p module disable switch
Inflatable restraint i/p module indicator
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint steering wheel module coil
Inflatable restraint vehicle rollover sensor
Instrument panel cluster (ipc)
J202 (in steering column harness, 25 cm from x200 connector)
J210 (in steering wheel harness, near x200 connector)
J244 (in instrument panel harness, 5 cm from x200 breakout towards instrument cluster panel)
J248 (in dash harness, 8 cm from x200 breakout)
J264 (in steering column harness, 29 cm from x200)
J265 (in instrument panel harness)
J271 (in instrument panel harness, 7.5 cm from vehicle communication interface module breakout)
Left steering wheel control switch
Rap relay k6
Redundant radio steering wheel controls
Remote control door lock receiver (rcdlr)
Right steering wheel control switch
Run relay k1
Rv upfitter
Steering wheel speed/ position sensor
Theft deterrent module
Tow/ haul switch
Turn signal/ multi-function switch
W/ automatic electronic cruise control
W/ automatic electronics cruise control &
W/ compass display
W/ electric side door lock control
W/ radio
W/ rear window defogger & power mirrors
W/ redundant radio steering wheel control
W/ remote keyless entry & low tire pressure indicator
W/ vechicle
W/o automatic electronics cruise control &
W/o manual suppression switch & rv upfitter
W/o vechicle
Windshield washer fluid pump
Windshield wiper motor
X100
X141
X200
X205
X222
X306
X318

Ground Distribution Wiring Diagram (4 of 5) for Chevrolet Chevy Express G2012 1500

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List of elements for Ground Distribution Wiring Diagram (4 of 5) for Chevrolet Chevy Express G2012 1500:

(if equipped) auxiliary blower motor switch
(if equipped) driver seat adjuster switch
(if equipped) passenger seat adjuster switch
(not used) c
(passenger/ cargo) right rear door jamb switch
(w/ auxiliary heater plumbing & wiring) (not used) b
(w/ left rear hinged door) left rear door jamb switch
Auxiliary hvac control module
Cm from front courtesy breakout)
Cutaway upfitter
Dome lamp
Driver door latch
Driver door lock switch
Driver outside rearview mirror
Driver window switch
E x319
Front auxiliary hvac control assembly
Front dome/ reading lamps
G347 (on bottom of left "b" pillar)
G348 (right side of passenger compt, lower right of "b" pillar)
If equipped
J500 (in left front door harness, 6 cm from left front door speaker breakout)
J501 (in left front door harness, 7 cm from left front door speaker breakout)
J600 (in right front door harness, 7 cm from right front door speaker breakout)
J601 (in right front door harness, 5 cm from passenger outside rearview mirror breakout)
Left sunshade
Left vanity mirror lamp
Nca
Outside rearview mirror switch
Passenger door latch
Passenger door lock switch
Passenger outside rearview mirror
Passenger window switch
Rear auxiliary hvac control assembly
Right sunshade
Right vanity mirror lamp
Rv upfitter
Rv upfitter (not used) p
Splice block jx347
Splice block jx348
W/ electric side door lock control
W/ power mirrors & windows
W/ rear a/c & front vanity mirror w/o rv upfitter
W/ rear a/c & rv upfitter
W/ rear a/c & rv upfitter & swb passenger
W/ rear a/c w/o rv upfitter
W/o electric side door lock control
W/o power mirrors & windows
W/o rear a/c & front vanity mirror w/ cutaway upfitter
X205
X306
X307
X320
X321
X409
X500
X600

Ground Distribution Wiring Diagram (5 of 5) for Chevrolet Chevy Express G2012 1500

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List of elements for Ground Distribution Wiring Diagram (5 of 5) for Chevrolet Chevy Express G2012 1500:

(5.3l) fuel pump flow control module
(cargo w/o rv upfitter) dome lamp
(light duty) brake pressure differential switch
(w/ chrome grille radiator) right high beam headlamp
(w/ chrome grille radiator) right low beam headlamp
(w/o chrome grille radiator) right headlamp
Auxiliary air temperature actuator
Auxiliary blower motor
Auxiliary mode actuator
B x409
Cargo door latch
Cargo door lock switch
Center high mounted stop lamp (chmsl)
Dome lamp
Door window
Door window stationary rear
Electronic brake control module (ebcm)
Front cargo fluorescent work lamp
Fuel filter pressure switch
G101 (on right front of engine compt)
G111 (6.6l)
G300 (on left frame rail, near ebcm)
G401 (on top of right "d" pillar)
G402 (on top of left "d" pillar)
G403 (w/ commercial tradesman sales package) (on center of left "d" pillar)
J110 (in forward lamp harness, 12 cm from left headlight connector breakout)
J300 (in prp/uf2 harness, 42 cm from left front side front access panel actuator)
J315 (in chassis harness, 10 cm from g300 breakout)
J330 (in rear headliner harness, 30 cm from x420)
J403 (in body harness, 6 cm from g401 breakout)
J410 (in body harness, 47 cm from x401 breakout)
J411 (in rear hvac harness, 6 cm from auxiliary blower motor connector breakout)
J901 (in rear cargo door harness, 35 cm from x902)
J902 (in right rear door harness, 19 cm from license lamp connector breakout)
Left backup lamp
Left front access panel fluorescent work lamp
Left front side front access panel actuator
Left front side rear access panel actuator
Left rear access panel fluorescent work lamp
Left rear side front access panel actuator
Left rear side rear access panel actuator
Left rear window defogger grid
Left tail/stop & turn signal lamp
License lamp
Middle dome/ reading lamps
Nca
Passenger
Rear auxiliary hvac control assembly
Rear cargo fluorescent work lamp
Rear dome/ reading lamps
Right access panel fluorescent work lamp
Right backup lamp
Right front marker lamp
Right park/turn signal lamp
Right rear window defogger grid
Right side front access panel actuator
Right side rear access panel actuator
Right tail/stop & turn signal lamp
Swing out rear
W/ auxiliary heater & rear a/c
W/ auxiliary heater w/o rear a/c
W/ auxiliary heater, rear a/c & rear window defogger
W/ cargo lamps
W/ electric side door lock control
W/ rear a/c
W/ rear a/c & swb
W/ rear window defogger
W/o active brake control w/ active brake control
W/o auxiliary heater & rear a/c
W/o electric side door lock control
W/o rear window defogger
X400
X401
X402
X409
X411
X412
X420
X901
X902

HEADLIGHTS

Headlights Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Headlights Wiring Diagram for Chevrolet Chevy Express G2012 1500:

Ambient light sensor (on top of instrument panel)
Ambient sens sig
Auto
Body control module (bcm) (behind lower right side of dash)
Computer data lines system
Drl 1 fuse 67 15a
Drl 2 fuse 66 10a
Drl pcb relay k19
Ftp
Fusible link 2
G100 (on left front of engine compt)
G101 (on right front of engine compt)
G302 (behind left kick panel)
Head
Headlamp & panel dimmer switch
Headlamp lo sig
Headlamp sw sig
Hi beam rly ctrl
High beam ind
High beam pcb relay k7
Hot at all times
Hot w/ run/crnk relay 15 energized
Ign
Instrument panel cluster (ipc)
Ipc fuse 10 10a
J110
J118
J202
J248
Left headlamp
Left high beam headlamp
Left low beam headlamp
Lo beam ctrl
Lo beam rly ctrl
Logic
Low
Low beam pcb relay k6
Lt hi beam fuse 51 10a
Lt lo beam fuse 53 10a
Off
Park
Park brake switch (under left side of dash)
Park brk sw sig
Park lamps sig
Pnk
Red
Right headlamp
Right high beam headlamp
Right low beam headlamp
Rt hi beam fuse 52 10a
Rt lo beam fuse 54 10a
Serial data
Switch off sig
Switch on sig
Turn signal/ multi-function switch
Underhood fuse block (on left side of engine compt)
W/ chrome grille
W/o chrome grille
X200
X220

HORN

Horn Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Horn Wiring Diagram for Chevrolet Chevy Express G2012 1500:

(w/ automatic electronics cruise control & redundant radio steering wheel controls) j210
A x1
A1 x200
Body control module (bcm) (behind lower right side of dash)
G102 (4.3l: right rear of engine) (4.8l, 5.3l & 6.0l: on left rear of engine) (6.6l: left front lower side of engine block)
G302 (behind left kick panel)
Horn assembly (at left front of engine compt)
Horn fuse 16 20a
Horn relay ctrl
Horn switch (in steering wheel)
Horn/ wash pcb relay k5
Hot at all times
Inflatable restraint steering wheel module coil (at top of steering column)
J102
J264
Tan
Underhood fuse block (on left side of engine compt)
X1 a
X1 b4
X2 a
X2 k

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram (1 of 3) for Chevrolet Chevy Express G2012 1500

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List of elements for Instrument Cluster Wiring Diagram (1 of 3) for Chevrolet Chevy Express G2012 1500:

(if equipped) electronic compass module
Abs ind
Air bag ind
Ajar sw sig
Ambient air temperature sensor (w/ outside temperature display) (behind front grille, on radiator support)
B11
Batt pos volt
Belt ind
Body control module (bcm) (behind lower right side of dash)
Body fuse block (under left front seat)
Brake ind
Charge ind
Cmps fuse 19 10a
Computer data lines system
Cruise ind
Dic sw sig
Driver information center (dic) display
Engine controls system
Engine coolant level switch (diesel) (right front of engine compt, attached to bottom of coolant surge tank)
Engine coolant temperature gauge
Fuel gauge
G302 (behind left kick panel)
Gmlan serial
Gnd
High beam ind
Hot at all times
Hot w/ run relay k1 energized
Hot w/ run/crnk relay 15 energized
Ign volt
Ind ctrl
Ind lamp (mil) malfunction
Instrument panel cluster (ipc)
Ip cluster fuse 23 10a
Ipc fuse 10 10a
J244
Left turn ind
Lf door ajar sw
Liftgate
Logic
Low engine oil pressure gauge
Low fuel ind
Low ref
Low stability ind
Lr door open sw
Mil ctrl
Network 3
Odometer
Park brake switch (under left side of dash)
Pass off ind
Pass on ind
Pass seat belt
Passenger seat
Pnk
Pressure ind low oil
Prnd 321
Rf door ajar sw
Right turn ind
Rr door open sw
Seat belt ind
Security ind
Sens sig
Seo fuse 27 10a
Speedometer
Sw sig
Switch sig
Tire pressure ind
Tow/haul ind
Traction control ind
Underhood fuse block (on left side of engine compt)
Volts gauge
W/ brake warning indicator system
W/ odometer security wiring provision (seo)
W/o odometer security wiring provision (seo)
Wait to start ind (diesel)
X100
X150
X205
X220
X318

Instrument Cluster Wiring Diagram (2 of 3) for Chevrolet Chevy Express G2012 1500

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List of elements for Instrument Cluster Wiring Diagram (2 of 3) for Chevrolet Chevy Express G2012 1500:

(or 6049)
4.3l
4.8l/5.3l/6.0l
5v ref 2
6.6l
C12
Cargo door latch assembly (w/ cargo/passenger) (in right rear cargo door)
Computer data lines system
Data bus(+)
Data bus(-)
Driver door latch assembly
Driver information center (dic) switch
Engine control module (ecm) (left side of engine compt)
G302 (behind left kick panel)
G347
G348
G401 (on top of right "d" pillar)
Hinged door)
Illumi- nation
Interior lights system
J244
J501 (w/ electronic side door lock control))
J601 (w/ electronic side door lock control)
J901 (w/ electronic side door lock control)
Left rear side door jamb switch (w/ left rear
Low ref
Passenger door latch assembly (at rear of front passenger door)
Person- alization
Pnk
Right rear door jamb switch (w/ cargo/passenger)
Sens sig
Set/ reset
Splice pack jx347 (in body harness, attached to lower left "b" pillar)
Splice pack jx348 (in body harness, attached to lower right "b" pillar part of g348)
Switch sig
Tan
Trip/ fuel
Vehicle info
W/ brake warning indicator system
Water in fuel sensor
X101
X107
X174
X316 b
X318
X400
X500
X600

Instrument Cluster Wiring Diagram (3 of 3) for Chevrolet Chevy Express G2012 1500

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List of elements for Instrument Cluster Wiring Diagram (3 of 3) for Chevrolet Chevy Express G2012 1500:

4.3l
4.3l, 4.8l & 6.0l (vin g)
4.8l/5.3l/6.0l
5.3l
5v ref
6.0l (vin b)
6.6l
Alternative fuel tank pressure sensor
B x141
B4 x101
Brake booster fluid flow alarm switch (in power steering pump outlet hose)
Brake booster fluid pressure alarm switch (in power steering pump inlet hose)
Brake pressure differential switch (on brake valve, near front of ebcm)
Cng control module (6.0l(vin b)) (forward of left rear spring on frame)
Cng fuel vehicle
Compt)
Engine controls system
Engine oil level switch (on left side of oil pan)
Engine oil pressure (eop) sensor (except 6.6l: on top rear of engine) (6.6l: lower left side of engine)
Fuel level sensor (on left frame rail)
Fuel pump & sender assembly (on fuel tank)
Fuel pump relay sig
G103 (4.3l: left rear of engine) right rear of engine) (6.6l: left front lower side of the engine block) (4.8l, 5.3l & 6.0l: on right rear of engine)
G110 (lower left front of engine)
G300 (on left frame rail, near ebcm)
G302 (behind left kick panel)
Heavy duty
J101
J244
J301 (cutaway: in chassis harness, 87 cm from ebcm connector breakout) (passenger/cargo: in chassis harness, 44 cm from ebcm connector breakout)
J315
J369
Light duty
Low ref
Lpg control module (6.0l(vin b)) (on tank control box)
Lpg fuel vehicle w/ 3 tank
Lpg fuel vehicle w/ 4 tank
Pressing
Primary fuel level sensor
Primary sig fuel sender
Red
Secondary fuel level sensor
Secondary sig fuel sender
Sensing
Tan
W/ brake warning indicator system
X100
X101
X110
X141
X350

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Courtesy Lamps Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2012 1500:

(in body harness, 15 cm from x306 breakout) j331
(or 690)
(provisional)
(w/ rear a/c & front vanity mirror w/o rv upfitter) j314
All times
Body control module (bcm) (behind lower right side of dash)
Body fuse block (under left front seat)
C12
C7 x3
Cargo
Cargo door latch assembly (in right rear cargo door)
Cargo/passenger
Computer data lines system
Courtesy lp ctrl
Ctsy lp ctrl
Data bus (+)
Data bus (-)
Defeat sw sig
Dome
Fl dome rly ctrl
Front dome/ reading lamps
G102 (except 6.6l & 4.3l: on left rear of engine) (6.6l: left front lower side of the engine block) (4.3l: right rear of engine)
G302 (behind left kick panel)
G348
G401 (on top of right "d" pillar)
G401 (passenger) (on top of right "d" pillar)
G402 (cargo) (on top of left "d" pillar)
Harness, 11 cm from right sunshade breakout) j332
Headlamp & panel dimmer switch
Hot at
J102
J247
J248
J302
J330
J407 (in rear headliner harness, 44 cm from x420)
J901 (w/ electronic side door lock control)
K x405
Left sunshade (on upper left of headliner)
Lf dr ajar sw sig
Liftgate ajar sw sig
Lr dr open sw sig
Middle dome/ reading lamps
Passenger
Passenger/cargo w/o rv upfitter
R x320
Reading
Rear dome/ reading lamps (passenger) dome lamp (cargo)
Red
Rf dr ajar sw sig
Right sunshade (on upper right of headliner)
Rr dr open sw sig
Splice block jx348 (in body harness, attached to lower right "b" pillar part of g348)
Tan
Underhood fuse block (on left side of engine compt)
Underhood lamp
Upftr aux 1 fuse f16 (w/ cutaway, ambulance & rv upfitters) 50a
Upftr ctsy lamp fuse f30 15a
Upftr ctsy lamp pcb relay k8 (w/ ambulance & rv upfitter)
W/ commercial tradesman sales package & cargo lamp
W/ cutaway
W/ cutaway & cargo w/o rv upfitter
W/ left & right sunshade mirror
W/ rv upfitter
W/ rv upfitter, left & right sunshade mirror
W/o rv upfitter
X1 e1
X100
X109
X2 h7
X205
X205 h
X304
X318
X400
X417
X420
X500
X600

Courtesy Lamps Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Courtesy Lamps Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2012 1500:

(at left "b" pillar) (w/ commercial tradesman sales package & cargo lamp) dome fluorescent work lamps relay
(w/ electronic side door lock control) j501
Dome fluorescent work lamps fuse 2 10a
Driver door latch assembly (at rear of driver door)
Front cargo fluorescent work lamp
G347
G348
G403 (on center of left "d" pillar)
J312
J348
J350 (in prp/uf2 harness, 12 cm from left front dome fluorescent work lamp connector)
J601 (w/ electronic side door lock control)
Left front access panel fluorescent work lamp
Left rear access panel fluorescent work lamp
Left rear door jamb switch (w/ left rear hinged door)
Passenger door latch assembly (at rear of front passenger door)
Rear cargo fluorescent work lamp
Rear fuse block (on left "b" pillar)
Red
Right access panel fluorescent work lamp
Right rear door jamb switch (cargo/ passenger)
Splice block jx347 (in body harness, attached to lower left "b" pillar)
Splice block jx348 (in body harness, attached to lower right "b" pillar part of g348)

Instrument Illumination Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Instrument Illumination Wiring Diagram for Chevrolet Chevy Express G2012 1500:

(in instrument panel harness, 70 cm from radio) j207
(in steering column) inflatable restraint steering wheel module coil
(in steering wheel harness, near x200 connector) j208
(not used)
(w/ power mirrors & power windows)
A15
A4 x1
A7 x2
Auto
Auxiliary blower motor switch (if equipped)
Battery pos volt
Bcm 1 fuse 59 10a
Bcm 2 fuse 58 10a
Body control module (bcm) (behind lower right side of dash)
Body fuse block (under left front seat)
C2 x1
Computer data lines system
Data bus (+)
Data bus (-)
Dimming ctrl
Driver door lock switch
Driver information center (dic) switch
Driver window switch
Front auxiliary hvac control assembly
G301 (behind left kick panel)
G302 (behind left kick panel)
G304 (behind right kick panel)
G347
G348
H2 x3
Headlamp & panel dimmer switch
Headlamps off sig
Heavy duty
Hot at all times
Hvac control assembly
Inflatable restraint i/p module disable switch (w/ manual suppression)
Ip dimming volt ref
Ipl dimmer sw sig
Ipl dimming ctrl
J210
J244
J248
J249
J250 (in dash harness, 5 cm from air temperature actuator connector breakout)
J265
J314
J355 (w/ rear auxiliary controls & rv upfitter: in upfitter hvac control harness, 11 cm from auxiliary hvac control processor connector breakout) (w/o rv upfitter: in front headliner harness, 21 cm from x304 breakout)
J356 (in body harness, 20 cm from underhood fuse block breakout)
J5 x2
J600
Left steering wheel control switch
Off
Park head
Park lamps sig
Passenger door lock switch
Passenger window switch
Pnk
Radio
Rear auxiliary hvac control assembly
Right steering wheel control switch
Splice block jx347 (in body harness, attached to lower left "b" pillar)
Splice block jx348 (in body harness, attached to lower right "b" pillar part of g348)
Str/whl/ snsr fuse f2 2a
Tan
Tow/haul switch
Traction control switch (tcs) (w/ active brake control)
Underhood fuse block (on left side of engine compt)
W/ automatic electronic cruise control
W/ automatic electronic cruise control & redundant radio steering wheel control
W/ auxiliary heater & w/o rear a/c
W/ electric side door lock
W/ power operated window
W/ rear auxiliary controls
W/ redundant radio steering wheel control
W/ rv upfitter
W/o radio provisions
W/o rear auxiliary controls
W/o redundant radio steering wheel control
W/o rv upfitter
X1 a6
X200
X205
X319
X420
X500
X600

NAVIGATION

Navigation Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Navigation Wiring Diagram for Chevrolet Chevy Express G2012 1500:

(behind left kick panel) g302
(in body harness, 10 cm from x415 breakout) j451
(in body harness, 10 cm from x419 breakout) j450
(not used)
(or pnk)
(or pnk) e
(w/ vehicle communication system) j271 (w/o vehicle communication system) j248
12v ref
A11
Antenna in
B12
Batt positive volt
Body control module (bcm) (behind lower right side of dash)
Body fuse block (under left front seat)
C12
Cellular & digital radio antenna
Cellular & navigation antenna
Coax
Computer data lines system
Cruise control system
Cutaway, upfitter
Digital radio receiver (left side of dash)
Drain wire
Gnd
Hi spd gmlan serial data bus (+)
Hi spd gmlan serial data bus(-)
Hot at all times
Inflatable restraint steering wheel module coil (at top of steering column)
Info
Interior lights system
J270
J452 (in body harness, 46 cm from x417 breakout)
J453 (in body harness, 52 cm from x417 breakout)
Led dimming ctrl
Left cargo door speaker (if equipped)
Left front speaker
Left rear speaker
Lf mid out (+)
Lf mid out (-)
Lh audio sig (+)
Lh audio sig (-)
Lo gmlan serial data
Lo ref
Lo serial data
Lo spd gmlan serial data
Lr mid out (+)
Lr mid out (-)
Mute
Nca
Passenger/ cargo
Pnk
Radio
Radio antenna
Rdo/ chime fuse 20 15a
Rf mid out (+)
Rf mid out (-)
Rh audio sig (+)
Rh audio sig (-)
Right cargo door speaker (if equipped)
Right front speaker
Right rear speaker
Right steering wheel control switch
Rr mid out (+)
Rr mid out (-)
Seek down
Seek up
Source
Steering wheel ctrl
Tan
Usb cable
Usb charge
Usb receptacle
Vehicle communication interface module (vicm) (below steering column)
Voice sig
Vol down
Vol up
W/ ambulance/ rv upfitters
X1 g4
X200
X318
X320
X400
X411
X415
X500
X600

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 5) for Chevrolet Chevy Express G2012 1500

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List of elements for Power Distribution Wiring Diagram (1 of 5) for Chevrolet Chevy Express G2012 1500:

(on left side of engine compt) underhood fuse block
30a
4.3l/ 5.3l
4.8l & 6.0l
50a
6.6l
Abs mdl fuse 2 40a
Abs mtr fuse 1 50a
Automatic transmission
Aux pwr outlet fuse 25 20a
Auxiliary battery
Auxiliary generator
Battery
Bcm 1 fuse 59 10a
Bcm 2 fuse 58 15a
Bcm 3 fuse 26 10a
Bcm 4 fuse 9 10a
Bcm 5 fuse 7 10a
Bcm 6 fuse 72 10a
Bcm 7 fuse 8 10a
Blower motor resistor
Body control module (bcm)
Body fuse block (under left front seat)
Center console 1 accessory power outlet
Center console 2 accessory power outlet
Cigar lighter
Cnstr vent sol fuse 56 10a
Control solenoid valve assembly
Coolant heater (w/ auxiliary heater)
Cutaway, ambulance &
Data link connector (dlc)
Ecm batt fuse 19 10a
Electrical provisions
Electronic brake control module (ebcm)
Engine control module (ecm)
Evaporative emission (evap) canister vent solenoid valve
Except 6.6l
F21
Fcsm batt fuse 36 20a
Foh mdl fuse 35 15a
From cmps fuse 19 (diagram 4 of 5)
From run relay k1 (diagram 4 of 5)
Frt blwr fuse 74 40a
Fuel pump flow control module (5.3l)
Fuse 28
Fusible link 1
Fusible link 2
Fusible link 3
Fusible link 4
Fusible link 5 (w/ dual generator 145a)
G302 (behind left kick panel)
G304 (behind right kick panel)
Generator
Glow plug control module (gpcm)
Instrument panel cluster (ipc) (w/ odometer security wiring provision (seo))
Intake air heater (iah)
J247
J249
Ltr/dlc fuse 73 20a
Reading lamps
Red
Rv upfitters
Seo fuse 27 10a
Starter motor
Tcm batt fuse 32 10a
To high beam pcb relay k7 (diagram 2 of 5)
Trailer connector
Transmission control module (tcm)
Trlr wrg fuse 11 30a
Trlr wrg fuse 42 30a
Underhood junction block
Upfitter aux 2
Upftr aux 2 relay k4 (cutaway, ambulance & rv upfitters w/ multiple interior reading lamps electrical provisions)
W/ 4 speed a/t
W/ 6 speed a/t
W/ active brake control
W/ cigar lighter
W/ cutaway upfitter
W/ multiple interior reading lamps
W/ rv upfitter
W/ truck trailer
W/o active brake control
W/o cigar lighter
X101
X174
X222
X321

Power Distribution Wiring Diagram (2 of 5) for Chevrolet Chevy Express G2012 1500

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List of elements for Power Distribution Wiring Diagram (2 of 5) for Chevrolet Chevy Express G2012 1500:

(diagram 3 of 5)
(in engine harness, 5 cm from x101 breakout) j120
(in odd ignition/coil module jumper harness, on top left pnk side of engine) j184
(on left side of engine compt) underhood fuse block
(or red) pnk
3 tank vehicle kit
4 tank vehicle kit
4.3l
4.8l, 5.3l & 6.0l
6.6l
A/c cmprsr relay 40 (manual a/c)
Central sequential fuel injection (central sfi) (4.3l)
Crnk relay 39
Drl pcb relay k19
Ecm pwr/trn fuse 45 30a
Ecm pwr/trn fuse 78 10a
Engine control module (ecm)
Engine cooling fan (6.6l)
Evaporative emission (evap) canister purge solenoid valve
Even ign/ inj fuse 79 20a
Except 6.6l
Fan cltch (ev) fuse 63 (6.6l) 10a
Fan cltch (ev) relay 50 (6.6l)
From trlr wrg fuse 42 a (diagram 1 of 5)
From v6 fuel inj fuse 75 (diagram 2 of 5)
Fuel heater (6.6l)
Fuel htr fuse 71 15a
Fuel injector
Fuel pump relay 38
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
Hi beam pcb relay k7
Horn/wash pcb relay k5
Ignition coil 1
Ignition coil 2
Ignition coil 3
Ignition coil 4
Ignition coil 5
Ignition coil 6
Ignition coil 7
Ignition coil 8
Ignition control module (icm)
J150
J151
J185 (in even ignition/ coil module jumper harness, on top right side of eng)
Lo beam pcb relay k6
Lpg fuel vehicle &
Maf/cnstr vent fuse 64 15a
Mass air flow (maf)/ intake air temperature (iat) sensor
Mega fuse 125a
Nca
O2 snsr 1 (pre)/cls fuse 77 10a
O2 snsr 2 (post) fuse 62 10a
Odd ign/ inj fuse 65 (except 6.6l) 20a
Pnk
Pnk (or red)
Pnk a
Pnk b
Pnk f
Pwr/trn relay 49
Red
Reductant sensor module
Stop lamps pcb relay k11 (cutaway)
To body fuse block (diagram 4 of 5)
To even ign/inj fuse 79 (diagram 2 of 5)
To fuse holder (diagram 5 of 5)
To run/crnk relay 15 d
Trlr lt stop/trn pcb relay k9 (w/ truck trailer)
Trlr rt stop/trn pcb relay k18 (w/ truck trailer)
V6 fuel inj fuse 75 15a
W/ cutaway
Wpr fuse 55 25a
Wpr hi pcb relay k3
Wpr pcb relay k13
X101
X126
X127
X142
X161
X162
X163
X164
X165
X166
X167
X168
X174
X218
X316
X395

Power Distribution Wiring Diagram (3 of 5) for Chevrolet Chevy Express G2012 1500

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List of elements for Power Distribution Wiring Diagram (3 of 5) for Chevrolet Chevy Express G2012 1500:

(in prp/uf2 harness, 7 cm from breakout for rear fuse block) j312
Acc
Air bag fuse 28 10a
Body control module (bcm)
Brk sw fuse 13 10a
Dome fluorescent work lamps fuse 2 10a
Fluorescent work lamp relay
From body fuse block (diagram 4 of 5)
From mega fuse (diagram 2 of 5)
Fscm ign fuse 6 10a
Fuel pump flow control module (5.3l)
G102 (4.3l: right rear of engine) (4.8l/5.3l/6.0l: on left rear of engine) (6.6l: left front lower side of engine block)
Ign
Ignition switch
Inflatable restraint i/p module disable switch
Inflatable restraint i/p module indicator
Inflatable restraint sensing & diagnostic module (sdm)
Instrument panel cluster (ipc)
Ipc fuse 10 10a
J102
J203 (in steering column harness, 27 cm from x200 connector)
J205 (in steering column harness, 30 cm from x200 connector)
J302 (in prp/uf2 harness, 15 cm from rear fuse block)
J303 (in prp/uf2 harness, 8 cm from rear fuse block)
Key-in switch
Left front access panel relay 5
Left rear access panel relay 1
Off
Panel actuator fuse 3 45a
Pnk
Rear fuse block (on left "b" pillar)
Red
Right access panel relay 6
Run
Run/crnk relay 15
Start
Steering wheel speed/ position sensor
Stop lamp switch
Str/whl snsr fuse 29 (w/ active brake control) 10a
Theft deterrent module (tdm)
To splice j115 (diagram 5 of 5)
To trans fuse 17 (diagram 5 of 5)
Underhood fuse block (on left side of engine compt)
W/ cargo lamp
W/ manual suppression
W/o rv upfitter & manual suppression
X100
X200
X221
X318

Power Distribution Wiring Diagram (4 of 5) for Chevrolet Chevy Express G2012 1500

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List of elements for Power Distribution Wiring Diagram (4 of 5) for Chevrolet Chevy Express G2012 1500:

(not used)
(under left front seat) body fuse block
6.6l
Air bag/aos fuse 10 10a
Air temperature actuator
Auxiliary air temperature actuator (w/ rear a/c)
Auxiliary blower motor high speed relay
Auxiliary blower motor low speed relay
Auxiliary blower motor medium speed relay
Auxiliary hvac control module
Auxiliary mode actuator (w/ rear a/c)
Bck/up lamp pcb relay k7
Body control module (bcm)
Cargo dr unlck pcb relay k10b
Cmps fuse 19 10a
Digital radio receiver
Driver seat adjuster switch (w/ driver power seat adjuster)
Driver window switch (if equipped)
Drvr dr unlck pcb relay k9b
Electronic compass module (if equipped)
Empty fuse
From underhood fuse block (diagram 2 of 5)
Front auxiliary hvac control assembly
Ftr rear dr lck pcb relay k10a
Ftr rear pass dr unlck pcb relay k9a
G302 (behind left kick panel)
Hvac 1 fuse 14 20a
Hvac 2 fuse 13 10a
Hvac cntrl fuse 25 10a
Hvac control assembly
Hvac control assembly (w/ electric rear window defogger & power mirrors)
Hvac control assembly (w/ rear window defogger, power mirrors & manual a/c)
I/p cluster fuse 23 10a
Ign sw (dlis)/pk3 fuse 22 2a
Inflatable restraint front passenger system (pps) presence sensor (light duty w/o rv upfitter)
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint vehicle rollover sensor (w/ left & right roof side)
Instrument panel cluster (ipc) (w/o odometer security wiring provision (seo))
J247
J270
J307 (in upfitter hvac control harness, 88 cm from x303 breakout)
J405
J412 (in rear hvac harness, 20 cm from auxiliary blower motor connector breakout)
Manual a/c w/ power mirrors & rear window defogger
Onstar fuse 11 10a
Osrvm sw fuse 9 5a
Outside rearview mirror switch (if equipped)
Passenger seat adjuster switch (w/ passenger power seat adjuster)
Passenger window switch (if equipped)
Prk lamps relay k3
Pwr seats circuit breaker 1 30a
Pwr windows circuit breaker 2 25a
Radio
Rap relay k6
Rdo/chime fuse 20 15a
Rear auxiliary hvac control assembly
Rear blwr fuse 29 30a
Rear defog relay k5 (w/ power mirror & rear window defogger)
Remote control door lock receiver (rcdlr) (w/ low tire pressure & remote keyless entry)
Rfa/tpm fuse 21 10a
Run relay k1
To splice j203 (diagram 3 of 5)
To splice j302 (diagram 3 of 5)
To upftr aux 2 relay k4 (diagram 1 of 5)
Upfitter aux 1 fuse 16 (w/ cutaway, ambulance & rv upfitters) 50a
Upftr ctsy lamps pcb relay k8 (w/ ambulance & rv upfitters)
Vacuum pump (6.6l)
Vehicle communication interface module (vcim) (if equipped)
W/ chime module
W/ commercial tradesman
W/ cutaway
W/ digital audio
W/ electric side door lock control
W/ rear a/c
W/ rear a/c & auxiliary heater
W/ rear a/c, auxiliary heater, plumbing & wiring provision
W/ rv upfitter
W/ rv upfitter & swb passenger
W/o chime module
W/o digital audio
W/o rv upfitter
X100
X200
X205
X222
X306
X307
X321
X407
X409
X420
X500
X600

Power Distribution Wiring Diagram (5 of 5) for Chevrolet Chevy Express G2012 1500

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List of elements for Power Distribution Wiring Diagram (5 of 5) for Chevrolet Chevy Express G2012 1500:

(diagram 2 of 5)
(in engine harness, 15 cm from x101 breakout) j115
(in lpg chassis harness, 13 cm from lpg control module) j361
(in lpg chassis harness, 13 cm from primary fuel pump relay) j364
(in lpg chassis harness, 7.5 cm from primary fuel pump relay) j363
(in lpg chassis harness, 7.5 cm from scavenge fuel pump relay) j366
(in lpg chassis harness, 7.5 cm from scavenge red
(in lpg chassis harness, 7.5 cm from secondary fuel pump relay) j367
(in lpg main harness,
(in lpg main harness, first splice from battery positive ring terminal circuit) j167
(in lpg main harness, near wait to start lamp relay) j168
(or red)
1-2 shift solenoid (ss) valve
2-3 shift solenoid (ss) valve
3 tank complete vehicle kit
4 tank complete vehicle kit
4.3l
4.8l, 5.3l & 6.0l
6.6l
At breakout of battery positive voltage to lpg bypass solenoid relay) j172
Automatic transmission
Automatic transmission input shaft speed (iss) sensor
Control solenoid valve assembly
Ecm ign/ glow plug mdl ign fuse 30 15a
Engine control module (ecm)
Evaporative emission purge solenoid valve relay
Evaporative emission vent solenoid valve relay
Except 6.6l
From body control h module (bcm) (diagram 3 of 5)
From fscm j ign fuse 6 (diagram 3 of 5)
From underhood fuse block l
Fuel pump relay) j365
Fuse holder
Glow plug control module (gpcm)
J135
J169
J170 (in lpg main harness, at breakout of battery positive voltage to lpg bypass solenoid relay & vacuum pump)
J171 (in lpg main harness, at breakout of battery positive voltage to lpg control module & resistor)
J173
J174
Lpcm fuse 20a
Lpcm fuse 30a
Lpg control module
Lpg tank scavange pump
M pnk
Petroleum & gas
Pnk
Primary fuel pump
Red
Secondary fuel pump
Tcm ign fuse 31 15a
Torque converter clutch (tcc) pulse width modulation (pwm) solenoid valve
Torque converter clutch (tcc) solenoid valve
Trans fuse 17 15a
Transmission control module (tcm)
Underhood fuse block (on left side of engine compt)
Vacuum pump
W/ 4 speed
W/ 4 speed a/t
W/ 6 speed a/t
Wait to start indicator relay
X101
X107
X174

POWER DOOR LOCKS

Power Door Locks Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Power Door Locks Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2012 1500:

Battery b+
Body control module (bcm) (behind lower right side of dash)
Body fuse block (under left front seat)
Cargo dr unlck fuse 33 15a
Cargo dr unlck pcb relay k10b
Chime module (behind left center of dash)
Computer data lines system
Driv door lock rly
Driv door lock sig
Driv door unlock sig
Drv dr unlck fuse 36 15a
Drvr dr unlck pcb relay k9b
Frt dr lck fuse 31 15a
Frt pass dr unlck fuse 34 15a
Frt rear pass dr unlck pcb relay k9a
Ftr rear dr lck pcb relay k10a
G302 (behind left kick panel)
G347
G348
Ground
Hot at all times
J247
J248
Left rear side door jam switch (w/ hinged door) (at left "b" pillar)
Lf door ajar sw
Lf door open sw
Liftgate ajar sw sig
Lo spd
Lo spd gmlan serial data x3
Lr door open sw
Pass door lock sw
Radio
Rear dr lck fuse 32 15a
Rear open sw
Rear pass dr unlck fuse 35 15a
Remote control door lock receiver (rcdlr) (behind center of dash)
Rf door ajar sw
Rf door open sw
Rfa/tpm fuse 21 10a
Right rear side door jam switch (w/ cargo passenger) (at right "b" pillar)
Rr door open sw
Serial data
Splice block jx347 (in body harness, attached to lower left "b" pillar)
Splice block jx348 (in body harness, attached to lower right "b" pillar part of g348)
Tan
W/ commercial tradesman
W/ hinged door
W/o commercial tradesman
X318

Power Door Locks Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Power Door Locks Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2012 1500:

(in body harness, 40 cm from x306 breakout)
(in body harness, near front passenger seat, 20 cm from x306)
A11
B11
C10
C11
C12
Cargo door latch assembly (w/ cargo/passenger) (in right rear cargo door)
Cargo door lock switch
Cargo/ passenger
Class 2
Computer data lines system
Cutaway
Driver door latch assembly (at rear of driver door)
Driver door lock switch
Driver information center (dic)
G347
G348
G401 (on top of right "d" pillar)
Instrument panel cluster (ipc)
J322
J323
J501 (w/ electronic side door lock control)
J601 (w/ electronic side door lock control)
J901 (w/ electronic side door lock control)
Left rear side door lock actuator (w/ left rear hinged side door) (rear of left door)
Left side door contact plate (at left "b" pillar)
Logic
Passenger door latch assembly (at rear of front passenger door)
Passenger door lock switch
Right rear side door lock actuator (w/ rear hinged side door & rear sliding side door) (hinged: at left side of right door)
Right side door contact plate (at right "b" pillar)
Security indicator
Splice block jx347 (in body harness, attached to lower left "b" pillar)
Splice block jx348 (in body harness, attached to lower right "b" pillar part of g348)
Tan
W/ hinged door
W/ hinged doors
W/ sliding doors
X318
X400
X500
X600

POWER MIRRORS

Power Mirrors Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Power Mirrors Wiring Diagram for Chevrolet Chevy Express G2012 1500:

Body fuse block (under left front seat)
Connector)
Defogger system
Driver
Driver outside rearview mirror (in driver door)
Exterior lights system
G347
Hot at all times
J500
Jx347 (in body harness, attached to lower left "b" pillar)
Nca
Osrvm sw fuse 9 5a
Outside rearview mirror switch
Passenger
Passenger outside rearview mirror (in right front passenger door)
R/l
Up/dn
X500
X500 d7
X600

POWER SEATS

Power Seats Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Power Seats Wiring Diagram for Chevrolet Chevy Express G2012 1500:

All- down
All-up
Back
Body fuse block (under left front seat)
Down
Driver seat adjuster motor assembly
Driver seat adjuster switch
Entire seat
For- ward
Front down
Front up
Front vertical
G347
G348
Horizontal
Hot at all times
Jx347 (in body harness, attached to lower left "b" pillar)
Jx348 (in body harness, attached to lower right "b" pillar part of g348)
Nca
Passenger seat adjuster motor assembly
Passenger seat adjuster switch
Pwr seats circuit breaker 1 30a
Rear down
Rear up
Rear vertical
Tan
X306
X306 h
X307
X307 d

POWER WINDOWS

Power Windows Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Power Windows Wiring Diagram for Chevrolet Chevy Express G2012 1500:

B4 tan
Body control module (behind lower right side of dash)
Body fuse block (under left front seat)
Driver window motor (in driver door)
Driver window switch
G302 (behind left kick panel)
G347
G348
Hot at all times
Ign volt
Interior lights system
J247
J500
J600
Left
Passenger window motor (in front passenger door)
Passenger window switch
Pwr wdo circuit breaker 2 25a
Rap relay k6
Right
Splice block jx347 (attached to lower left "b" pillar)
Splice block jx348 (attached to lower right "b" pillar part of g348)
Tan
Tan d4
X500
X600

RADIO

Radio Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Radio Wiring Diagram for Chevrolet Chevy Express G2012 1500:

(behind left kick panel) g302
(in body harness, 10 cm from x415 breakout) j451
(in body harness, 10 cm from x419 breakout) j450
(not used)
(or pnk)
(or pnk) e
(w/ vehicle communication system) j271 (w/o vehicle communication system) j248
12v ref
A11
Antenna in
B12
Batt positive volt
Body control module (bcm) (behind lower right side of dash)
Body fuse block (under left front seat)
C12
Cellular & digital radio antenna
Cellular & navigation antenna
Coax
Computer data lines system
Cruise control system
Cutaway, upfitter
Digital radio receiver (left side of dash)
Drain wire
Gnd
Hi spd gmlan serial data bus (+)
Hi spd gmlan serial data bus(-)
Hot at all times
Inflatable restraint steering wheel module coil (at top of steering column)
Info
Interior lights system
J270
J452 (in body harness, 46 cm from x417 breakout)
J453 (in body harness, 52 cm from x417 breakout)
Led dimming ctrl
Left cargo door speaker (if equipped)
Left front speaker
Left rear speaker
Lf mid out (+)
Lf mid out (-)
Lh audio sig (+)
Lh audio sig (-)
Lo gmlan serial data
Lo ref
Lo serial data
Lo spd gmlan serial data
Lr mid out (+)
Lr mid out (-)
Mute
Nca
Passenger/ cargo
Pnk
Radio
Radio antenna
Rdo/ chime fuse 20 15a
Rf mid out (+)
Rf mid out (-)
Rh audio sig (+)
Rh audio sig (-)
Right cargo door speaker (if equipped)
Right front speaker
Right rear speaker
Right steering wheel control switch
Rr mid out (+)
Rr mid out (-)
Seek down
Seek up
Source
Steering wheel ctrl
Tan
Usb cable
Usb charge
Usb receptacle
Vehicle communication interface module (vicm) (below steering column)
Voice sig
Vol down
Vol up
W/ ambulance/ rv upfitters
X1 g4
X200
X318
X320
X400
X411
X415
X500
X600

SHIFT INTERLOCK

Shift Interlock Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Shift Interlock Wiring Diagram for Chevrolet Chevy Express G2012 1500:

(+)
(-)
(4.3l: left rear of engine) (5.3l: on right rear of engine) g103
6.6l
6.6l 4.8l, 5.3l & 6.0l 4.3l
A/t shift lock control solenoid (on right side of steering column, under support bracket)
Automatic transmission (4.3l & 5.3l)
Automatic transmission (except 4.3l & 5.3l)
Automatic transmission internal mode switch (ims)
Bcm-2 fuse 58 10a
Body control module (bcm) (behind lower right side of dash)
Brake pedal position sensor (top of brake pedal assembly)
Brake pos low ref
Brake pos sen sig
Brk b+
Computer data lines system
Control solenoid valve assembly
Engine control module (ecm) (left side of engine compt)
Fuel tem sig
G302 (behind left kick panel)
Gm lan hi spd
Hi spd ser data (+)
Hi spd ser data (-)
Hi spd ser data +
Hi spd ser data -
Hot at all times
J101
J264
Low ref
Park/neutral position (pnp) switch
Sol ctrl
Sw sig p
Tan
Transmission control module (tcm)
Transmission control module (tcm) (6.6l:left front corner of engine compt)
Underhood fuse block (on left side of engine compt)
X103
X107
X200 d4
X3 k3

STARTING/CHARGING

4.3L VIN X

4.3L VIN X, Charging Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for 4.3L VIN X, Charging Wiring Diagram for Chevrolet Chevy Express G2012 1500:

(on right front of engine compt) g106
4.3l
4.3l/5.3l
4.8l/6.0l
5v ref
A1 x3
Battery
Battery current sensor (4.3l/5.3l)
Body control module (bcm) (behind lower right side of dash)
Charge ind
Computer data lines system
Current sensor sig
Data bus (+) x1
Data bus (-)
Driver information center (dic) display
Engine control module (ecm) (left side of engine compt)
Except 4.3l
Fusible link 3
G104 (on lower right front of engine)
G105 (on right front frame rail, in engine compt)
Generator
Generator field duty cycle sig
Generator turn on sig x2
Gmlan serial data
Hot w/ run/crank relay 15 energized
Ign volt
Instrument panel cluster (ipc)
Ipc fuse 10 10a
Logic
Low ref
Low speed gmlan serial data
Pnk
Power distribution system
Red
Sens sig
Starting circuit
Tan
Underhood fuse block (on left side of engine compt)
X100

4.3L VIN X, Starting Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for 4.3L VIN X, Starting Wiring Diagram for Chevrolet Chevy Express G2012 1500:

4.3l
4.3l & 5.3l
4.8l & 6.0l
Automatic transmission
Automatic transmission internal mode switch (ims)
Battery
Body control module (bcm) (behind lower right side of dash)
Charging circuit
Computer data lines system
Control solenoid valve assembly
Crnk relay 39
Data bus (+)
Data bus (-)
Engine control module (ecm) (left side of engine compt)
Except 4.3l
Fusible link 2
G102 (except 4.3l: on left rear of engine) (4.3l: right rear of engine)
G103 (except 4.3l: on right rear of engine) (4.3l: left rear of engine)
G104
G105 (on right front frame rail, in engine compt)
G106 (on right front of engine compt)
Gmlan serial data
Ignition switch
Ignition voltage
J101
J102
Nca
Off
Park/ neutral/ signal
Park/neutral position (pnp) switch
Pnk
Red
Run acc
Start
Starter enable relay ctrl
Starter motor
Strtr sol fuse 64 40a
Tan
Transmission control module (tcm)
Underhood fuse block (on left side of engine compt)
X175
X200 c1

5.3L VIN 4

5.3L VIN 4, Charging Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for 5.3L VIN 4, Charging Wiring Diagram for Chevrolet Chevy Express G2012 1500:

(on right front of engine compt) g106
4.3l
4.3l/5.3l
4.8l/6.0l
5v ref
A1 x3
Battery
Battery current sensor (4.3l/5.3l)
Body control module (bcm) (behind lower right side of dash)
Charge ind
Computer data lines system
Current sensor sig
Data bus (+) x1
Data bus (-)
Driver information center (dic) display
Engine control module (ecm) (left side of engine compt)
Except 4.3l
Fusible link 3
G104 (on lower right front of engine)
G105 (on right front frame rail, in engine compt)
Generator
Generator field duty cycle sig
Generator turn on sig x2
Gmlan serial data
Hot w/ run/crank relay 15 energized
Ign volt
Instrument panel cluster (ipc)
Ipc fuse 10 10a
Logic
Low ref
Low speed gmlan serial data
Pnk
Power distribution system
Red
Sens sig
Starting circuit
Tan
Underhood fuse block (on left side of engine compt)
X100

5.3L VIN 4, Starting Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for 5.3L VIN 4, Starting Wiring Diagram for Chevrolet Chevy Express G2012 1500:

4.3l
4.3l & 5.3l
4.8l & 6.0l
Automatic transmission
Automatic transmission internal mode switch (ims)
Battery
Body control module (bcm) (behind lower right side of dash)
Charging circuit
Computer data lines system
Control solenoid valve assembly
Crnk relay 39
Data bus (+)
Data bus (-)
Engine control module (ecm) (left side of engine compt)
Except 4.3l
Fusible link 2
G102 (except 4.3l: on left rear of engine) (4.3l: right rear of engine)
G103 (except 4.3l: on right rear of engine) (4.3l: left rear of engine)
G104
G105 (on right front frame rail, in engine compt)
G106 (on right front of engine compt)
Gmlan serial data
Ignition switch
Ignition voltage
J101
J102
Nca
Off
Park/ neutral/ signal
Park/neutral position (pnp) switch
Pnk
Red
Run acc
Start
Starter enable relay ctrl
Starter motor
Strtr sol fuse 64 40a
Tan
Transmission control module (tcm)
Underhood fuse block (on left side of engine compt)
X175
X200 c1

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2012 1500:

(behind left kick panel) g301
(in body harness, 11 cm from pnk
(in body harness, pnk 28 cm from seat belt buckle driver x2 connector breakout) j320
(on passenger's seat harness, near breakout for seat adjuster switch) (light duty w/o manual suppression switch & rv/upfitter) inflatable restraint front passenger presence system (pps) sensor
(w/ manual suppression switch) inflatable restraint i/p module disable switch
A x306
Air bag fuse 28 10a
Air bag off ind
Air bag on ind
Air bag/ aos fuse 10 10a
B pnk
B2 x318
Batt
Body fuse block (under left front seat)
Computer data lines system
Driver inflatable restraint seat position sensor (sps) (light duty) (in left front seat)
Driver seat belt switch driver seat belt buckle
Frt prk lamps fuse 4 10a
G301 (behind left kick panel)
Ground
Heavy duty
Hi ctrl
Hot at all times
Hot w/ prk lamps relay k3 energized
Hot w/ run/ crnk relay 15 energized
Ign
Inflatable restraint sensing & diagnostic module (sdm) (under left front seat)
Inflatable restraint steering wheel module (in steering wheel)
Inflatable restraint steering wheel module (light duty) (in steering wheel)
Inflatable restraint steering wheel module coil (at top of steering column)
Interior lights system
Ipc fuse 10 10a
J265
J313
J321 (below passenger seat)
L hi ctrl
L lo ctrl
L seat belt sw
L seat position sens
Lf sensing mod sig
Light duty
Lo ctrl
Lo spd gmlan seria
Logic
Low reference
Low spd
Lr sensing mod sig
Nca
Passenger inflatable restraint seat position sensor (sps) (light duty) (in right front seat)
Passenger seat belt buckle (w/o manual suppression switch & rv/upfitter)
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, 22-23, 24-25 & 26-27)
Pnk
Pnk a
R hi ctrl
R lo ctrl
R seat belt sw
R seat position sens
Red
Rf sensing mod sig
Rollover hi sig
Rr hi ctrl
Rr lo ctrl
Rr sensing mod sig
Sens sig
Shorting bar
Stage 1
Stage 2
Suppression ind ctrl
Sw sig
Tan
Underhood fuse block (on left side of engine compt)
W/ manual suppression switch
W/o manual suppression switch & rv/upfitter
X306
X306 e
X307
X307)
X318
X330

Supplemental Restraints Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2012 1500:

(behind left kick panel) g301
(w/ head curtain air bag) (front center floor board, between front seats)
(w/o manual suppression switch & rv/upfitter) inflatable restraint i/p module indicator
A10
Air bag ind
Air bag off ind
Air bag on ind
B10
Batt
Computer
Computer data lines system
Data lines
Driver seat belt pretensioner (light duty) (on right side of left front seat)
G302 (behind left kick panel)
Gnd
Heavy duty
Hi sig
Ign
Inflatable restraint front end sensor (on lower center of radiator support)
Inflatable restraint i/p module (behind right side of dash)
Inflatable restraint i/p module (light duty) (behind right side of dash)
Inflatable restraint vehicle rollover sensor
Instrument panel cluster (ipc)
J244
J248
J265
Left front inflatable restraint roof rail module (left side of headliner)
Left front inflatable restraint side impact sensor (sis) (in left front side door)
Left rear inflatable restraint side impact sensor (sis) (left center of vehicle behind body panel trim)
Light duty
Lo spd
Logic
Nca
Passenger
Passenger seat belt pretensioner (light duty) (on right side of right front seat)
Pnk
Right front inflatable restraint roof rail module
Right front inflatable restraint side impact sensor (sis) (in right front side door)
Right rear inflatable restraint roof rail module
Right rear inflatable restraint side impact sensor (sis) (in lower right side of vehicle, near rear side door)
Seat belt ind
Shorting bar
Stage 1
System
W/ rear hinged door
W/ rear sliding door
X104
X324
X331
X500
X501
X600
X601

TRANSMISSION

Transmission Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Transmission Wiring Diagram (1 of 2) for Chevrolet Chevy Express G2012 1500:

1-2 shift sol
2-3 shift sol
Acc wakeup data
Automatic transmission (a/t) output shaft speed (oss) sensor
Batt pos volt
Brk sw fuse 13 10a
Brk sw sig
Computer data lines system
G103 (4.3l: left rear of engine) (5.3l: on right rear of engine)
Gnd
Hi spd gmlan data (+)
Hi spd gmlan data (-)
Hot at all times
Hot w/ run/crnk relay 15 energized
Ign volt
Iss sig
J101
J123 (in engine harness, 16 cm from underhood fuse block x1 breakout)
Low ref
Pc sol hi
Pc sol low
Pnk
Replicated tos sig
Stop lamp switch (behind left side of dash, above brake pedal)
Tan
Tcc pwm
Tcc sol valve ctrl
Tcm batt fuse 32 10a
Tcm ign fuse 31 15a
Tft sens sig
Tr sw a sig
Tr sw b sig
Tr sw c sig
Tr sw p sig
Trans fuse 17 15a
Transmission control module (tcm)
Underhood fuse block (on left side of engine compt)
Vss hi sig
Vss low sig
X221

Transmission Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2012 1500

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List of elements for Transmission Wiring Diagram (2 of 2) for Chevrolet Chevy Express G2012 1500:

1-2 shift solenoid (ss) valve
2-3 shift solenoid (ss) valve
4.3l
5.3l
Automatic transmission
Automatic transmission fluid temperature (tft) sensor
Automatic transmission input shaft speed (iss) sensor
Body control module (bcm) (behind lower right side of dash)
Computer data lines system
Engine control module (ecm) (left side of engine compt)
G103 (4.3l: left rear of engine) (5.3l: on right rear of engine)
G302 (behind left kick panel)
Hi spd gmlan +
Hi spd gmlan -
Ind mil
Instrument panel cluster (ipc)
J135
J248
Lo gm gmlan
Logic
Mil ctrl
Nca
Park/neutral position (pnp) switch
Park/neutral signal
Pnk
Pressure control (pc) solenoid valve
Prnd321
Red
Replicated tos sig
Tan
Torque converter clutch (tcc) pulse width modulation (pwm) solenoid valve
Torque converter clutch (tcc) solenoid valve
Tow/ haul ind
Tow/haul sw sig
Tow/haul switch

TRUNK, TAILGATE, FUEL DOOR

Access Panel Release Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Access Panel Release Wiring Diagram for Chevrolet Chevy Express G2012 1500:

Access panel left side front relay control
Access panel left side rear relay control
Access panel right side rear relay control
Body control module (behind lower right side of dash)
G403 (on center of left "d" pillar)
Hot at all times
J300
J303
J309 (in prp/uf2 harness, between left side front access panel actuators)
J408 (in prp/uf2 harness, between left side rear access panel actuators)
J409 (in prp/uf2 harness, 88 cm from right dome fluorescent work lamp connector breakout)
Left front access panel relay 5
Left front side front access panel actuator (behind left front access panel)
Left front side rear access panel actuator (behind left front access panel)
Left rear access panel relay 1
Left rear side front access panel actuator (behind left rear access panel)
Left rear side rear access panel actuator (behind left rear access panel)
Panel actuator fuse 3 15a
Pnk
Rear fuse block (on left "b" pillar)
Right access panel relay 6
Right side front access panel actuator (behind right front access panel)
Right side rear access panel actuator (behind right rear access panel)
Tan

WARNING SYSTEMS

Warning Systems Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Warning Systems Wiring Diagram for Chevrolet Chevy Express G2012 1500:

(behind left kick panel) g302
Acc
Air bag fuse 28 10a
Alarm enable sig
Auto
B10
Battery
Body control module (bcm) (behind lower right side of dash)
Body fuse block (under left front seat)
Brake booster fluid flow alarm switch (w/ brake warning indicator) (in power steering pump outlet hose)
Brake booster fluid pressure alarm switch (w/ brake warning indicator) (in power steering pump inlet hose)
Brake warn ind ctrl
C12
Chime module (w/o radio) (behind left center of dash)
Connector (dlc) (under left side of dash)
Data link
Driver door latch assembly (at rear of driver door)
Driver information center (dic) display
Driver seat belt buckle
Driver seat belt switch
E9 x200
G302 (behind left kick panel)
G347
G348
Ground
Hazard sw left sig
Hazard sw right sig
Hazard switch
Head
Headlamp & panel dimmer switch
Headlamp sw off sig
Hot at all times
Hot w/ run/crnk relay 15 energized
Ign sw (dlis)/pk3 fuse 22 2a
Ign volt
Ignition key switch
Ignition switch
Inflatable restraint i/p module indicator (w/o manual suppression switch & rv upfitter)
Inflatable restraint sensing & diagnostic module (sdm) (under left front seat)
Instrument panel cluster (ipc)
J202
J203
J244
J248
J313 (in body harness, 11 cm form x307)
J320 (in body harness, 28 cm from seat belt buckle driver x2 connector breakout)
J321 (in passenger seat harness, below passenger seat)
J501 (w/ electric side door lock control)
J601 (w/ electronic side door lock control)
Jx347 (attached to lower left "b" pillar)
Left rear door jamb switch (w/ left rear hinged door) (at left "b" pillar)
Left turn
Lf dr ajar sw sig
Lh seat belt sw
Logic
Low oil pressure ind
Low ref
Lr dr open sw sig
Off
Park
Park brake switch (under left side of dash)
Park brk sw sig
Park lamp signal
Passenger air bag ind
Passenger door latch assembly (at rear of front passenger door)
Passenger seat belt buckle (w/o manual suppression switch & rv upfitter)
Passenger seat belt ind
Passenger seat belt switch
Pnk
Pnk d
Radio
Rdo/chime fuse 20 15a
Red
Rf dr ajar sw sig
Rh seat belt sw
Right rear door jamb switch (cargo/ passenger) (at right "b" pillar)
Right turn
Rr dr open sw sig
Run
Seat belt ind
Serial data
Splice block jx347 (in body harness, attached to lower left "b" pillar)
Splice block jx348 (in body harness, attached to lower right "b" pillar part of g348)
Splice pack jx200 (in dash wiring harness, 10 cm from underhood pass-through grommet breakout)
Start
Switch & rv upfitter
Tan
Tire pressure ind
Turn signal/ multi-function switch
Underhood fuse block (on left side of engine compt)
W/ manual suppression switch
W/ radio
W/o manual suppression
W/o radio
X141
X200
X220
X306
X306 c
X307
X318
X500
X600

WIPER/WASHER

Wiper/Washer Wiring Diagram for Chevrolet Chevy Express G2012 1500

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List of elements for Wiper/Washer Wiring Diagram for Chevrolet Chevy Express G2012 1500:

Body control module (bcm) (behind lower right side of dash)
E11
E12 x200
Front windshield wiper switch hi signal
G102 (4.8l, 5.3l & 6.0l: on left rear of engine) (6.6l: left front lower side of the engine block) (4.3l: right rear of engine)
G302 (behind left kick panel)
Horn/ washer pcb relay k5
Hot at all times
Int
J102
J247
J248
Low reference
Mist
Off
Pnk
Tan
Turn signal/ multi-function switch
Underhood fuse block (on left side of engine compt)
Windshield washer fluid pump (on left front of engine compt, at washer reservoir)
Windshield washer relay control
Windshield washer switch signal
Windshield wiper motor (on left side of firewall)
Windshield wiper motor park switch signal
Windshield wiper switch hi signal
Windshield wiper switch low signal
Windshield wiper switch signal 2
Wpr fuse 55 25a
Wpr pcb relay k13
Wpr-hi pcb relay k3
Wsw fuse 14 15a
X100
X3 k