All Wiring Diagrams for GMC Sierra 2003 1500 – Arabalar için bağlantı şemaları

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 2) for GMC Sierra 2003 1500

List of elements for Automatic A/C Wiring Diagram (1 of 2) for GMC Sierra 2003 1500:

(diesel)
(gasoline)
5v ref
A/c comp cl rly ctrl
A/c comp fuse 10a
A/c compressor clutch
A/c compressor clutch relay
A/c low pressure switch (right side of accumulator)
A/c on
A/c recirc
A/c ref pre sens sig
A/c refrigerant pressure sensor (in a/c muffler hose assembly)
A10
A11
A12
A5 c1
Amb air temp sig
Ambient air temperature sensor (in right front bumper filler assembly
Auto
B c5
B(+)
B10
B11
B12
Blower fuse 40a
Blower motor
Blower motor control processor (behind right side of dash)
Blower speed ctrl
C4 e
C5 c1
Class 2 ser data
Class 2 serial data
Fan dn
Fan up
Frt def
G104 (on left rear of engine block)
G200 (behind right side of dash, near right "a" pillar)
G203 (behind left side of dash, near left "a" pillar)
Ground
Hot at all times
Hot in run
Hot in run or start
Hvac 1 fuse 10a
Hvac control module (behind center of dash)
Hvac/ ecas fuse 10a
I/p relay block (left side of dash)
Ign 3
Ign e fuse 10a
Inside air temp sig
Inside air temperature sensor assembly (in headliner above driver)
Inst lamp dim ctrl
Interior lights system
Left i/p fuse block (lower left side of dash)
Left temp control
Lo lt air temp sig
Lo press sens sig
Lo rt air temp sig
Logic
Low ref
Lower left air temperature sensor (in lower left floor duct assembly)
Lower right air temperature sensor (bottom center of hvac box, in floor duct)
Lt temp door ctrl
Mode
Mode door ctrl
Off
Powertrain control module or engine control module (left front of engine compt)
Recir
Recir door ctrl
Recirc door po sig
Red
Right i/p fuse block (lower right side of dash)
Right temp control
Rt temp door ctrl
S102 (in engine harness)
S207 (in headliner harness)
S218 (in i/p harn)
Sp205 (in i/p harn)
Speed ctrl
Tan
Temp sen ass ctrl
Underhood fuse block (left side of engine compt, near battery)
Up lt air temp sig
Up rt air temp sig
Upper left air temperature sensor (below dash trim panel, in upper duct)
Upper right air temperature sensor (below dash trim panel, in upper duct)

Automatic A/C Wiring Diagram (2 of 2) for GMC Sierra 2003 1500

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List of elements for Automatic A/C Wiring Diagram (2 of 2) for GMC Sierra 2003 1500:

Ambient light sens lo ref
Ambient light sens sig
Ambient light sensor
B12
Body control module (lower left side of dash, below steering column)
Class 2 serial data
Lefft sunload sensor sig
Left air temperature actuator (top center of hvac control assembly)
Left solar sensor
Logic
Mode actuator (left side of hvac module)
Recirculation actuator (top center of hvac module)
Right air temperature actuator (top center of hvac control assembly)
Right i/p fuse block (lower right side of dash)
Right solar sensor
Right sunload sensor sig
Sunload sensor (top center of dash)
Tan

Compressor Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Compressor Wiring Diagram for GMC Sierra 2003 1500:

(diesel)
(gasoline)
5v ref
A/c comp cl rly ctrl
A/c comp fuse 10a
A/c compressor clutch
A/c compressor clutch relay
A/c low pressure switch (right side of accumulator)
A/c on switch
A/c ref pre sens sig
A/c refrigerant pressure sensor (in a/c muffler hose assembly)
A12
B11
Class 2 ser data
Class 2 serial data
G104 (on left rear of engine compt)
Hot at all times
Hot in run or start
Hvac control module (behind center of dash)
Ign e fuse 10a
Lo press sens sig
Logic
Low ref
Powertrain control module or engine control module (left front of engine compt)
Sp205 (in i/p harn)
Underhood fuse block (left side of engine compt, near battery)

Manual A/C Wiring Diagram (1 of 2) for GMC Sierra 2003 1500

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List of elements for Manual A/C Wiring Diagram (1 of 2) for GMC Sierra 2003 1500:

(diesel)
(gasoline)
5v ref
87a
A/c comp cl rly ctrl
A/c comp fuse 10a
A/c compressor clutch
A/c compressor clutch relay
A/c low pressure switch (right side of accumulator)
A/c on switch
A/c recirc
A/c ref pre sens sig
A/c refrigerant pressure sensor (in a/c muffler hose assembly)
A10
A11
A12
A5 c1
B c5
B(+)
B10
B11
B12
Blower fuse 40a
Blower motor (under right side of dash)
Blower motor control switch
Blower motor relay
Blower motor resistor assembly (on hvac module, near blower motor)
Class 2 ser data
Class 2 serial data
Frt def
G104 (on left rear of engine block)
G200 (behind right side of dash, near right "a" pillar)
G203 (behind left side of dash, near left "a" pillar)
Ground
Hot at all times
Hot in run
Hot in run or start
Htr a/c fuse 30a
Hvac 1 fuse 10a
Hvac control module (behind center of dash)
Hvac/ ecas fuse 10a
I/p relay block (left side of dash)
Ign 3
Ign e fuse 10a
Inst lamp dim ctrl
Interior lights system
Left i/p fuse block (lower left side of dash)
Left temp control
Lo press sens sig
Logic
Low ref
Lt temp door ctrl
Mode control
Mode door ctrl
Off
Off blow mt ctrl
Powertrain control module or engine control module (left front of engine compt)
Recir door ctrl
Recirc switch
Red
Right i/p fuse block (lower right side of dash)
Right temp control
Rt temp door ctrl
S102 (in engine harness)
Sp205 (in i/p harn)
Tan
Underhood fuse block (left side of engine compt, near battery)

Manual A/C Wiring Diagram (2 of 2) for GMC Sierra 2003 1500

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List of elements for Manual A/C Wiring Diagram (2 of 2) for GMC Sierra 2003 1500:

(not used)
Ambient light sens lo ref
Ambient light sens sig
Ambient light sensor (top center of dash)
B12
Body control module (lower left side of dash, below steering column)
Class 2 serial data
G200 (behind right side of dash, near "a" pillar)
Left air temperature actuator (top center of hvac control assembly)
Logic
Mode actuator (left side of hvac module)
Recirculation actuator (top center of hvac module)
Right air temperature actuator (top center of hvac control assembly)
Right i/p fuse block (lower right side of dash)
Tan

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram, with Traction Control for GMC Sierra 2003 1500

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List of elements for Anti-lock Brakes Wiring Diagram, with Traction Control for GMC Sierra 2003 1500:

(diesel)
(gas)
Abs fuse 60a
Anti-lock ind
Brake fluid level sw in
Brake fluid level switch (on left side of brake fluid reservoir)
Brake fuse 10a
Brake in
Brake ind
Brake input
C12
C2 b7
C5 c1
C8 a
Clutch start switch (top of clutch clutch assy)
Data link connector (dlc) (below steering column)
Del torque
Delivered torque
Electronic brake control module (ebcm) (on left side of inner frame)
Except seo
G104 (left rear of engine block)
G110 (left front body mount)
G203 (near left "a" pillar)
Hot at all times
Hot in run
Hot in run or start
Ign e fuse 10a
Ignition
Illum lamp
Instrument cluster
Interior lights system
Left front sensor (+)
Left front sensor (-)
Left front wheel speed sensor
Left i/p fuse block (on lower left side of dash)
Logic
M/t only
Nca
Pnk
Powertrain or engine control module (pcm or ecm) (on left front of eng compt or on left side of inner frame)
Red
Req torque
Requested torque
Right front sensor (+)
Right front sensor (-)
Right front wheel speed sensor
S102
S213
Seo
Seo ign fuse 10a
Serial data
Splice pack sp205 (left i/p, under knee bolster trim panel)
Stoplamp switch (on top of brake pedal bracket)
Tan
Tcc brake sw
Trac sw input
Traction control switch
Transfer case shift control module
Transmissions system
Transmissions system (trasfer case circuit)
Underhood fuse block (at left side of eng compt, near battery)
Underhood fuse block (at left side of engine compt, near battery)
Vehicle speed sensor (vss) (4wd: on left side of transfer case, 2wd: left rear side of transmission)
Vss high
Vss input
Vss low
Vss out

Anti-lock Brakes Wiring Diagram, without Traction Control for GMC Sierra 2003 1500

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List of elements for Anti-lock Brakes Wiring Diagram, without Traction Control for GMC Sierra 2003 1500:

(diesel)
(gas)
(not used)
A10
Abs fuse 60a
Anti-lock ind
B1 c9
B10
Brake fluid level sw in
Brake fluid level switch (on left side of brake fluid reservoir)
Brake fuse 10a
Brake ind
Brake input
C12
C2 b7
C9 a
Clutch start switch (top of clutch clutch assy)
Cpp sw sig
Data link connector (dlc) (below steering column)
E6 c1
Electronic brake control module (ebcm) (on left side of inner frame)
Except seo
Front axle act/sw input
G104 (left rear of engine block)
G110 (left front body mount)
Hot at all times
Hot in run
Hot in run or start
Ign e fuse 10a
Ignition
Instrument cluster
Left front sensor (+)
Left front sensor (-)
Left front wheel speed sensor
Left i/p fuse block (on lower left side of dash)
Logic
M/t only
Nca
Pnk
Powertrain or engine control module (pcm or ecm) (on left front of eng compt or on left side of inner frame)
Red
Right front sensor (+)
Right front sensor (-)
Right front wheel speed sensor
S102
Seo
Seo ign fuse 10a
Serial data
Splice pack sp205 (left side of dash)
Stop lamp switch (on top of brake pedal bracket)
Tan
Tcc brake sw
Transfer case shift control module
Transmissions system
Transmissions system (trasfer case circuit)
Underhood fuse block (at left side of eng compt, near battery)
Underhood fuse block (at left side of engine compt, near battery)
Vehicle speed sensor (vss) (4wd: on left side of transfer case, 2wd: left rear side of transmission)
Vss high
Vss input
Vss low
Vss output

ANTI-THEFT

Forced Entry Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Forced Entry Wiring Diagram for GMC Sierra 2003 1500:

(inside driver door)
(inside front passenger door)
(left side of dash, near steering column)
A12
Ajar sw
All times
B12
Base
Battery
Body control module
D12
Door ajar sw sig
Door sw lo ref
Driver door module
Driver mini-wedge door jamb switch
Ex lights ctrl
Exterior lights system
Front passenger door module
Front passenger mini-wedge door jamb switch
G200 (behind right side of dash)
G203 (upper right kick panel)
G305 (bottom of left "b" pillar)
G306 (bottom of right "b" pillar)
Ground
Headlights ctrl
Headlights system
Horn rly ctrl
Horns system
Hot at
I/p fuse block & i/p relay block)
I/p relay block
Key sw
Key sw lo ref
Key sw sig
Left i/p fuse block (lower left side of dash)
Left rear mini-wedge door jamb switch (crew cab)
Lf door ajar sw
Lr door ajar sw
Rf door ajar sw
Right i/p fuse block (lower right side of dash)
Right rear mini-wedge door jamb switch (crew cab)
Rr door ajar sw
Serial data
Splice pack sp205 (left kick panel)
Tan
Tbc batt fuse 10a
Underhood fuse block
Uplevel

Passlock Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Passlock Wiring Diagram for GMC Sierra 2003 1500:

12v reference
A11
A12
B12
Battery
Body control module (lower left side of dash, near steering column)
Class 2 serial data
D12
Data
Data link connector (lower left side of dash)
G203 (behind left side of dash)
Ground
Hot at all times
Hot in run & start
I/p relay block (under left side of dash)
Ign
Ign 1 voltage
Ign sw sig
Ignition key alarm switch (on ignition key cylinder)
Instrument panel cluster
Key
Lock cylinder
Low reference
Magnet
Passlock sensor (internal to steering column)
Pnk
Powertrain control module (on left front of engine compt)
S217 (in steering column harness)
Sec sens sig
Security indicator
Security sensor
Serial data
Splice pack sp205 (upper left kick panel)
Tamper sensor
Tbc batt fuse 10a
Tbc ign 1 fuse 10a
Underhood fuse block

BODY CONTROL MODULES

Body Control Modules Wiring Diagram (1 of 2) for GMC Sierra 2003 1500

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List of elements for Body Control Modules Wiring Diagram (1 of 2) for GMC Sierra 2003 1500:

(base) (upper level)
(bsae)
(upper level)
12 volt ref
A10
A11
A12
Ambiennt light sens sig
Ambient light sensor (top center of dash)
Anbient light sensor
Anti-lock brakes system
Anti-theft system
B10
B11
B12
Battery +
Body control module (on lower left side of dash, below steering column)
Body relay block
Class 2 serial data
Computer data lines system
D12
Defogger system
Dimming input/courtesy lmp pwm
Dimming potentiometer 5volt ref
Door locks system
Driver door unlock rly ctrl
Driver sunload sens sig
Drl off ind
Drl relay ctrl
Drl sw sig
E11
E12
Exterior lights system
Fog light relay ctrl
Front fog lamp sw sig
G203 (behind left side of dash, near "a" pillar)
Ground
Ground distribution system
Headlamp high beam relay ctrl
Headlamp low beam relay ctrl
Headlights system
Horn rly ctrl
Horns system
Hot at all times
I/p lamp dinning ctrl
Interior lamp defeat sw sig
Interior lights system
L solar sensor
Led dimming sig
Left i/p fuse block
Low ref
Park lamp relay ctrl
Park lamp sw on sig
Pass door lock sw lock ctrl
Pass door lock sw unlock ctrl
Passenger sunload sens sig
Pnk
Power distribution system
Power tops system
R solar sensor
Rear defog rly ctrl
Red
Remote radio ctrl sig
Securityn system sens sig
Sound system
Steering wheel position sen sig
Sunload sensor
Tbc 2a fuse 15a
Tbc 2c fuse 15a
Tbc batt fuse 10a
Tow/haul sw sig
Tow/haul switch
Underhood fuse block
W/ automatic a/c
W/ manual a/c

Body Control Modules Wiring Diagram (2 of 2) for GMC Sierra 2003 1500

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List of elements for Body Control Modules Wiring Diagram (2 of 2) for GMC Sierra 2003 1500:

(base)
(crew cab)
(up level)
A10
A11
Accessory volt
B11
B12
Backup lamp sig
Battery +
Body control module (on lower left side of dash, below steering column)
Cargo lamp low ctrl
Courtesy lamps on sig
Door lock ctrl
Door locks system
Door unlock ctrl
Exterior lights system
Headlamp sw flash to pass sig
Headlamp sw headlamp on sig
Headlights system
Hot at all times
Hot in run & acc
Hot in run & start
Hot in run, start & acc
I/p lamps dimmer sw low ref
Ignition 0 volt
Ignition 1 volt
Interior lights system
Key in ignition sw sig
Left front door ajar sw sig
Left i/p fuse block
Left rear door ajar sw sig
Low ref
Park brake sw sig
Park brake switch (part of park brake assembly)
Pnk
Power window lockout lr sig
Power window lockout rr sig
Power window sw lr down sig
Power window sw lr up sig
Power window sw rr down sig
Power window sw rr up sig
Power windows system
Right front door ajar sw sig
Right rear door ajar sw sig
Tbc 2b fuse 15a
Tbc accy fuse 10a
Tbc ign 0 fuse 10a
Tbc ign 1 fuse 10a
Underhood fuse block
Warnings system

COMPUTER DATA LINES

Computer Data Lines Wiring Diagram, Base & Up-Level for GMC Sierra 2003 1500

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List of elements for Computer Data Lines Wiring Diagram, Base & Up-Level for GMC Sierra 2003 1500:

(10/20 series)
(30 series)
(not used)
B11
B12
Body control module (on lower left side of dash, below steering column)
Cig ltr fuse 15a
Data link connector (dlc) (under left side of dash, below steering column)
Digital radio receiver (behind center of dash)
Driver door module (ddm) (in left front door)
Electronic brake control module (ebcm) (on left side of inner frame)
Except 6.6l vin 2 6.6l vin 2
Front passenger door module (fpdm) (in right front door)
G200 (near right "a" pillar)
G203 (near left "a" pillar)
Ground distribution system
Hot at all times
Hvac control module (behind center of dash)
I/p relay block (under left side of dash, near kick panel)
Inflatable restraint sensing/diagnostic module (under left front seat)
Instrument panel cluster (ipc)
Left i/p fuse block (under left side of dash)
Memory seat module (underside of driver seat)
Pnk
Power distribution system
Powertrain control module (pcm)/engine control module (ecm) (on left front of engine compt)
Radio (at center of dash)
Rear seat audio (rsa) controller (under rear of center console)
Rear seat entertainment (rse) assembly (at center of headliner)
Rear wheel steering control module (at left rear of vehicle, near spare tire bracket)
Remote playback device-cd player (center of dash, below radio)
Right i/p fuse block (under right side of dash)
S202
Sp205 (in i/p harness)
Sp207 (left side of dash)
Tan
Transfer case shift control module (behind headlamp switch)
Transmission control module (at left front of eng compt)
Underhood fuse block (at left side of engine compt, near battery)
Vehicle communication interface module (vcim) (behind passenger air bag module)

Computer Data Lines Wiring Diagram, Luxury for GMC Sierra 2003 1500

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List of elements for Computer Data Lines Wiring Diagram, Luxury for GMC Sierra 2003 1500:

(10/20 series)
(30 series)
(not used)
Audio amplifier (under rear of center console)
B10
B11
B12
Body control module (on lower left side of dash, below steering column)
Cig ltr fuse 15a
Data link connector (dlc) (under left side of dash, below steering column)
Digital radio receiver (behind center of dash)
Driver door module (ddm) (in left front door)
Electronic brake control module (ebcm) (on left side of inner frame)
Except 6.6l vin 2 6.6l vin 2
Front passenger door module (fpdm) (in right front door)
G200 (near right "a" pillar)
G203 (near left "a" pillar)
Ground distribution system
Hot at all times
Hvac control module (behind center of dash)
I/p relay block (under left side of dash, near kick panel)
Inflatable restraint sensing/diagnostic module (under left front seat)
Instrument panel cluster (ipc)
Left i/p fuse block (under left side of dash)
Memory seat module (underside of driver seat)
Pnk
Power distribution system
Powertrain control module (pcm)/engine control module (ecm) (on left front of engine compt)
Radio (at center of dash)
Rear seat audio (rsa) controller (under rear of center console)
Rear seat entertainment (rse) assembly (at center of headliner)
Rear wheel steering control module (at left rear of vehicle, near spare tire bracket)
Remote playback device-cd player (at center of dash, below radio)
Right i/p fuse block (under right side of dash)
S202
Sp205 (in i/p harness)
Sp207 (left side of dash)
Tan
Transfer case shift control module (behind headlamp switch)
Transmission control module (at left front of eng compt)
Underhood fuse block (at left side of engine compt, near battery)
Vehicle communication interface module (vcim) (behind passenger air bag module)

CRUISE CONTROL

4.3L VIN X

4.3L VIN X, Cruise Control Wiring Diagram for GMC Sierra 2003 1500

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List of elements for 4.3L VIN X, Cruise Control Wiring Diagram for GMC Sierra 2003 1500:

A/t
A10
Anti- lock brakes system
Brake fuse 10a
Class 2 data
Clutch pedal position switch (top of clutch pedal)
Clutch sw input
Computer data lines system
Cruise control module (left rear of engine compt, on firewall)
Cruise control on/off switch
Cruise engage in
Cruise engage out
Cruise fuse 10a
Cruise ind
Cruise on input
D11
Exterior lights system
F12
G203 (behind left side of dash)
Ground
Hot at all times
Hot in run
I/p relay block
Ign
Ignition
Instrument panel cluster
Left i/p fuse block (on lower left side of dash)
M/t
Nca
Off
Powertrain control module (left front of engine compt)
Radio
Resume/ accel
Resume/accel
Resume/accel sig
S240
Serial data
Set/ coast
Set/coast sig
Stop lps fuse 20a
Stoplamp sw input
Turn signal multifunction switch
Underhood fuse block (near battery)
Veh stop fuse 15a
Vehicle speed sensor (vss) (2wd: left side of transmission) (4wd: left side of transfer case)
Vss high
Vss in
Vss low
Vss out

4.8L VIN V

4.8L VIN V, Cruise Control Wiring Diagram for GMC Sierra 2003 1500

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List of elements for 4.8L VIN V, Cruise Control Wiring Diagram for GMC Sierra 2003 1500:

(not used)
5v ref
A10
Acceleration pedal position sensor (behind accelerator pedal)
App sensor 1 sig
App sensor 2 sig
Class 2 data
Computer data lines system
Cruise control on/off switch
Cruise fuse 10a
Cruise ind
Cruise on sw sig
Etc/ecm fuse 15a
Exterior lights system
F12
G104 (left rear of engine)
Ground
Hot at all times
Hot in run
Hot in run & start
Ign
Ign volt
Instrument panel cluster
Left i/p fuse block (on lower left side of dash)
Low ref
Nca
Off
Pnk
Powertrain control module (left front of engine compt)
Resume/ accel
Resume/accel
Resume/accel sig
S102
S162 (w/ pto) (i/p harn)
S240
Serial data
Set/ coast
Set/coast sig
Stop lps fuse 20a
Stoplamp switch (top of brake pedal)
Tac motor cntrl 1
Tac motor cntrl 2
Tan
Throttle actuator control module (left rear of engine compt)
Throttle body
Tp sensor 1 sig
Tp sensor 2 sig
Turn signal multifunction switch
Under- hood fuse block
Underhood fuse block (near battery)
Veh stop fuse 15a
Vehicle speed sensor (vss) (2wd: left side of transmission) (4wd: left side of transfer case)
Vss high
Vss low

5.3L VIN T

5.3L VIN T, Cruise Control Wiring Diagram for GMC Sierra 2003 1500

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List of elements for 5.3L VIN T, Cruise Control Wiring Diagram for GMC Sierra 2003 1500:

(not used)
5v ref
A10
Acceleration pedal position sensor (behind accelerator pedal)
App sensor 1 sig
App sensor 2 sig
Class 2 data
Computer data lines system
Cruise control on/off switch
Cruise fuse 10a
Cruise ind
Cruise on sw sig
Etc/ecm fuse 15a
Exterior lights system
F12
G104 (left rear of engine)
Ground
Hot at all times
Hot in run
Hot in run & start
Ign
Ign volt
Instrument panel cluster
Left i/p fuse block (on lower left side of dash)
Low ref
Nca
Off
Pnk
Powertrain control module (left front of engine compt)
Resume/ accel
Resume/accel
Resume/accel sig
S102
S162 (w/ pto) (i/p harn)
S240
Serial data
Set/ coast
Set/coast sig
Stop lps fuse 20a
Stoplamp switch (top of brake pedal)
Tac motor cntrl 1
Tac motor cntrl 2
Tan
Throttle actuator control module (left rear of engine compt)
Throttle body
Tp sensor 1 sig
Tp sensor 2 sig
Turn signal multifunction switch
Under- hood fuse block
Underhood fuse block (near battery)
Veh stop fuse 15a
Vehicle speed sensor (vss) (2wd: left side of transmission) (4wd: left side of transfer case)
Vss high
Vss low

6.0L VIN U

6.0L VIN U, Cruise Control Wiring Diagram for GMC Sierra 2003 1500

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List of elements for 6.0L VIN U, Cruise Control Wiring Diagram for GMC Sierra 2003 1500:

(not used)
5v ref
A10
Acceleration pedal position sensor (behind accelerator pedal)
App sensor 1 sig
App sensor 2 sig
Class 2 data
Computer data lines system
Cruise control on/off switch
Cruise fuse 10a
Cruise ind
Cruise on sw sig
Etc/ecm fuse 15a
Exterior lights system
F12
G104 (left rear of engine)
Ground
Hot at all times
Hot in run
Hot in run & start
Ign
Ign volt
Instrument panel cluster
Left i/p fuse block (on lower left side of dash)
Low ref
Nca
Off
Pnk
Powertrain control module (left front of engine compt)
Resume/ accel
Resume/accel
Resume/accel sig
S102
S162 (w/ pto) (i/p harn)
S240
Serial data
Set/ coast
Set/coast sig
Stop lps fuse 20a
Stoplamp switch (top of brake pedal)
Tac motor cntrl 1
Tac motor cntrl 2
Tan
Throttle actuator control module (left rear of engine compt)
Throttle body
Tp sensor 1 sig
Tp sensor 2 sig
Turn signal multifunction switch
Under- hood fuse block
Underhood fuse block (near battery)
Veh stop fuse 15a
Vehicle speed sensor (vss) (2wd: left side of transmission) (4wd: left side of transfer case)
Vss high
Vss low

DEFOGGERS

Heated Mirrors Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Heated Mirrors Wiring Diagram for GMC Sierra 2003 1500:

A7 c1
B11
Battery
Computer data lines system
Ddm fuse 15a
Driver door module (ddm) (below driver door switch panel)
Driver outside rearview mirror
F c3
Front passenger door module (fpdm) (below front passenger door switch panel)
G200 (near right "a" pillar)
Ground
Ground distribution system
Hot at all times
Hvac control module
Left i/p block fuse block (under left side of dash)
Left i/p fuse block (under left side of dash)
Low ref
Passenger outside rearview mirror
Pdm fuse 10a
R def
Right i/p fuse block (under right side of dash)
S202
Serial data
Tan

Rear Defogger Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Rear Defogger Wiring Diagram for GMC Sierra 2003 1500:

(pickup: right "b" pillar) (crewcab: near left "c" pillar)
A c1
A c2
A6 c1
B11
B12
Body control module (below left side of dash)
Computer data lines system
G306 (pickup) g390 (crewcab)
Hot at all times
Hot in run & start
Htr
Hvac control module (behind center of dash)
I/p relay block (below left side of dash)
Ign
L c10
Logic
Rear defogger relay
Rear window defogger grid
Relay cntrl
Serial data

ELECTRONIC POWER STEERING

Rear Wheel Steering Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Rear Wheel Steering Wiring Diagram for GMC Sierra 2003 1500:

12v ref
2ws ind ctrl
4ws fuse 15a
4ws ind ctrl
5 volt ref
5v ref
B+ volt
B11
Base
Body control module (on lower left side of dash, below steering column)
C1 b5
C1 c5
Case gnd
Case ground
Combination yaw rate sensor/lateral accelerometer sensor (under front passenger seat)
Computer data lines system
Cruise fuse 10a
D12
G101
G203 (near left "a" pillar)
Gnd
Hall a sig
Hall b sig
Hall c sig
Hot at all times
Hot in run
I/p relay block (lower left side of dash)
Ign 3 fuse 10a
Ign 3 volt
Instrument cluster system
Interior lights system
Lat accel sig
Left i/p fuse block
Low ref
Mega fuse 125a
Mode ind ctrl
Mode sw sig
Phase a ctrl
Phase b ctrl
Phase c ctrl
Pnk
Pos 1 sig
Pos 2 sig
Pos a sig
Pos b sig
Power distribution system
Pulse sig
Rear wheel position sensor (left rear of vehicle)
Rear wheel steering control module (near spare tire bracket)
Rear wheel steering mode select switch
Red
Rly gnd
Rly volt
S212 (in i/p harness)
S240 (in steering pnk column harness)
S241 (in steering column harness)
Sens gnd
Sens ref
Sens sig
Serial data
Steering gear motor assembly (near spare tire bracket)
Steering wheel speed/ position sensor (on steering column)
Tan
Tan c
Underhood fuse block
Underhood fuse holder
Vss
Yaw sens sig

ELECTRONIC SUSPENSION

Electronic Suspension Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Electronic Suspension Wiring Diagram for GMC Sierra 2003 1500:

(in cahssis harn) s350
Firm
Firm indicator
G200 (behind right side of dash, near right "a" pillar)
G302 (on left rear body mount)
G401 (on spare tire hoist bracket)
Hot in run or start
I/p relay block (below left side of dash, left of steering column)
Illum
Interior lights system
Left front shock absorber solenoid
Left rear shock absorber solenoid
Off
Pnk
Right front shock absorber solenoid
Right rear shock absorber solenoid
Selectable ride switch
Seo ign fuse 10a
Solid state
Underhood fuse block (at left side of eng compt, near battery)

ENGINE PERFORMANCE

4.3L VIN X

4.3L VIN X, Engine Performance Wiring Diagram (1 of 4) for GMC Sierra 2003 1500

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List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (1 of 4) for GMC Sierra 2003 1500:

(below steering column) data link connector
(bottom front of engine) crankshaft position sensor
(right rear of engine block)
+5v
3-2 ss
A/c system
A12
Anti-lock brakes system
B10
B12
Body control module (below steering column)
Brk sw
C10
Ckp sig
Cls 2 data
Clutch sw
Cmp
Coolant lev
D10
E10
E11
Ect sig
Engine oil pressure (eop) sensor
G103
Gnd
Ho2s hi
Ho2s lo
Hot at all times
Hot in accy, run & start
Hot in run & start
Ign
Ign 0 fuse 10a
Inj 1 ctrl
Inj 2 ctrl
Inj 3 ctrl
Inj 4 ctrl
Inj 5 ctrl
Inj 6 ctrl
Inj1 fuse 15a
Inj2 fuse 15a
Injectors
Left i/p fuse block
Low ref
Nca
O2a fuse 15a
O2b fuse 15a
Oil lev
Pcm1 fuse 15a
Pcmb fuse 20a
Pnk
Pnk b
Pnk d
Pnk e
Pnk h
Pnk j
Pnk l
Powertrain control module (pcm) (left front of engine compt)
Prnd a
Prnd b
Prnd p
Range b
Range c
Red
Ref low
Rly ctrl
S103
S110
Sens gnd
Sensor sig
Sp205 (in i/p harness)
Starting system
Tan
Torque sig
Underhood junction block

4.3L VIN X, Engine Performance Wiring Diagram (2 of 4) for GMC Sierra 2003 1500

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List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (2 of 4) for GMC Sierra 2003 1500:

(left rear of engine) g104
(not used)
Engine coolant level switch (in coolant reservoir)
Engine coolant temperature sensor (rear side of left cylinder head)
Engine oil level switch (right side of oil pan)
Fuel pump & sender assembly (in fuel tank)
Fuel pump relay
G103 (right rear of engine)
G104 (left rear of engine)
G110 (left front body mount)
Heated oxygen sensor (bank 1 sensor 1) (left exh pipe, before converter)
Heated oxygen sensor (bank 1 sensor 2) (left exh pipe, after converter)
Heated oxygen sensor (bank 2 sensor 1) (right exh pipe, before converter)
Heated oxygen sensor (bank 2 sensor 2) (right exh pipe, after converter)
Hot at all times
Knock sensor (rear of engine block)
Nca
Park/neutral position switch (left side of transmission)
Pcm b fuse 20a
Pnk
Red
S102
S103
S312
Tan
Throttle position sensor (on throttle body assy)
Under- hood fuse block

4.3L VIN X, Engine Performance Wiring Diagram (3 of 4) for GMC Sierra 2003 1500

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List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (3 of 4) for GMC Sierra 2003 1500:

(in chassis harn)
1-2 sol
2-3 sol
3-2 sol
A red
A/t fluid pressure manual valve position switch
Automatic transaxle
Brake fuse 10a
C12
Camshaft position sensor (in distributor)
Clutch start switch (top of pedal bracket)
Cruise control system
E11
Evaporative emissions canister purge solenoid (right front side of engine)
Evaporative emissions canister vent solenoid (right front side of fuel tank)
Fuel tank pressure sensor (in fuel tank)
G103 (right rear of engine)
Gnd
Hot in accy, run & start
Hot in run
Iat sensor
Ign
Ign0 fuse 10a
Instrument cluster system
Intake air temperature (iat)/mass airflow (maf) sensor (in air induction tube)
Left i/p fuse block
Manifold absolute pressure sensor (top rear of engine)
N pnk
P red
Pc sol valve
Pnk
Pnk a
Pnk d
Power distribution system
Red
Red/
Rev
S103
S150
Signal
Stop- lamp switch (top of brake pedal bracket)
Tan
Tan b
Tcc pwm sol
Tcc sol
Tft sensor
Under- hood junction block
Underhood fuse block
Vehicle speed sensor (left rear of transmission)

4.3L VIN X, Engine Performance Wiring Diagram (4 of 4) for GMC Sierra 2003 1500

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List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (4 of 4) for GMC Sierra 2003 1500:

(lower right front of eng block)
1-2 ss ctrl
2-3 ss ctrl
4wd low
4ws fuse 15a
A/c clu
A/c system
Anti-lock brake system (speed signal)
Anti-lock brakes system
B11
Coil driver
Coil wire
Crank fuse 10a
Crank voltage
Cruise control system a/c system
Cruise eng
Distributor
Evap vent ctrl
Fld sig
Front axle actuator (right side of center on axle housing)
Frt axle sw
Fuel lev
Fuel sig ctrl
G102
G103 (right rear of engine)
Gen l
Gnd
Hot at all times
Hot in run & start
Hot in start
Htr low ctrl
Iac coil hi
Iac coil lo
Iat sig
Ic timing ctrl
Idle air control valve (on throttle body)
Ign
Ign feed
Ignition coil
Ignition control module (right rear of engine)
Instrument cluster systems (speed signal)
Instrument panel cluster
Ipc/dic fuse 10a
Logic
Low ref
Maf sig
Malfunction indicator lamp
Map sig
Mil ctrl
Oil press sig
Pc sol hi
Pc sol lo
Pmp rly ctrl
Pnk
Pnk a
Powertrain control module (pcm) (left front of engine compt)
Prnd c
Red
Rpm out
S103
Sens gnd
Sens sig
Sol ctrl
Starting/ charging system
Starting/charging system
Sw sig
Tan
Tcc pwm
Tcc sol ctrl
Tft sens sig
Timing
Torque sig
Tp sig
Trans rng a
Trans- missions system
Transfer case shift control module (left front of transaxle case)
Under- hood junction block
Vss high
Vss low
Vss out

4.8L VIN V

4.8L VIN V, Engine Performance Wiring Diagram (1 of 5) for GMC Sierra 2003 1500

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List of elements for 4.8L VIN V, Engine Performance Wiring Diagram (1 of 5) for GMC Sierra 2003 1500:

(below steering column) data link connector
(lower right rear of engine) crankshaft position (ckp) sensor
+5v
3-2 ss ctrl
A/c system
Anti-lock brakes sys
Body control module (below steering column)
Brk sw sig
C10
Ckp sig
Cls 2 data
Cmp sig
Cpp sw sig
D10
E10
E11
Ect sig
Electronic suspension system
Fuel comp sig
G103 (right rear of engine)
Gnd
Ho2s hi sig
Ho2s lo
Hot at all times
Hot in accy, run & start
Hot in run & start
Ign
Ign 0 fuse 10a
Inj 1 ctrl
Inj 2 ctrl
Inj 3 ctrl
Inj 4 ctrl
Inj 5 ctrl
Inj 6 ctrl
Inj 7 ctrl
Inj 8 ctrl
Inj1 fuse 15a
Inj2 fuse 15a
Injectors
Ks signal
Left i/p fuse block
Lev sw sig
Lift/dive sig
O2a fuse 15a
O2b fuse 15a
Oil lev sw sig
Pcmb fuse 20a
Pnk
Pnk a
Powertrain control module (left front of engine compt)
Prnd a sig
Prnd b sig
Prnd p sig
Range b
Range c
Red
Ref low
Ref low (a/t)
Req torq sig
Rly ctrl
S103
S110
Serial data
Sp205 (in i/p harness)
Starting/ charging system
Tan
Under- hood fuse block

4.8L VIN V, Engine Performance Wiring Diagram (2 of 5) for GMC Sierra 2003 1500

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List of elements for 4.8L VIN V, Engine Performance Wiring Diagram (2 of 5) for GMC Sierra 2003 1500:

(4l60)
(4l80)
(dual tanks)
(in secondary fuel tank) fuel pump & sender assembly (secondary)
(left rear of engine) g104
(not used)
(right rear of engine)
Coolant level switch (in coolant reservoir)
Engine coolant temperature sensor (front of left cylinder head)
Engine oil level switch (right side of oil pan)
Fuel pump & sender assembly (primary) (in fuel tank)
Fuel pump relay
Fuel pump relay (secondary) (dual tanks) (on underhood fuse block bracket)
G103
G103 (right rear of engine)
G104 (left rear of engine)
G110 (left front body mount)
Heated oxygen sensor (bank 1 sensor 1) (left exh pipe, before converter)
Heated oxygen sensor (bank 1 sensor 2) (left exh pipe, after converter)
Heated oxygen sensor (bank 2 sensor 1) (right exh pipe, before converter)
Heated oxygen sensor (bank 2 sensor 2) (right exh pipe, after converter)
Hot at all times
Hot in run & start
Knock sensor (under intake manifold)
Nca
Park/neutral position switch (left side of transmission)
Pcm b fuse 20a
Pcm1 fuse 15a
Pnk
Red
S102
S103
S312
Tan
Under- hood fuse block
Underhood fuse block

4.8L VIN V, Engine Performance Wiring Diagram (3 of 5) for GMC Sierra 2003 1500

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List of elements for 4.8L VIN V, Engine Performance Wiring Diagram (3 of 5) for GMC Sierra 2003 1500:

(4l60e)
(4l60e) s
1-2 sol
2-3 sol
3-2 sol
A red
A/t fluid pressure manual valve position switch
Automatic transaxle
Brake fuse 10a
C12
Camshaft position sensor (top center rear of engine)
Engine oil pressure (eop) sensor (top rear of engine)
Evaporative emissions (evap) canister purge solenoid (behind throttle body)
Evaporative emissions canister vent solenoid (right front side of fuel tank)
F12
Fuel tank pressure sensor (in fuel tank)
Hot at all times
Hot in run
Instrument cluster system
Left i/p fuse block
Manifold absolute pressure sensor (top rear of engine)
N pnk
P red
Pc sol valve
Pnk
Pnk a
Red
Red/
Rev
S150
Stop lps fuse 20a
Stop- lamp switch (top of brake pedal bracket)
Tan
Tcc pwm sol
Tcc sol
Tft sensor
Under- hood fuse block
Underhood fuse block
Vehicle speed sensor (rear of transmission/ transfer case)

4.8L VIN V, Engine Performance Wiring Diagram (4 of 5) for GMC Sierra 2003 1500

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List of elements for 4.8L VIN V, Engine Performance Wiring Diagram (4 of 5) for GMC Sierra 2003 1500:

(behind accelerator pedal) accelerator pedal position sensor
(in transmission) (4l80e) automatic transmission input shaft speed sensor
4ws fuse 15a
A10
Act cntrl
App sens 1
App sens 2
Cruise control system
Cruise req
Data
E11
Ect/ecm fuse 15a
Fuel composition sensor (flex fuel)
G103 (right rear of engine)
G104 (left rear of engine)
Gnd
Ground
Hot at all times
Hot in run & start
Hot in run or start
Iat sensor
Ign
Ign0 fuse 10a
Intake air temperature (iat)/ mass airflow (maf) sensor (in air induction tube)
Left i/p fuse block
Not used
Pnk
R/a input
Red
Ref low
S/c input
S102
S103
Signal
Stp lp in
Tac ctrl
Tan
Throttle actuator control module (rear of engine compt)
Throttle body
Tp sens 1
Tp sens 2
Underhood fuse block
Veh stop fuse 15a

4.8L VIN V, Engine Performance Wiring Diagram (5 of 5) for GMC Sierra 2003 1500

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List of elements for 4.8L VIN V, Engine Performance Wiring Diagram (5 of 5) for GMC Sierra 2003 1500:

(in ignition coil jumper harness)
(in injector jumper harness)
(left rear of engine) g104
(left side of engine) g102
1-2 ss ctrl
2-3 ss ctrl
4wd low sig
A/c system
A12
Air conditioning system
Anti-lock brakes system
At iss high sig
At iss low sig
Axle sw sig
B10
B11
Clu rly ctrl
Crank fuse 10a
Crank volt
Css sig
Ctrl
Cycle sig
Delivered torq
Evap canp ctrl
Evap vent ctrl
Exc seo
Fuel lev sens
Fuel lev sig
Fuel press sig
G103 (right rear of engine)
Gnd
Ho2s htr low
Ho2s low ctrl
Hot at all times
Hot in run & start
Hot in start
Iat sig
Ign
Ign ctrl
Ign feed
Ignition coils
Ind ctrl
Instrument cluster system
Instrument panel cluster
Ipc/dic fuse 10a
Logic
Maf sig
Malfunction indicator lamp
Map sig
Mil ctrl
Nca
Nca nca
Pc sol hi ctrl
Pc sol lo ctrl
Pcm1 fuse 15a
Pmp rly ctrl
Pnk
Pnk d
Powertrain control module (left front of engine compt)
Press sens sig
Prnd c sig
Red
Red c
Ref lo
Ref low
Rpm out
S103
S151
S152
S153
S154
S157
Seo
Seo b1 fuse 15a
Spark plug
Starting/charging system
Tan
Tcc pwm ctrl
Tcc sol ctrl
Tft sens sig
Transmissions system
Underhood fuse block
Vss high sig
Vss low sig
Vss out

5.3L VIN T

5.3L VIN T, Engine Performance Wiring Diagram (1 of 5) for GMC Sierra 2003 1500

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List of elements for 5.3L VIN T, Engine Performance Wiring Diagram (1 of 5) for GMC Sierra 2003 1500:

(below steering column) data link connector
(lower right rear of engine) crankshaft position (ckp) sensor
+5v
3-2 ss ctrl
A/c system
Anti-lock brakes sys
Body control module (below steering column)
Brk sw sig
C10
Ckp sig
Cls 2 data
Cmp sig
Cpp sw sig
D10
E10
E11
Ect sig
Electronic suspension system
Fuel comp sig
G103 (right rear of engine)
Gnd
Ho2s hi sig
Ho2s lo
Hot at all times
Hot in accy, run & start
Hot in run & start
Ign
Ign 0 fuse 10a
Inj 1 ctrl
Inj 2 ctrl
Inj 3 ctrl
Inj 4 ctrl
Inj 5 ctrl
Inj 6 ctrl
Inj 7 ctrl
Inj 8 ctrl
Inj1 fuse 15a
Inj2 fuse 15a
Injectors
Ks signal
Left i/p fuse block
Lev sw sig
Lift/dive sig
O2a fuse 15a
O2b fuse 15a
Oil lev sw sig
Pcmb fuse 20a
Pnk
Pnk a
Powertrain control module (left front of engine compt)
Prnd a sig
Prnd b sig
Prnd p sig
Range b
Range c
Red
Ref low
Ref low (a/t)
Req torq sig
Rly ctrl
S103
S110
Serial data
Sp205 (in i/p harness)
Starting/ charging system
Tan
Under- hood fuse block

5.3L VIN T, Engine Performance Wiring Diagram (2 of 5) for GMC Sierra 2003 1500

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List of elements for 5.3L VIN T, Engine Performance Wiring Diagram (2 of 5) for GMC Sierra 2003 1500:

(4l60)
(4l80)
(dual tanks)
(in secondary fuel tank) fuel pump & sender assembly (secondary)
(left rear of engine) g104
(not used)
(right rear of engine)
Coolant level switch (in coolant reservoir)
Engine coolant temperature sensor (front of left cylinder head)
Engine oil level switch (right side of oil pan)
Fuel pump & sender assembly (primary) (in fuel tank)
Fuel pump relay
Fuel pump relay (secondary) (dual tanks) (on underhood fuse block bracket)
G103
G103 (right rear of engine)
G104 (left rear of engine)
G110 (left front body mount)
Heated oxygen sensor (bank 1 sensor 1) (left exh pipe, before converter)
Heated oxygen sensor (bank 1 sensor 2) (left exh pipe, after converter)
Heated oxygen sensor (bank 2 sensor 1) (right exh pipe, before converter)
Heated oxygen sensor (bank 2 sensor 2) (right exh pipe, after converter)
Hot at all times
Hot in run & start
Knock sensor (under intake manifold)
Nca
Park/neutral position switch (left side of transmission)
Pcm b fuse 20a
Pcm1 fuse 15a
Pnk
Red
S102
S103
S312
Tan
Under- hood fuse block
Underhood fuse block

5.3L VIN T, Engine Performance Wiring Diagram (3 of 5) for GMC Sierra 2003 1500

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List of elements for 5.3L VIN T, Engine Performance Wiring Diagram (3 of 5) for GMC Sierra 2003 1500:

(4l60e)
(4l60e) s
1-2 sol
2-3 sol
3-2 sol
A red
A/t fluid pressure manual valve position switch
Automatic transaxle
Brake fuse 10a
C12
Camshaft position sensor (top center rear of engine)
Engine oil pressure (eop) sensor (top rear of engine)
Evaporative emissions (evap) canister purge solenoid (behind throttle body)
Evaporative emissions canister vent solenoid (right front side of fuel tank)
F12
Fuel tank pressure sensor (in fuel tank)
Hot at all times
Hot in run
Instrument cluster system
Left i/p fuse block
Manifold absolute pressure sensor (top rear of engine)
N pnk
P red
Pc sol valve
Pnk
Pnk a
Red
Red/
Rev
S150
Stop lps fuse 20a
Stop- lamp switch (top of brake pedal bracket)
Tan
Tcc pwm sol
Tcc sol
Tft sensor
Under- hood fuse block
Underhood fuse block
Vehicle speed sensor (rear of transmission/ transfer case)

5.3L VIN T, Engine Performance Wiring Diagram (4 of 5) for GMC Sierra 2003 1500

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List of elements for 5.3L VIN T, Engine Performance Wiring Diagram (4 of 5) for GMC Sierra 2003 1500:

(behind accelerator pedal) accelerator pedal position sensor
(in transmission) (4l80e) automatic transmission input shaft speed sensor
4ws fuse 15a
A10
Act cntrl
App sens 1
App sens 2
Cruise control system
Cruise req
Data
E11
Ect/ecm fuse 15a
Fuel composition sensor (flex fuel)
G103 (right rear of engine)
G104 (left rear of engine)
Gnd
Ground
Hot at all times
Hot in run & start
Hot in run or start
Iat sensor
Ign
Ign0 fuse 10a
Intake air temperature (iat)/ mass airflow (maf) sensor (in air induction tube)
Left i/p fuse block
Not used
Pnk
R/a input
Red
Ref low
S/c input
S102
S103
Signal
Stp lp in
Tac ctrl
Tan
Throttle actuator control module (rear of engine compt)
Throttle body
Tp sens 1
Tp sens 2
Underhood fuse block
Veh stop fuse 15a

5.3L VIN T, Engine Performance Wiring Diagram (5 of 5) for GMC Sierra 2003 1500

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List of elements for 5.3L VIN T, Engine Performance Wiring Diagram (5 of 5) for GMC Sierra 2003 1500:

(in ignition coil jumper harness)
(in injector jumper harness)
(left rear of engine) g104
(left side of engine) g102
1-2 ss ctrl
2-3 ss ctrl
4wd low sig
A/c system
A12
Air conditioning system
Anti-lock brakes system
At iss high sig
At iss low sig
Axle sw sig
B10
B11
Clu rly ctrl
Crank fuse 10a
Crank volt
Css sig
Ctrl
Cycle sig
Delivered torq
Evap canp ctrl
Evap vent ctrl
Exc seo
Fuel lev sens
Fuel lev sig
Fuel press sig
G103 (right rear of engine)
Gnd
Ho2s htr low
Ho2s low ctrl
Hot at all times
Hot in run & start
Hot in start
Iat sig
Ign
Ign ctrl
Ign feed
Ignition coils
Ind ctrl
Instrument cluster system
Instrument panel cluster
Ipc/dic fuse 10a
Logic
Maf sig
Malfunction indicator lamp
Map sig
Mil ctrl
Nca
Nca nca
Pc sol hi ctrl
Pc sol lo ctrl
Pcm1 fuse 15a
Pmp rly ctrl
Pnk
Pnk d
Powertrain control module (left front of engine compt)
Press sens sig
Prnd c sig
Red
Red c
Ref lo
Ref low
Rpm out
S103
S151
S152
S153
S154
S157
Seo
Seo b1 fuse 15a
Spark plug
Starting/charging system
Tan
Tcc pwm ctrl
Tcc sol ctrl
Tft sens sig
Transmissions system
Underhood fuse block
Vss high sig
Vss low sig
Vss out

6.0L VIN U

6.0L VIN U, Engine Performance Wiring Diagram (1 of 5) for GMC Sierra 2003 1500

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List of elements for 6.0L VIN U, Engine Performance Wiring Diagram (1 of 5) for GMC Sierra 2003 1500:

(below steering column) data link connector
(lower right rear of engine) crankshaft position (ckp) sensor
+5v
3-2 ss ctrl
A/c system
Anti-lock brakes sys
Body control module (below steering column)
Brk sw sig
C10
Ckp sig
Cls 2 data
Cmp sig
Cpp sw sig
D10
E10
E11
Ect sig
Electronic suspension system
Fuel comp sig
G103 (right rear of engine)
Gnd
Ho2s hi sig
Ho2s lo
Hot at all times
Hot in accy, run & start
Hot in run & start
Ign
Ign 0 fuse 10a
Inj 1 ctrl
Inj 2 ctrl
Inj 3 ctrl
Inj 4 ctrl
Inj 5 ctrl
Inj 6 ctrl
Inj 7 ctrl
Inj 8 ctrl
Inj1 fuse 15a
Inj2 fuse 15a
Injectors
Ks signal
Left i/p fuse block
Lev sw sig
Lift/dive sig
O2a fuse 15a
O2b fuse 15a
Oil lev sw sig
Pcmb fuse 20a
Pnk
Pnk a
Powertrain control module (left front of engine compt)
Prnd a sig
Prnd b sig
Prnd p sig
Range b
Range c
Red
Ref low
Ref low (a/t)
Req torq sig
Rly ctrl
S103
S110
Serial data
Sp205 (in i/p harness)
Starting/ charging system
Tan
Under- hood fuse block

6.0L VIN U, Engine Performance Wiring Diagram (2 of 5) for GMC Sierra 2003 1500

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List of elements for 6.0L VIN U, Engine Performance Wiring Diagram (2 of 5) for GMC Sierra 2003 1500:

(4l60)
(4l80)
(dual tanks)
(in secondary fuel tank) fuel pump & sender assembly (secondary)
(left rear of engine) g104
(not used)
(right rear of engine)
Coolant level switch (in coolant reservoir)
Engine coolant temperature sensor (front of left cylinder head)
Engine oil level switch (right side of oil pan)
Fuel pump & sender assembly (primary) (in fuel tank)
Fuel pump relay
Fuel pump relay (secondary) (dual tanks) (on underhood fuse block bracket)
G103
G103 (right rear of engine)
G104 (left rear of engine)
G110 (left front body mount)
Heated oxygen sensor (bank 1 sensor 1) (left exh pipe, before converter)
Heated oxygen sensor (bank 1 sensor 2) (left exh pipe, after converter)
Heated oxygen sensor (bank 2 sensor 1) (right exh pipe, before converter)
Heated oxygen sensor (bank 2 sensor 2) (right exh pipe, after converter)
Hot at all times
Hot in run & start
Knock sensor (under intake manifold)
Nca
Park/neutral position switch (left side of transmission)
Pcm b fuse 20a
Pcm1 fuse 15a
Pnk
Red
S102
S103
S312
Tan
Under- hood fuse block
Underhood fuse block

6.0L VIN U, Engine Performance Wiring Diagram (3 of 5) for GMC Sierra 2003 1500

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List of elements for 6.0L VIN U, Engine Performance Wiring Diagram (3 of 5) for GMC Sierra 2003 1500:

(4l60e)
(4l60e) s
1-2 sol
2-3 sol
3-2 sol
A red
A/t fluid pressure manual valve position switch
Automatic transaxle
Brake fuse 10a
C12
Camshaft position sensor (top center rear of engine)
Engine oil pressure (eop) sensor (top rear of engine)
Evaporative emissions (evap) canister purge solenoid (behind throttle body)
Evaporative emissions canister vent solenoid (right front side of fuel tank)
F12
Fuel tank pressure sensor (in fuel tank)
Hot at all times
Hot in run
Instrument cluster system
Left i/p fuse block
Manifold absolute pressure sensor (top rear of engine)
N pnk
P red
Pc sol valve
Pnk
Pnk a
Red
Red/
Rev
S150
Stop lps fuse 20a
Stop- lamp switch (top of brake pedal bracket)
Tan
Tcc pwm sol
Tcc sol
Tft sensor
Under- hood fuse block
Underhood fuse block
Vehicle speed sensor (rear of transmission/ transfer case)

6.0L VIN U, Engine Performance Wiring Diagram (4 of 5) for GMC Sierra 2003 1500

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List of elements for 6.0L VIN U, Engine Performance Wiring Diagram (4 of 5) for GMC Sierra 2003 1500:

(behind accelerator pedal) accelerator pedal position sensor
(in transmission) (4l80e) automatic transmission input shaft speed sensor
4ws fuse 15a
A10
Act cntrl
App sens 1
App sens 2
Cruise control system
Cruise req
Data
E11
Ect/ecm fuse 15a
Fuel composition sensor (flex fuel)
G103 (right rear of engine)
G104 (left rear of engine)
Gnd
Ground
Hot at all times
Hot in run & start
Hot in run or start
Iat sensor
Ign
Ign0 fuse 10a
Intake air temperature (iat)/ mass airflow (maf) sensor (in air induction tube)
Left i/p fuse block
Not used
Pnk
R/a input
Red
Ref low
S/c input
S102
S103
Signal
Stp lp in
Tac ctrl
Tan
Throttle actuator control module (rear of engine compt)
Throttle body
Tp sens 1
Tp sens 2
Underhood fuse block
Veh stop fuse 15a

6.0L VIN U, Engine Performance Wiring Diagram (5 of 5) for GMC Sierra 2003 1500

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List of elements for 6.0L VIN U, Engine Performance Wiring Diagram (5 of 5) for GMC Sierra 2003 1500:

(in ignition coil jumper harness)
(in injector jumper harness)
(left rear of engine) g104
(left side of engine) g102
1-2 ss ctrl
2-3 ss ctrl
4wd low sig
A/c system
A12
Air conditioning system
Anti-lock brakes system
At iss high sig
At iss low sig
Axle sw sig
B10
B11
Clu rly ctrl
Crank fuse 10a
Crank volt
Css sig
Ctrl
Cycle sig
Delivered torq
Evap canp ctrl
Evap vent ctrl
Exc seo
Fuel lev sens
Fuel lev sig
Fuel press sig
G103 (right rear of engine)
Gnd
Ho2s htr low
Ho2s low ctrl
Hot at all times
Hot in run & start
Hot in start
Iat sig
Ign
Ign ctrl
Ign feed
Ignition coils
Ind ctrl
Instrument cluster system
Instrument panel cluster
Ipc/dic fuse 10a
Logic
Maf sig
Malfunction indicator lamp
Map sig
Mil ctrl
Nca
Nca nca
Pc sol hi ctrl
Pc sol lo ctrl
Pcm1 fuse 15a
Pmp rly ctrl
Pnk
Pnk d
Powertrain control module (left front of engine compt)
Press sens sig
Prnd c sig
Red
Red c
Ref lo
Ref low
Rpm out
S103
S151
S152
S153
S154
S157
Seo
Seo b1 fuse 15a
Spark plug
Starting/charging system
Tan
Tcc pwm ctrl
Tcc sol ctrl
Tft sens sig
Transmissions system
Underhood fuse block
Vss high sig
Vss low sig
Vss out

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Back-up Lamps Wiring Diagram for GMC Sierra 2003 1500:

(30 series chassis cab)
(30 series except chassis cab)
(below left side of dash) i/p relay block
(left side of transmission) back-up lamp switch
10/20 series
A/t
A11
B/u lmp vlt
B/u lmps sig
B/u lp fuse 20a
Back-up alarm
Body control module (bcm) (on lower left side of dash, below steering column)
F10
G302 (on left rear body mount)
G401 (on spare tire hoist bracket)
G403 (on left rear frame body mount bracket)
Hot in run or start
Left back-up lamp
M/t
Park/neutral position (pnp) switch (left side of transmission)
Pnk
Rear lamps junction block
Right back-up lamp
Trailer connector
Trlr b/u fuse 10a
Underhood fuse block (left side of eng compt, near battery)

Exterior Lamps Wiring Diagram (1 of 3) for GMC Sierra 2003 1500

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List of elements for Exterior Lamps Wiring Diagram (1 of 3) for GMC Sierra 2003 1500:

(30 series except chassis cab)
(30 series chassis cab)
10/20 series
Anl/
Auto
Back-up lamps circuit
Body control module (bcm) (on lower left side of dash, below steering column)
C2 b2
Computer data lines system
D10
Drl
F11
Frt park fuse 10a
G100 (lower left side of radiator core support)
G203 (behind left side of dash, near left "a" pillar)
G302 (on left rear body mount)
G401 (on spare tire hoist bracket)
G403 (on left rear frame body mount bracket)
Hazard switch
Head
Headlamp switch
Hot at all times
Hot in run and start
I/p relay block
Ign e fuse 10a
Left
Left front marker lamp
Left front park/ turn signal lamp
Park
Park lamp relay
Pnk
Prk lmp on
Prk lmp rly
Red
Right
Right front marker lamp
Right front park/ turn signal lamp
S100
S101
S217
Serial data
Stud 1 fuse 40a
Stud 2 fuse 30a
To trl park fuse (diagram 2 0f 3)
Trailer connector
Turn signal/ multi- function switch
Under- hood fuse block (on left side of engine compt)

Exterior Lamps Wiring Diagram (2 of 3) for GMC Sierra 2003 1500

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List of elements for Exterior Lamps Wiring Diagram (2 of 3) for GMC Sierra 2003 1500:

(30 series except chassis cab)
(30 series chassis cab)
(except w/ 4-wheel steering)
(w/ roof marker lamps)
(w/ 4-wheel steering)
(w/ pto)
10/20 series
A12
C1 b
C1 d
C1 g
C1 h
C2 d
C3 b6
C3 d
C3 h
C4 f
D12
E11
F12
From a frt park fuse (diagram 1 0f 3)
G302 (on left rear body mount)
G304 (except crewcab) (under left front seat)
G305 (crewcab) (on left "b" pillar)
G401 (on spare tire hoist bracket)
G403 (on left rear frame body mount bracket)
Hot at all times
I/p relay block
Int park fuse 10a
Interior lights system
Left front clear- ance lamp
Left license lamp
Left rear clear- ance lamp
Left rear turn signal
Left tail/ stop- lamp
Lr park fuse 10a
Rear lamps junction block
Red
Right front clear- ance lamp
Right i/p fuse block
Right license lamp
Right rear clear- ance lamp
Right rear turn signal
Right tail/ stop- lamp
Roof beacon relay (at lower left "b" pillar
Roof beacon switch
Rr park fuse 10a
S206 (in i/p harn)
S219 (in brake clutch harn)
S336 (w/ thermo console)
S903
S904
S905
S907
S914
Seo b1 fuse 15a
Seo b2 fuse 30a
Stop lp fuse 25a
Stop- lamp switch
Tailgate marker lamp
Trl park fuse 15a
Under- hood fuse block (on left side of engine compt)

Exterior Lamps Wiring Diagram (3 of 3) for GMC Sierra 2003 1500

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List of elements for Exterior Lamps Wiring Diagram (3 of 3) for GMC Sierra 2003 1500:

(behind right side of dash, near right "a" pillar)
(behind right side of dash, near right "a" pillar) g200
(w/ level 3 convenience package)
A11
Battery
C10
C3 e1
C6 right i/p fuse block
Center high mounted stop lamp (chmsl)
Clearance lamps
Computer data lines system
D10
Driver door module (ddm) (behind drivers door trim panel, below switch assembly)
Driver outside rearview mirror
E10
Ext- erior illum lamp
F10
Flash fuse 25a
Front passenger door module (fpdm) (behind front pass- engers door trim panel, below switch assembly)
G200
G200 (behind right side of dash, near right "a" pillar)
G203 (behind left side of dash, near left "a" pillar)
Ground
Hazard sw
Hot at all times
I/p relay block
I/p relay block (below left side of dash)
Instrument panel cluster (ipc)
Left i/p fuse block (on lower left side of dash)
Left roof l marker lamp
Left turn ind
Logic
Lr lamp volt
Lt door lmp gnd
Lt door lmp pwr
Lt trlr st/trn fuse 10a
Lt turn fuse 10a
Lt turn sig
Lt turn sig volt
Nca
Passenger outside rearview mirror
Red
Right i/p fuse block
Right roof r marker lamp
Right turn ind
Rr lamp volt
Rt door lmp gnd
Rt door lmp pwr
Rt trlr st/trn fuse 10a
Rt turn fuse 10a
Rt turn sig
Rt turn sig volt
S200 (in roof marker harness)
S201 (in roof marker harness)
S202
S205
S207
Serial data
Stoplamp sw
Tan
Turn ind
Turn signal/flasher module
Under- hood fuse block
Veh chmsl fuse 10a
Veh stop fuse 15a

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 5) for GMC Sierra 2003 1500

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List of elements for Ground Distribution Wiring Diagram (1 of 5) for GMC Sierra 2003 1500:

(5.3l flex fuel)
(in forward lamp harness)
5.3l flex fuel
A/c compressor clutch
A/c low pressure switch
Active & elect shift transfer case
Active & manual shift transfer case
Auxiliary battery relay
Battery (left)
Battery (right)
Brake fluid level switch
Brake pressure differential switch
C1 a
C3 a
Coolant level switch
Daytime running lamp (drl) (left)
Daytime running lamp (drl) (right)
Diesel
Dual tanks
Electronic brake control module
Except 4.3l base
F/pmp relay
Fog lamp (left)
Fog lamp (right)
Front axle actuator
Fuel composition sensor
Fuel pump
Fuel pump & sender assembly (secondary)
G100 (lower left of radiator core support)
G101
G104 (left rear of engine block)
G105 (lower right front of eng block)
G106 (right front of engine block)
G107
G110 (left front body mount)
G304 (under left front seat)
Gas
Gas exc 4.3l
Gas w/aux battery
High beam headlamp (left)
High beam headlamp (right)
Horn (left)
Horn (right)
Ign 1 relay (gas)
Inflatable restraint passenger presense module
Inflatable restraint sensing & diagnostic module
Low beam headlamp (left)
Low beam headlamp (right)
Manual shift transfer case
Nca
Park/turn signal lamp (left front)
Park/turn signal lamp (right front)
Rear wheel steering control module
Roof beacon relay
S102 (in engine harness)
S107
Throttle actuator control module
Transfer case shift control motor
Transfer case shift control switch
Underhood fuse block (left side of engine compt, near battery)
W/ dual horns
W/aux battery
W/pto
Washer fluid level sensor
Windshield washer fluid pump

Ground Distribution Wiring Diagram (2 of 5) for GMC Sierra 2003 1500

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List of elements for Ground Distribution Wiring Diagram (2 of 5) for GMC Sierra 2003 1500:

Avalanche/ escalade ext
C1 a
C1 e
C2 a
C2 d
Center high mount stop lamp
Door courtesy lamp (left rear)
Door courtesy lamp (right rear)
Electronic suspension control module
Engine oil level switch
Escalade ext
Exc 8.1l w/o calif lev
Exc escalade ext
G102 (left side of engine block)
G103 (right rear of engine block)
G305 (left "b" pillar)
G306 (on right "b" pillar)
Heated seat element (left rear)
Heated seat element (right rear)
Heated seat module (left rear)
Heated seat module (right rear)
Ignition coil 1
Ignition coil 2
Ignition coil 3
Ignition coil 4
Ignition coil 5
Ignition coil 6
Ignition coil 7
Ignition coil 8
Intake air temperature (iat)/mass airflow (maf) sensor
Memory seat module
Memory seat module (passenger)
Mini wedge (door jamb switch) (left rear)
Mini wedge (door jamb switch) (right rear)
Nca
Park/ neutral position switch
Powertrain control module
Rear object sensor control module
Rear parking assist diagnostic connector
Rear window defogger grid
Roof beacon relay
S103 (in engine harness)
S104 (in engine harness)
S110 (in engine harness)
S156 (in engine harness)
S157 (in right engine ignition coil jumper harness)
S319 (in body harness)
S332
S389 (right rear heated seat harness)
S710 (left rear door harn)
S810 (right rear door harn)
Window contactor
Window switch (right rear)
Window switch) (left rear)

Ground Distribution Wiring Diagram (3 of 5) for GMC Sierra 2003 1500

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List of elements for Ground Distribution Wiring Diagram (3 of 5) for GMC Sierra 2003 1500:

(not used)
A/t shift lock solenoid
A12
Air temperature sensor assembly (inside front)
Air temperature sensor assembly (inside rear)
Analog clock
Auto a/c
Auto a/c exc avalanche/ escalade ext
Auxiliary power outlet (bin)
Auxiliary power outlet (console)
Auxiliary power outlet (front)
Blower motor
Blower motor resistor assembly
Bose exc luxury
C1 4a
C1 6c
C1 a
C1 b9
C1 d9
C1 f6
C2 f
C3 c
C3 d
C4 a
C5 e
C7 f
C8 f
C9 a
Cad
Center high mounted stop lamp
Cigar lighter
Clearance lamps
Clearance switch
Courtesy lamp ("b" pillar)
Courtesy lamp (right)
Data link connector
Dome lamp (front)
Dome reading lamp (rear)
Driver door module
Exc cad ext
Front passenger door module
G200 (behind right side of dash, near right "a" pillar)
Headlamp switch
Heated seat switch (left rear)
Heated seat switch (right rear)
Hvac control assembly (front auxiliary)
Hvac control module
I/p compartment lamp
I/p courtesy lamp (left)
I/p relay block (below left side of dash, left of steering column)
Inside rearview mirror
Instrument panel cluster
Left i/p fuse block (lower left side of dash)
Lock relay
Luxury
Man a/c
Overhead console
Reading lamp (rear)
Rear wheel steering switch
Recirculation actuator
Right i/p fuse block (lower right side of dash)
Roof beacon switch
Roof marker lamp (left)
Roof marker lamp (right)
S202
S205
S207 (in headliner harness)
S352
Sunroof motor
Sunroof relay
Transfer case shift control switch
Underhood lamp
Unlock relay
Visor lamp (left)
Visor lamp (right)
Windshield wiper motor module

Ground Distribution Wiring Diagram (4 of 5) for GMC Sierra 2003 1500

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List of elements for Ground Distribution Wiring Diagram (4 of 5) for GMC Sierra 2003 1500:

(not used)
A12
Audio amplifier
B12
Body control module
C1 2c
C1 a8
C1 b5
C1 c5
C1 d10
C2 a
C2 b6
C3 b6
Column shift
Data link connector
Digital radio receiver
Exc luxury
G203 (near left "a" pillar)
Hazard lamps switch
Headlamp switch
Hvac control module
I/p relay block (below left side of dash, left of steering column
Ignition key alarm switch
Inflatable restraint steering wheel module coil
Instrument panel cluster
Left i/p fuse block (lower left side of dash)
Luxury
Multifunction accessory switch
Nca
Radio
Rear parking assist disable switch
Rear seat audio controller
Rear seat entertainment assembly
Remote playback device (cd player)
Right i/p fuse block (lower right side of dash)
S213 (in i/p harness)
S216 (in steering column harn)
S217 (in steering column harn)
S330
S333 (in console harness)
Steering wheel dic controls
Steering wheel speed/ position sensor
Tan
Theft deterrent control module
Tow/haul switch
Traction control switch
Transfer case shift control module
Transmission shift select switch
Turn signal hazard flasher module
Turn signal/ multifunction switch
Vehicle communication interface module
Windshield wiper/washer switch

Ground Distribution Wiring Diagram (5 of 5) for GMC Sierra 2003 1500

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List of elements for Ground Distribution Wiring Diagram (5 of 5) for GMC Sierra 2003 1500:

(not used)
Air temperature actuator
Auto a/c
Automatic level control compressor
Auxiliary power outlet (rear)
Backup lamp (left)
Backup lamp (right)
Blower motor (auxiliary)
Blower motor (rear auxiliary)
Cargo door key switch
Center high mount control stop lamp
Clearance lamp (left front)
Clearance lamp (left rear)
Clearance lamp (right rear)
Dome lamp ("d" pillar)
Door ajar switch (cargo)
Door contact plate (left cargo body)
Door contact plate (left cargo door)
Door contact plate (right cargo body)
Door contact plate (right cargo door)
E c1
Electronic suspension control module
Escalade
Exc avalance/ escalade ext
Four wheel steering
G401 (left rear body mount)
G410 (behind right rear quarterpanel)
Hvac control assembly (rear auxiliary)
Id lamp
Lamp (right front)
License lamp (left)
License lamp (right)
Liftgate ajar switch
Liftgate ajar switch (left)
Liftgate ajar switch (right)
Liftgate key switch
Mode actuator (rear)
Rear a/c w/aux heater
Rear a/c w/o aux heater
Rear lamps junction block (inside of left rear frame rail)
Rear object sensor control module
Rear parking assist diagnostic connector
Rear window defogger grid
Rear window defogger grid (left cargo)
Rear window defogger grid (right cargo)
S901 (in liftgate harness)
S913
S914
Splice pack sp410 (behind right quarterpanel)
Splice pack sp410a (behing right rear quarter- panel)
Stop/turn signal lamp (right)
Stop/turn signal lamp) (left)
Suburban
Tail/stop lamp (left)
Tail/stop lamp (right)
Trailer connector
W/ cargo doors
W/cargo doors
W/liftgate
Wiper module (rear)

HEADLIGHTS

Headlights Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Headlights Wiring Diagram for GMC Sierra 2003 1500:

(w/ cj2)
(w/ t89)
(w/o cj2)
(w/o t89)
A12
Ambient light sensor (on top center of dash)
Ambient lt sens
Anl/drl defeat
Auto
Body control module (bcm) (on lower left side of dash, below steering column)
Drl fuse 10a
Drl relay
Drl rly ctrl
Drl sw sig
Flash to pass
Fog lamp switch
Fog lp fuse 15a
Fog lp relay
Fog lp rly ctrl
Fog lp sw sig
G100 (on lower left radiator core support)
G104 (left rear of engine block)
G203 (near left "a" pillar)
Hdlp dim sw sig
Hdlp hi bm relay
Hdlp lo bm relay
Head
Headlamp switch
Hi bm rly ctrl
Hi hdlp lt fuse 10a
Hi hdlp rt fuse 10a
Hi/lo beam select
Hlps on sig
Hot at all times
I/p relay block (below left of dash, left of steering column)
Interior lights system
Left daytime running lamp
Left front fog lamp
Left high beam head- lamp
Left low beam head- lamp
Lo bm rly ctrl
Lo hdlp lt fuse 10a
Lo hdlp rt fuse 10a
Low ref
Multifunction accessory switch
Park
Park brake switch (part of park brake assembly)
Pk brake sig
Right daytime running lamp
Right front fog lamp
Right high beam head- lamp
Right low beam head- lamp
S100
S101
S107
S213
Turn signal malfunction switch
Underhood fuse block (left side of engine compt)

HORN

Horn Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Horn Wiring Diagram for GMC Sierra 2003 1500:

(left side of engine compartment)
C2 body control module (in center console)
G100 (left radiator support bracket)
Horn fuse 15a
Horn relay
Horn switch
Hot at all times
Left horn (left side of radiator support)
Right horn (right side of radiator support)
S101
S10o
Underhood fuse block

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram (1 of 2) for GMC Sierra 2003 1500

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List of elements for Instrument Cluster Wiring Diagram (1 of 2) for GMC Sierra 2003 1500:

(diesel only)
4wd ind
A10
A11
A12
Abs ind
Air bag ind
B10
B11
B12
Batt
Battery ind
Body control module (bcm) (on lower left side of dash, below steering column)
Brake ind
C1 lamp
Class 2 data
Computer data lines
Coolant temp gauge
Coolant temp ind
Cruise ind
Dic fuel sig
Dic mode sw
Dic sw sig
Dic toggle sw
Eng speed sig
Except seo
Exterior lights system
Fuel gauge
G100 (on lower left of radiator core support)
G200 (behind right side of dash, near right "a" pillar)
G203 (behind left side of dash, near left "a" pillar)
Ground
High beam ind
Hot at all times
Hot in run or start
Hour meter
I/p dim
I/p relay block (below left side of dash)
Ign e fuse 10a
Ignition
Illumination
Ingnition
Instrument panel cluster
Ipc serial data
Ipc/dic fuse 10a
Left turn
Left turn ind
Lo washer fluid
Low fuel ind
Message display
Mil cntrl
Nca
Odometer
Oil gauge
Oil pressure ind
Orn
Pnk
Prnd321
Red
Reset
Right turn
Right turn ind
S100
S202
Sba sig
Seat belt ind
Seo
Seo b1 fuse 15a
Seo ign fuse 10a
Service engine soon ind (mil)
Speedometer
Tachometer
Temp ind transmission
Tow/haul ind
Transmission shift select switch
Transmission temp gauge
Trip
Underhood fuse block (left side of engine compt)
Variable dimming
Volts gauge
Vss
Wait to start ind (diesel only)
Washer fluid level sensor (in washer fluid reservoir)

Instrument Cluster Wiring Diagram (2 of 2) for GMC Sierra 2003 1500

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List of elements for Instrument Cluster Wiring Diagram (2 of 2) for GMC Sierra 2003 1500:

(diesel only)
(left rear of engine compt)
5 volt ref
5.3l flex fuel
A10
C10
Class 2 data
Computer data lines
Coolant level switch (in coolant reservoir)
Coolnt lev sig
Cruise control module (ccm) (gas only, w/ auto cruise control)
Diesel
Eng speed sig
Engine controls system
Engine oil level switch (on right side of oil pan)
Engine oil pressure sensor (on top rear of engine)
Except 5.3l flex fuel
Fuel
Fuel lev sens
Fuel pump & sender assembly (primary) (gas) (inside fuel tank) fuel level sensor (primary) (diesel) (inside fuel tank)
Fuel pump & sender assembly (secondary) (gas) (inside fuel tank) fuel level sensor (secondary) (diesel) (inside fuel tank)
G103 (on right rear of engine block)
G104 (on left rear of engine block)
G108
G203 (behind left side of dash, near left "a" pillar)
Gas
I/p relay block
I/p relay block (below c1 left side of dash)
Inflatable restraint steering wheel module coil
Low ref
Mil ctrl
Nca
Oil lev sw
Oil pres sig
Person- alization
Powertrain control module (pcm) (gas) (on left front of engine compt) engine control module (ecm) (diesel)
Radio (w/ luxury package)
Rear object sensor control module (gas only, if equipped)
Rear wheel steering control module (w/ 4 wheel steering) (at left rear of vehicle, near spare tire bracket)
S102
S103
S216
S312
Select
Steering wheel dic controls
Trip
Vss
W/ dual tank
W/o dual tank
Wait to start

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram (1 of 3) for GMC Sierra 2003 1500

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List of elements for Courtesy Lamps Wiring Diagram (1 of 3) for GMC Sierra 2003 1500:

A11
B12
Body control module (lower left side of dash, below steering column)
C3 a6
Cargo lamp low ctrl
Class 2 data
Class 2 serial data
Convenience package comfort and decor level #3
Crew cab only
Crew cab w/ ye9
Ctsy lamp ctrl
Ctsy lamp on sig
Ctsy lamp power
Dome lamp switch
Door ajar sig
Driver door latch assembly
Driver door module (ddm) (in left front door)
F tan
G305 (left "b" pillar)
G306 (on right "b" pillar)
Headlamp switch
Int lamp defeat sig
Int lamp defeat sw
Left front door courtesy lamp
Left rear door courtesy lamp (2003)
Left rear door latch assembly
Lf door ajar sig
Low ref
Lr door ajar sig
Merchandised package luxury edition
Rear dome lamp
Rf door ajar sig
Right rear door courtesy lamp (2003)
Right rear door latch assembly
Rr door ajar sig
Sp205 (left side of dash)
Tan
W/ ye9 or w/ y91
W/o ye9
Y91 =
Ye9 =

Courtesy Lamps Wiring Diagram (2 of 3) for GMC Sierra 2003 1500

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List of elements for Courtesy Lamps Wiring Diagram (2 of 3) for GMC Sierra 2003 1500:

(in headliner harness between overhead console reading lamps and i/p
Cargo lamp
Convenience package comfort and decor level 3
Crew cab w/ ye9
Dome
Except crew cab w/ ye9
Left vanity mirror lamp
Map lamps
Merchandised package luxury edition
Overhead console
Reading
Rear courtesy reading lamps (crew cab w/ ye9)
Relay block)
Right vanity mirror lamp
S321
S345
Tan
W/ y91 and crew cab w/ ye9
W/ ye9 and crew cab w/o ye9
W/ ye9 except crew cab
Y91 =
Ye9 =

Courtesy Lamps Wiring Diagram (3 of 3) for GMC Sierra 2003 1500

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List of elements for Courtesy Lamps Wiring Diagram (3 of 3) for GMC Sierra 2003 1500:

(2003)
A12
B10
Bin lamp
C10
C11
Cargo lamp switch
Class 2 data
Convenience package comfort and decor level #3
Ctsy lamp control
Ctsy lamp power
Door ajar sig
Front passenger door courtesy light
Front passenger door latch assembly
Front passenger door module (fpdm) (in right front door)
G200 (behind right side of dash, near right "a" pillar)
G203 (near left "a" pillar)
I/p compartment lamp
I/p relay block (below left side of dash, left of steering column)
Left i/p courtesy lamp
Left i/p fuse block (under left side of dash)
Low ref
Merchandised package luxury edition
Right i/p courtesy lamp (2003)
Right i/p fuse block (lower right side of dash)
S202
S205
S213
Tan
W/ ye9 or w/ y91
W/o ye9
Y91 =
Ye9 =

Instrument Illumination Wiring Diagram (1 of 3) for GMC Sierra 2003 1500

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List of elements for Instrument Illumination Wiring Diagram (1 of 3) for GMC Sierra 2003 1500:

2 hi ind
2 hi ind control
4 hi ind
4 hi ind control
4 lo ind
4 lo ind control
5 volt ref
A11
A12
Auto 4wd ind
B pnk
B11
Body control module (lower left side of dash, below steering column)
Crew cab only
Diff lock ind control
Dimming input
Dimming return
Drl off
Drl off ind ctrl
Fog lamp rly ctrl
G305 (left "b" pillar)
G306 (right "b" pillar)
Headlamp on
Headlamp on ind ctrl
Headlamp switch
Instrument panel cluster
Instrument panel dimming
Left rear window switch
Np1 = transfer case, electric shift control, 2 speed np8 = transfer case active, 2 speed pushbutton control
Pnk
Red
Right rear window switch
S212
Transfer case shift control module (behind headlamp switch)
Transfer case shift control switch
W/ np1
W/ np8

Instrument Illumination Wiring Diagram (2 of 3) for GMC Sierra 2003 1500

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List of elements for Instrument Illumination Wiring Diagram (2 of 3) for GMC Sierra 2003 1500:

(left rear of vehicle, near spare tire bracket)
(near left "a" pillar)
2ws ind
2ws ind control
4ws ind
4ws ind control
Control
Fog lamp circuit
G203
Hvac control module
Inflatable restraint i/p module disable switch
Inflatable restraint steering wheel module coil
Lower left
Lower right
Multifunction accessory switch
Nca
Overhead console
Power take off (pto) switch
Rear wheel steering control module
Rear wheel steering mode select switch
Remote playback device-cd player
S205
Steering wheel
Tan
Tow ind
Tow mode ind
Traction control switch
Transfer case shift control switch
Underhood fuse block (left side of engine compt, near battery)
Upper left
Upper right

Instrument Illumination Wiring Diagram (3 of 3) for GMC Sierra 2003 1500

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List of elements for Instrument Illumination Wiring Diagram (3 of 3) for GMC Sierra 2003 1500:

(lower left side of dash)
A11
C10
Driver window/door lock switch
Electronic suspension system
Exterior lamps
Firm indicator
Fog lamp
Front passenger window/door lock switch
G100 (lower left side of radiator core support)
G200 (behind right side of dash, near right "a" pillar)
G203 (near left "a" pillar)
Headlamp leveling switch
I/p relay block (below left side of dash, left of steering column)
Left i/p fuse block
Multifunction accessory switch
Right i/p fuse block (lower left side of dash)
Roof beacon switch
S101
S202
S345
Selectable ride switch
W/ t89
W/ t96

MEMORY SYSTEMS

Memory Systems Wiring Diagram (1 of 2) for GMC Sierra 2003 1500

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List of elements for Memory Systems Wiring Diagram (1 of 2) for GMC Sierra 2003 1500:

(in driver seat harn)
(not used)
5 volt ref
Batt (+)
C (not used)
C10 h
Class 2 serial data
Computer data lines system
Driver seat adjuster switch
Frt dwn
Frt up
Frt vert dn sw sig
Frt vert mtr dn ctrl
Frt vert mtr pos sen
Frt vert mtr up ctrl
Frt vert up sw sig
Fwd
G305 (on left "b" pillar)
Gnd
Heated seat cus pwr
Heated seat temp sig
Horiz fwd sw sig
Horiz mtr fwd ctrl
Horiz mtr pos sen sig
Horiz mtr rwd ctrl
Horiz rwd sw sig
Hot at all times
Htd seat back ctrl
Htd seat back pwr
Htd seat cus ctrl
Htd seat cus pwr
I/p relay block (near left kick panel)
Low ref
Lum horiz pos sen sig
Lum mtr fwd ctrl
Lum mtr rwd ctrl
Lum mtr rwd ctrl lum mtr rwd ctrl
Memory seat module (under left front seat)
Pnk
Pnk pnk
Rear vert dn sw sig
Rear vert mtr pos sens
Rear vert up sw sig
Rec fwd
Rec rwd
Recline fwd sw sig
Recline mtr fwd ctrl
Recline mtr pos sen sig
Recline mtr rwd ctrl
Recline rwd sw sig
Rr dwn
Rr up
Rr vert mtr dn ctrl
Rr vert mtr up ctrl
Rwd
S311
S314
S315 (in driver seat harn)
Seat circuit breaker 30a
Seats system (heated seats circuit)
Tan
Torso blstr in sw sig
Torso blstr out sw sig
Torso bolster in ctrl
Torso bolster out ctrl
Trso blstr pos sens sig

Memory Systems Wiring Diagram (2 of 2) for GMC Sierra 2003 1500

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List of elements for Memory Systems Wiring Diagram (2 of 2) for GMC Sierra 2003 1500:

(in driver seat harn) s309
(in driver seat harn) s310
A red
Batt (+)
C (not used)
Class 2 serial data
Computer data lines system
Driver door module (in driver's door)
Driver seat bolster motor
Driver seat bolster motor position sensor
Driver seat bolster/ lumbar switch
Driver seat front vertical motor
Driver seat front vertical position sensor
Driver seat horiz- ontal position sensor
Driver seat lumbar motor
Driver seat lumbar motor position sensor
Driver seat rear vertical motor
Driver seat rear vertical position sensor
Driver seat recliner motor
Driver seat recliner motor position sensor
Exit
Mem 1 sw sig
Mem 2 sw sig
Memory/ heated seat switch
Out
Pnk
Red
Set
Tan

POWER DISTRIBUTION

4.3L VIN X

4.3L VIN X, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra 2003 1500

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List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra 2003 1500:

(base) (exc base)
(not used)
125a
40a
4ws fuse 15a
5.3l w/dual batteries
A c7
A12
Abs fuse 60a
Audio amplifier
Auxiliary battery relay (right rear of eng compt)
B c3
B c7
B c9
B11 c1
B12 c1
B2 c3
Battery (left)
Battery (right)
Battery (right) (w/aux battery)
Battery fuse 125a
Body control module
C9 d
Cig ltr fuse 15a
Cigar lighter
D2 c1
Data link connector
Digital radio receiver
E10
Eap fuse 15a
Electronic brake control module
Emergency vehicle roof lamp relay
Evaporative emissions canister vent solenoid
Except luxury
F2 c1
Fuse holder
Fuse holder (w/qs4)
Fusible link
G104 (left rear of eng block)
G200 (behind right side of dash, near "a" pillar)
Generator
I/p relay block (left of steering column)
Ign a fuse 40a
Ign b fuse 40a
Luxury
Megafuse
Nca
Radio
Radio amp fuse 30a
Radio fuse 15a
Rear seat audio (rsa) controller
Rear wheel steering control module
Red
Rr wiper fuse 25a
Rtd fuse 30a
S102
S205 s303
Starter
Starter relay
Stud 1 fuse 40a
Stud 2 fuse 30a
Sunroof fuse 25a
Tbc batt fuse 10a
To 4wd fuse (diagram 5 of 6)
To ignition switch (diagram 5 of 6)
To ignition switch (diagram 6 of 6)
To ipc/dic fuse (diagram 2 of 6)
Trailer connector
Underhood fuse block (left side of engine compt, near battery)
Underhood junction block
Upfitter battery junction block
Vses/ ecas fuse 60a
W/ vses
W/aux battery
W/o vses

4.3L VIN X, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra 2003 1500

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List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra 2003 1500:

(cj2) (exc cj2)
(not used)
A c8
A g
A10
Accessory power outlet
Aux pwr fuse 20a
Auxiliary power outlet (bin)
Auxiliary power outlet (console)
Auxiliary power outlet (front)
B c3
B c5
B11
B11 c1
Battery monitor
Blower fuse 40a
Blower motor resistor assembly
C1 c2
C1 f12
C10
C4 e6
C5 c1
D c4
D12
Defog relay
E11 c1
Exc seo
Except luxury
F c8
F/pmp relay
From sunroof fuse (diagram 1 of 6)
G200 (near right 'a" pillar)
G203 (near left "a" pillar)
Garage door opener
Hvac control module
Hvac/ecas fuse 10a
I/p relay block (left of steering column)
In i/p harness) s335
Info fuse 15a
Instrument panel cluster
Ipc/dic fuse 10a
Lh hid fuse 20a
Luxury
Overhead console
Pcm b fuse 20a
Powertrain control module
Rear seat entertainment assembly
Red
Remote playback device (cd player)
Rh hid fuse 20a
Right i/p fuse block (lower right side of dash)
Roof beacon relay
Roof beacon switch
Rr defog fuse 30a
Rr hvac fuse 30a
S336
S338
Seo
Seo b1 fuse 15a
Seo b2 fuse 30a
Stop lp fuse 25a
Stoplamp switch
To lbec 1 fuse (diagram 3 of 6)
Transfer case encoder motor
Transfer case shift control module
Transmission control module
Trec fuse 30a
Underhood fuse block (left side of engine compt, near battery)
Vehicle communication interface module
W/ thermo console
W/o thermo console

4.3L VIN X, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra 2003 1500

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List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra 2003 1500:

(below left side of dash, left of steering column) i/p relay block
(left side of engine compt, near battery) underhood fuse block
(lower left side of dash)
(not used)
(passenger seat harness)
A c5
A c6
A/c comp fuse 10a
A/c comp relay
A10 c1
A12
A7 c1
Aux pwr 2 fuse 20a
B c7
B10
B12
B7 c2
Body control module
C c3
C9 c1
Ddm fuse 15a
Driver door module
Driver door unlock relay
Drl fuse 10a
Drl relay
E c10
E c7
E10
E11 c1
E12
E3 c3
Ecc fuse 10a
Etc/ecm fuse 15a
Evaporative emissions (evap) canister purge solenoid
Exc base
F c3
F1 c1
Flash fuse 25a
Fog lp fuse 15a
Fog lp relay
From mbec 1 fuse (diagram 3 of 6)
From pcm b fuse (diagram 2 of 6)
Front passenger door module
Fuel composition sensor
Fuel pump (fp) relay (secondary)
G c4
G104 (on left rear of engine block)
Hdlp-hi relay
Hdlp-low relay
Horn relay
Ign 1 relay
Intake air temperature (iat)/mass airflow (maf) sensor assembly
Lbec 1 fuse 50a
Lbec 2 fuse 50a
Left i/p fuse block
Lock relay
Locks fuse 20a
Lt doors circuit breaker 25a
Lumbar bolster switch (front passenger)
M c4
Mbec 1 fuse 50a
Memory seat module
Park lp relay
Pcm 1 fuse 15a
Pdm fuse 15a
Pnk
Powertrain control module
Red
Right i/p fuse block (lower right side of dash)
Rt door circuit breaker 25a
S102
S328
Sba fuse 15a
Seat adjuster switch (driver)
Seat adjuster switch (front passenger)
Seat circuit breaker 30a
Tbc 2a fuse 15a
Tbc 2b fuse 15a
Tbc 2c fuse 15a
Throttle actuator control module (8.1l)
To ign 1 relay (diagram 3 of 6)
To inj 1 fuse (diagram 4 of 6)
To seo ign fuse (diagram 6 of 6)
Turn signal/ hazard flasher module
Unlock relay
W/s wash fuse 15a
W/s wash relay
Window switch (left rear) (crew cab)
Window switch (right rear)

4.3L VIN X, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra 2003 1500

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List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra 2003 1500:

(4.3l)
(4.8l, 5.3, 6.0l)
(exc 4.3l)
(left side of engine, compt, near battery) underhood fuse block
(not used)
4.3l
4.3l, 4.8l, 5.3l, 6.0l
4.8l, 5.3, 6.0l
4.8l, 5.3l, 6.0l, 8.1l
8.1l
C10
D10
E10
From pcm 1 fuse (diagram 3 of 6)
Fuel injector 1
Fuel injector 2
Fuel injector 3
Fuel injector 4
Fuel injector 5
Fuel injector 6
Fuel injector 7
Fuel injector 8
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
Inj 1 fuse 15a
Inj 2 fuse 15a
Pnk
Pnk a
S152 (left engine ignition coil jumper harn)
S153 (right engine ignition coil jumper harn)
S154 (right engine ignition coil jumper harn)
S155

4.3L VIN X, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra 2003 1500

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List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra 2003 1500:

(30 series) (10/20 series)
(behind lower left side of dash) left i/p fuse block
(not used)
(steering column harness) s240
4wd fuse 15a
Acc
Air temperature actuator (left)
Air temperature actuator (right)
Automatic transmission
B10 a1
Body control module
Brake fuse 10a
C1 c9
C1 d12
C1 e8
C175
C2 c2
C4 b
C4 c
Clutch start switch
Crank fuse 10a
Cruise
Cruise control module
Cruise control on/off switch
Cruise fuse 10a
E11
Electronic brake control module
Exc m74 transmission
F10
From auxiliary battery relay (diagram 1 of 6)
From ign a fuse (diagram 1 of 6)
Front axle actuator
Htr/ac fuse 30a
Hvac 1 fuse 10a
Hvac control module
Ign 0 fuse 10a
Ign 3 fuse 10a
Ignition switch
Lock
Mode actuator
Off
Pnk
Power takeoff (pto) switch
Powertrain control module
Pto
Rear wheel steering control module
Recirculation actuator
Red
Right i/p fuse block (lower right side of dash)
Run
Start
Steering wheel speed/ position sensor
Stoplamp switch
Tbc ign 0 fuse 10a
Theft deterrent control module
Tranmission control module
Transfer case shift control switch
Turn signal multifunction switch
Underhood fuse block (left side of engine compt, near battery)

4.3L VIN X, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra 2003 1500

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List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra 2003 1500:

(left side of engine compt, near battery) underhood fuse block
(not used)
A/c comp relay
Acc
Auxiliary power outlet
B/u lp fuse 20a
Body control module
C c8
C1 b2
C10
C8 d8
Clutch start switch (m/t)
D c5
D10 c1
Defog relay
E c3
Exc 8.l w/o california lev
Exc seo
F11
F8 c2
From ign 1 relay (diagram 3 of 6)
From ign b fuse (diagram 1 of 6)
G203 (behind left side of dash, near left "a" pillar)
Heated oxygen sensor bank 1 sensor 1
Heated oxygen sensor bank 1 sensor 2
Heated oxygen sensor bank 2 sensor 1
Heated oxygen sensor bank 2 sensor 2
I/p relay block (left of steering column)
Ign e fuse 10a
Ignition switch
Inflatable restraint i/p module disable switch
Inflatable restraint passenger presence module
Inflatable restraint sensing & diagnostic module
Inside rearview mirror
Instrument panel cluster
Left i/p fuse block (behind lower left side of dash)
Lock
Nca
O2a fuse 15a
O2b fuse 15a
Off
Park/neutral position switch (a/t)
Pnk
Rr wpr fuse 15a
Run
S337
S338
Selectable ride switch
Seo
Seo accy fuse 10a
Seo ign fuse 10a
Sir fuse 15a
Start
Tbc accy fuse 10a
Tbc ign 1 fuse 10a
Thermo cupholder assembly
Turn signal/ multifunction switch
Upfitter battery junction block
W/ thermo console
W/o thermo console
Windshield wiper motor module
Ws wpr fuse 25a

4.8L VIN V

4.8L VIN V, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra 2003 1500

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List of elements for 4.8L VIN V, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra 2003 1500:

(base) (exc base)
(not used)
125a
40a
4ws fuse 15a
5.3l w/dual batteries
A c7
A12
Abs fuse 60a
Audio amplifier
Auxiliary battery relay (right rear of eng compt)
B c3
B c7
B c9
B11 c1
B12 c1
B2 c3
Battery (left)
Battery (right)
Battery (right) (w/aux battery)
Battery fuse 125a
Body control module
C9 d
Cig ltr fuse 15a
Cigar lighter
D2 c1
Data link connector
Digital radio receiver
E10
Eap fuse 15a
Electronic brake control module
Emergency vehicle roof lamp relay
Evaporative emissions canister vent solenoid
Except luxury
F2 c1
Fuse holder
Fuse holder (w/qs4)
Fusible link
G104 (left rear of eng block)
G200 (behind right side of dash, near "a" pillar)
Generator
I/p relay block (left of steering column)
Ign a fuse 40a
Ign b fuse 40a
Luxury
Megafuse
Nca
Radio
Radio amp fuse 30a
Radio fuse 15a
Rear seat audio (rsa) controller
Rear wheel steering control module
Red
Rr wiper fuse 25a
Rtd fuse 30a
S102
S205 s303
Starter
Starter relay
Stud 1 fuse 40a
Stud 2 fuse 30a
Sunroof fuse 25a
Tbc batt fuse 10a
To 4wd fuse (diagram 5 of 6)
To ignition switch (diagram 5 of 6)
To ignition switch (diagram 6 of 6)
To ipc/dic fuse (diagram 2 of 6)
Trailer connector
Underhood fuse block (left side of engine compt, near battery)
Underhood junction block
Upfitter battery junction block
Vses/ ecas fuse 60a
W/ vses
W/aux battery
W/o vses

4.8L VIN V, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra 2003 1500

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List of elements for 4.8L VIN V, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra 2003 1500:

(cj2) (exc cj2)
(not used)
A c8
A g
A10
Accessory power outlet
Aux pwr fuse 20a
Auxiliary power outlet (bin)
Auxiliary power outlet (console)
Auxiliary power outlet (front)
B c3
B c5
B11
B11 c1
Battery monitor
Blower fuse 40a
Blower motor resistor assembly
C1 c2
C1 f12
C10
C4 e6
C5 c1
D c4
D12
Defog relay
E11 c1
Exc seo
Except luxury
F c8
F/pmp relay
From sunroof fuse (diagram 1 of 6)
G200 (near right 'a" pillar)
G203 (near left "a" pillar)
Garage door opener
Hvac control module
Hvac/ecas fuse 10a
I/p relay block (left of steering column)
In i/p harness) s335
Info fuse 15a
Instrument panel cluster
Ipc/dic fuse 10a
Lh hid fuse 20a
Luxury
Overhead console
Pcm b fuse 20a
Powertrain control module
Rear seat entertainment assembly
Red
Remote playback device (cd player)
Rh hid fuse 20a
Right i/p fuse block (lower right side of dash)
Roof beacon relay
Roof beacon switch
Rr defog fuse 30a
Rr hvac fuse 30a
S336
S338
Seo
Seo b1 fuse 15a
Seo b2 fuse 30a
Stop lp fuse 25a
Stoplamp switch
To lbec 1 fuse (diagram 3 of 6)
Transfer case encoder motor
Transfer case shift control module
Transmission control module
Trec fuse 30a
Underhood fuse block (left side of engine compt, near battery)
Vehicle communication interface module
W/ thermo console
W/o thermo console

4.8L VIN V, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra 2003 1500

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List of elements for 4.8L VIN V, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra 2003 1500:

(below left side of dash, left of steering column) i/p relay block
(left side of engine compt, near battery) underhood fuse block
(lower left side of dash)
(not used)
(passenger seat harness)
A c5
A c6
A/c comp fuse 10a
A/c comp relay
A10 c1
A12
A7 c1
Aux pwr 2 fuse 20a
B c7
B10
B12
B7 c2
Body control module
C c3
C9 c1
Ddm fuse 15a
Driver door module
Driver door unlock relay
Drl fuse 10a
Drl relay
E c10
E c7
E10
E11 c1
E12
E3 c3
Ecc fuse 10a
Etc/ecm fuse 15a
Evaporative emissions (evap) canister purge solenoid
Exc base
F c3
F1 c1
Flash fuse 25a
Fog lp fuse 15a
Fog lp relay
From mbec 1 fuse (diagram 3 of 6)
From pcm b fuse (diagram 2 of 6)
Front passenger door module
Fuel composition sensor
Fuel pump (fp) relay (secondary)
G c4
G104 (on left rear of engine block)
Hdlp-hi relay
Hdlp-low relay
Horn relay
Ign 1 relay
Intake air temperature (iat)/mass airflow (maf) sensor assembly
Lbec 1 fuse 50a
Lbec 2 fuse 50a
Left i/p fuse block
Lock relay
Locks fuse 20a
Lt doors circuit breaker 25a
Lumbar bolster switch (front passenger)
M c4
Mbec 1 fuse 50a
Memory seat module
Park lp relay
Pcm 1 fuse 15a
Pdm fuse 15a
Pnk
Powertrain control module
Red
Right i/p fuse block (lower right side of dash)
Rt door circuit breaker 25a
S102
S328
Sba fuse 15a
Seat adjuster switch (driver)
Seat adjuster switch (front passenger)
Seat circuit breaker 30a
Tbc 2a fuse 15a
Tbc 2b fuse 15a
Tbc 2c fuse 15a
Throttle actuator control module (8.1l)
To ign 1 relay (diagram 3 of 6)
To inj 1 fuse (diagram 4 of 6)
To seo ign fuse (diagram 6 of 6)
Turn signal/ hazard flasher module
Unlock relay
W/s wash fuse 15a
W/s wash relay
Window switch (left rear) (crew cab)
Window switch (right rear)

4.8L VIN V, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra 2003 1500

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List of elements for 4.8L VIN V, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra 2003 1500:

(4.3l)
(4.8l, 5.3, 6.0l)
(exc 4.3l)
(left side of engine, compt, near battery) underhood fuse block
(not used)
4.3l
4.3l, 4.8l, 5.3l, 6.0l
4.8l, 5.3, 6.0l
4.8l, 5.3l, 6.0l, 8.1l
8.1l
C10
D10
E10
From pcm 1 fuse (diagram 3 of 6)
Fuel injector 1
Fuel injector 2
Fuel injector 3
Fuel injector 4
Fuel injector 5
Fuel injector 6
Fuel injector 7
Fuel injector 8
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
Inj 1 fuse 15a
Inj 2 fuse 15a
Pnk
Pnk a
S152 (left engine ignition coil jumper harn)
S153 (right engine ignition coil jumper harn)
S154 (right engine ignition coil jumper harn)
S155

4.8L VIN V, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra 2003 1500

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List of elements for 4.8L VIN V, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra 2003 1500:

(30 series) (10/20 series)
(behind lower left side of dash) left i/p fuse block
(not used)
(steering column harness) s240
4wd fuse 15a
Acc
Air temperature actuator (left)
Air temperature actuator (right)
Automatic transmission
B10 a1
Body control module
Brake fuse 10a
C1 c9
C1 d12
C1 e8
C175
C2 c2
C4 b
C4 c
Clutch start switch
Crank fuse 10a
Cruise
Cruise control module
Cruise control on/off switch
Cruise fuse 10a
E11
Electronic brake control module
Exc m74 transmission
F10
From auxiliary battery relay (diagram 1 of 6)
From ign a fuse (diagram 1 of 6)
Front axle actuator
Htr/ac fuse 30a
Hvac 1 fuse 10a
Hvac control module
Ign 0 fuse 10a
Ign 3 fuse 10a
Ignition switch
Lock
Mode actuator
Off
Pnk
Power takeoff (pto) switch
Powertrain control module
Pto
Rear wheel steering control module
Recirculation actuator
Red
Right i/p fuse block (lower right side of dash)
Run
Start
Steering wheel speed/ position sensor
Stoplamp switch
Tbc ign 0 fuse 10a
Theft deterrent control module
Tranmission control module
Transfer case shift control switch
Turn signal multifunction switch
Underhood fuse block (left side of engine compt, near battery)

4.8L VIN V, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra 2003 1500

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List of elements for 4.8L VIN V, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra 2003 1500:

(left side of engine compt, near battery) underhood fuse block
(not used)
A/c comp relay
Acc
Auxiliary power outlet
B/u lp fuse 20a
Body control module
C c8
C1 b2
C10
C8 d8
Clutch start switch (m/t)
D c5
D10 c1
Defog relay
E c3
Exc 8.l w/o california lev
Exc seo
F11
F8 c2
From ign 1 relay (diagram 3 of 6)
From ign b fuse (diagram 1 of 6)
G203 (behind left side of dash, near left "a" pillar)
Heated oxygen sensor bank 1 sensor 1
Heated oxygen sensor bank 1 sensor 2
Heated oxygen sensor bank 2 sensor 1
Heated oxygen sensor bank 2 sensor 2
I/p relay block (left of steering column)
Ign e fuse 10a
Ignition switch
Inflatable restraint i/p module disable switch
Inflatable restraint passenger presence module
Inflatable restraint sensing & diagnostic module
Inside rearview mirror
Instrument panel cluster
Left i/p fuse block (behind lower left side of dash)
Lock
Nca
O2a fuse 15a
O2b fuse 15a
Off
Park/neutral position switch (a/t)
Pnk
Rr wpr fuse 15a
Run
S337
S338
Selectable ride switch
Seo
Seo accy fuse 10a
Seo ign fuse 10a
Sir fuse 15a
Start
Tbc accy fuse 10a
Tbc ign 1 fuse 10a
Thermo cupholder assembly
Turn signal/ multifunction switch
Upfitter battery junction block
W/ thermo console
W/o thermo console
Windshield wiper motor module
Ws wpr fuse 25a

5.3L VIN T

5.3L VIN T, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra 2003 1500

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List of elements for 5.3L VIN T, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra 2003 1500:

(base) (exc base)
(not used)
125a
40a
4ws fuse 15a
5.3l w/dual batteries
A c7
A12
Abs fuse 60a
Audio amplifier
Auxiliary battery relay (right rear of eng compt)
B c3
B c7
B c9
B11 c1
B12 c1
B2 c3
Battery (left)
Battery (right)
Battery (right) (w/aux battery)
Battery fuse 125a
Body control module
C9 d
Cig ltr fuse 15a
Cigar lighter
D2 c1
Data link connector
Digital radio receiver
E10
Eap fuse 15a
Electronic brake control module
Emergency vehicle roof lamp relay
Evaporative emissions canister vent solenoid
Except luxury
F2 c1
Fuse holder
Fuse holder (w/qs4)
Fusible link
G104 (left rear of eng block)
G200 (behind right side of dash, near "a" pillar)
Generator
I/p relay block (left of steering column)
Ign a fuse 40a
Ign b fuse 40a
Luxury
Megafuse
Nca
Radio
Radio amp fuse 30a
Radio fuse 15a
Rear seat audio (rsa) controller
Rear wheel steering control module
Red
Rr wiper fuse 25a
Rtd fuse 30a
S102
S205 s303
Starter
Starter relay
Stud 1 fuse 40a
Stud 2 fuse 30a
Sunroof fuse 25a
Tbc batt fuse 10a
To 4wd fuse (diagram 5 of 6)
To ignition switch (diagram 5 of 6)
To ignition switch (diagram 6 of 6)
To ipc/dic fuse (diagram 2 of 6)
Trailer connector
Underhood fuse block (left side of engine compt, near battery)
Underhood junction block
Upfitter battery junction block
Vses/ ecas fuse 60a
W/ vses
W/aux battery
W/o vses

5.3L VIN T, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra 2003 1500

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List of elements for 5.3L VIN T, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra 2003 1500:

(cj2) (exc cj2)
(not used)
A c8
A g
A10
Accessory power outlet
Aux pwr fuse 20a
Auxiliary power outlet (bin)
Auxiliary power outlet (console)
Auxiliary power outlet (front)
B c3
B c5
B11
B11 c1
Battery monitor
Blower fuse 40a
Blower motor resistor assembly
C1 c2
C1 f12
C10
C4 e6
C5 c1
D c4
D12
Defog relay
E11 c1
Exc seo
Except luxury
F c8
F/pmp relay
From sunroof fuse (diagram 1 of 6)
G200 (near right 'a" pillar)
G203 (near left "a" pillar)
Garage door opener
Hvac control module
Hvac/ecas fuse 10a
I/p relay block (left of steering column)
In i/p harness) s335
Info fuse 15a
Instrument panel cluster
Ipc/dic fuse 10a
Lh hid fuse 20a
Luxury
Overhead console
Pcm b fuse 20a
Powertrain control module
Rear seat entertainment assembly
Red
Remote playback device (cd player)
Rh hid fuse 20a
Right i/p fuse block (lower right side of dash)
Roof beacon relay
Roof beacon switch
Rr defog fuse 30a
Rr hvac fuse 30a
S336
S338
Seo
Seo b1 fuse 15a
Seo b2 fuse 30a
Stop lp fuse 25a
Stoplamp switch
To lbec 1 fuse (diagram 3 of 6)
Transfer case encoder motor
Transfer case shift control module
Transmission control module
Trec fuse 30a
Underhood fuse block (left side of engine compt, near battery)
Vehicle communication interface module
W/ thermo console
W/o thermo console

5.3L VIN T, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra 2003 1500

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List of elements for 5.3L VIN T, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra 2003 1500:

(below left side of dash, left of steering column) i/p relay block
(left side of engine compt, near battery) underhood fuse block
(lower left side of dash)
(not used)
(passenger seat harness)
A c5
A c6
A/c comp fuse 10a
A/c comp relay
A10 c1
A12
A7 c1
Aux pwr 2 fuse 20a
B c7
B10
B12
B7 c2
Body control module
C c3
C9 c1
Ddm fuse 15a
Driver door module
Driver door unlock relay
Drl fuse 10a
Drl relay
E c10
E c7
E10
E11 c1
E12
E3 c3
Ecc fuse 10a
Etc/ecm fuse 15a
Evaporative emissions (evap) canister purge solenoid
Exc base
F c3
F1 c1
Flash fuse 25a
Fog lp fuse 15a
Fog lp relay
From mbec 1 fuse (diagram 3 of 6)
From pcm b fuse (diagram 2 of 6)
Front passenger door module
Fuel composition sensor
Fuel pump (fp) relay (secondary)
G c4
G104 (on left rear of engine block)
Hdlp-hi relay
Hdlp-low relay
Horn relay
Ign 1 relay
Intake air temperature (iat)/mass airflow (maf) sensor assembly
Lbec 1 fuse 50a
Lbec 2 fuse 50a
Left i/p fuse block
Lock relay
Locks fuse 20a
Lt doors circuit breaker 25a
Lumbar bolster switch (front passenger)
M c4
Mbec 1 fuse 50a
Memory seat module
Park lp relay
Pcm 1 fuse 15a
Pdm fuse 15a
Pnk
Powertrain control module
Red
Right i/p fuse block (lower right side of dash)
Rt door circuit breaker 25a
S102
S328
Sba fuse 15a
Seat adjuster switch (driver)
Seat adjuster switch (front passenger)
Seat circuit breaker 30a
Tbc 2a fuse 15a
Tbc 2b fuse 15a
Tbc 2c fuse 15a
Throttle actuator control module (8.1l)
To ign 1 relay (diagram 3 of 6)
To inj 1 fuse (diagram 4 of 6)
To seo ign fuse (diagram 6 of 6)
Turn signal/ hazard flasher module
Unlock relay
W/s wash fuse 15a
W/s wash relay
Window switch (left rear) (crew cab)
Window switch (right rear)

5.3L VIN T, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra 2003 1500

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List of elements for 5.3L VIN T, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra 2003 1500:

(4.3l)
(4.8l, 5.3, 6.0l)
(exc 4.3l)
(left side of engine, compt, near battery) underhood fuse block
(not used)
4.3l
4.3l, 4.8l, 5.3l, 6.0l
4.8l, 5.3, 6.0l
4.8l, 5.3l, 6.0l, 8.1l
8.1l
C10
D10
E10
From pcm 1 fuse (diagram 3 of 6)
Fuel injector 1
Fuel injector 2
Fuel injector 3
Fuel injector 4
Fuel injector 5
Fuel injector 6
Fuel injector 7
Fuel injector 8
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
Inj 1 fuse 15a
Inj 2 fuse 15a
Pnk
Pnk a
S152 (left engine ignition coil jumper harn)
S153 (right engine ignition coil jumper harn)
S154 (right engine ignition coil jumper harn)
S155

5.3L VIN T, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra 2003 1500

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List of elements for 5.3L VIN T, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra 2003 1500:

(30 series) (10/20 series)
(behind lower left side of dash) left i/p fuse block
(not used)
(steering column harness) s240
4wd fuse 15a
Acc
Air temperature actuator (left)
Air temperature actuator (right)
Automatic transmission
B10 a1
Body control module
Brake fuse 10a
C1 c9
C1 d12
C1 e8
C175
C2 c2
C4 b
C4 c
Clutch start switch
Crank fuse 10a
Cruise
Cruise control module
Cruise control on/off switch
Cruise fuse 10a
E11
Electronic brake control module
Exc m74 transmission
F10
From auxiliary battery relay (diagram 1 of 6)
From ign a fuse (diagram 1 of 6)
Front axle actuator
Htr/ac fuse 30a
Hvac 1 fuse 10a
Hvac control module
Ign 0 fuse 10a
Ign 3 fuse 10a
Ignition switch
Lock
Mode actuator
Off
Pnk
Power takeoff (pto) switch
Powertrain control module
Pto
Rear wheel steering control module
Recirculation actuator
Red
Right i/p fuse block (lower right side of dash)
Run
Start
Steering wheel speed/ position sensor
Stoplamp switch
Tbc ign 0 fuse 10a
Theft deterrent control module
Tranmission control module
Transfer case shift control switch
Turn signal multifunction switch
Underhood fuse block (left side of engine compt, near battery)

5.3L VIN T, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra 2003 1500

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List of elements for 5.3L VIN T, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra 2003 1500:

(left side of engine compt, near battery) underhood fuse block
(not used)
A/c comp relay
Acc
Auxiliary power outlet
B/u lp fuse 20a
Body control module
C c8
C1 b2
C10
C8 d8
Clutch start switch (m/t)
D c5
D10 c1
Defog relay
E c3
Exc 8.l w/o california lev
Exc seo
F11
F8 c2
From ign 1 relay (diagram 3 of 6)
From ign b fuse (diagram 1 of 6)
G203 (behind left side of dash, near left "a" pillar)
Heated oxygen sensor bank 1 sensor 1
Heated oxygen sensor bank 1 sensor 2
Heated oxygen sensor bank 2 sensor 1
Heated oxygen sensor bank 2 sensor 2
I/p relay block (left of steering column)
Ign e fuse 10a
Ignition switch
Inflatable restraint i/p module disable switch
Inflatable restraint passenger presence module
Inflatable restraint sensing & diagnostic module
Inside rearview mirror
Instrument panel cluster
Left i/p fuse block (behind lower left side of dash)
Lock
Nca
O2a fuse 15a
O2b fuse 15a
Off
Park/neutral position switch (a/t)
Pnk
Rr wpr fuse 15a
Run
S337
S338
Selectable ride switch
Seo
Seo accy fuse 10a
Seo ign fuse 10a
Sir fuse 15a
Start
Tbc accy fuse 10a
Tbc ign 1 fuse 10a
Thermo cupholder assembly
Turn signal/ multifunction switch
Upfitter battery junction block
W/ thermo console
W/o thermo console
Windshield wiper motor module
Ws wpr fuse 25a

6.0L VIN U

6.0L VIN U, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra 2003 1500

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List of elements for 6.0L VIN U, Power Distribution Wiring Diagram (1 of 6) for GMC Sierra 2003 1500:

(base) (exc base)
(not used)
125a
40a
4ws fuse 15a
5.3l w/dual batteries
A c7
A12
Abs fuse 60a
Audio amplifier
Auxiliary battery relay (right rear of eng compt)
B c3
B c7
B c9
B11 c1
B12 c1
B2 c3
Battery (left)
Battery (right)
Battery (right) (w/aux battery)
Battery fuse 125a
Body control module
C9 d
Cig ltr fuse 15a
Cigar lighter
D2 c1
Data link connector
Digital radio receiver
E10
Eap fuse 15a
Electronic brake control module
Emergency vehicle roof lamp relay
Evaporative emissions canister vent solenoid
Except luxury
F2 c1
Fuse holder
Fuse holder (w/qs4)
Fusible link
G104 (left rear of eng block)
G200 (behind right side of dash, near "a" pillar)
Generator
I/p relay block (left of steering column)
Ign a fuse 40a
Ign b fuse 40a
Luxury
Megafuse
Nca
Radio
Radio amp fuse 30a
Radio fuse 15a
Rear seat audio (rsa) controller
Rear wheel steering control module
Red
Rr wiper fuse 25a
Rtd fuse 30a
S102
S205 s303
Starter
Starter relay
Stud 1 fuse 40a
Stud 2 fuse 30a
Sunroof fuse 25a
Tbc batt fuse 10a
To 4wd fuse (diagram 5 of 6)
To ignition switch (diagram 5 of 6)
To ignition switch (diagram 6 of 6)
To ipc/dic fuse (diagram 2 of 6)
Trailer connector
Underhood fuse block (left side of engine compt, near battery)
Underhood junction block
Upfitter battery junction block
Vses/ ecas fuse 60a
W/ vses
W/aux battery
W/o vses

6.0L VIN U, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra 2003 1500

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List of elements for 6.0L VIN U, Power Distribution Wiring Diagram (2 of 6) for GMC Sierra 2003 1500:

(cj2) (exc cj2)
(not used)
A c8
A g
A10
Accessory power outlet
Aux pwr fuse 20a
Auxiliary power outlet (bin)
Auxiliary power outlet (console)
Auxiliary power outlet (front)
B c3
B c5
B11
B11 c1
Battery monitor
Blower fuse 40a
Blower motor resistor assembly
C1 c2
C1 f12
C10
C4 e6
C5 c1
D c4
D12
Defog relay
E11 c1
Exc seo
Except luxury
F c8
F/pmp relay
From sunroof fuse (diagram 1 of 6)
G200 (near right 'a" pillar)
G203 (near left "a" pillar)
Garage door opener
Hvac control module
Hvac/ecas fuse 10a
I/p relay block (left of steering column)
In i/p harness) s335
Info fuse 15a
Instrument panel cluster
Ipc/dic fuse 10a
Lh hid fuse 20a
Luxury
Overhead console
Pcm b fuse 20a
Powertrain control module
Rear seat entertainment assembly
Red
Remote playback device (cd player)
Rh hid fuse 20a
Right i/p fuse block (lower right side of dash)
Roof beacon relay
Roof beacon switch
Rr defog fuse 30a
Rr hvac fuse 30a
S336
S338
Seo
Seo b1 fuse 15a
Seo b2 fuse 30a
Stop lp fuse 25a
Stoplamp switch
To lbec 1 fuse (diagram 3 of 6)
Transfer case encoder motor
Transfer case shift control module
Transmission control module
Trec fuse 30a
Underhood fuse block (left side of engine compt, near battery)
Vehicle communication interface module
W/ thermo console
W/o thermo console

6.0L VIN U, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra 2003 1500

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List of elements for 6.0L VIN U, Power Distribution Wiring Diagram (3 of 6) for GMC Sierra 2003 1500:

(below left side of dash, left of steering column) i/p relay block
(left side of engine compt, near battery) underhood fuse block
(lower left side of dash)
(not used)
(passenger seat harness)
A c5
A c6
A/c comp fuse 10a
A/c comp relay
A10 c1
A12
A7 c1
Aux pwr 2 fuse 20a
B c7
B10
B12
B7 c2
Body control module
C c3
C9 c1
Ddm fuse 15a
Driver door module
Driver door unlock relay
Drl fuse 10a
Drl relay
E c10
E c7
E10
E11 c1
E12
E3 c3
Ecc fuse 10a
Etc/ecm fuse 15a
Evaporative emissions (evap) canister purge solenoid
Exc base
F c3
F1 c1
Flash fuse 25a
Fog lp fuse 15a
Fog lp relay
From mbec 1 fuse (diagram 3 of 6)
From pcm b fuse (diagram 2 of 6)
Front passenger door module
Fuel composition sensor
Fuel pump (fp) relay (secondary)
G c4
G104 (on left rear of engine block)
Hdlp-hi relay
Hdlp-low relay
Horn relay
Ign 1 relay
Intake air temperature (iat)/mass airflow (maf) sensor assembly
Lbec 1 fuse 50a
Lbec 2 fuse 50a
Left i/p fuse block
Lock relay
Locks fuse 20a
Lt doors circuit breaker 25a
Lumbar bolster switch (front passenger)
M c4
Mbec 1 fuse 50a
Memory seat module
Park lp relay
Pcm 1 fuse 15a
Pdm fuse 15a
Pnk
Powertrain control module
Red
Right i/p fuse block (lower right side of dash)
Rt door circuit breaker 25a
S102
S328
Sba fuse 15a
Seat adjuster switch (driver)
Seat adjuster switch (front passenger)
Seat circuit breaker 30a
Tbc 2a fuse 15a
Tbc 2b fuse 15a
Tbc 2c fuse 15a
Throttle actuator control module (8.1l)
To ign 1 relay (diagram 3 of 6)
To inj 1 fuse (diagram 4 of 6)
To seo ign fuse (diagram 6 of 6)
Turn signal/ hazard flasher module
Unlock relay
W/s wash fuse 15a
W/s wash relay
Window switch (left rear) (crew cab)
Window switch (right rear)

6.0L VIN U, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra 2003 1500

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List of elements for 6.0L VIN U, Power Distribution Wiring Diagram (4 of 6) for GMC Sierra 2003 1500:

(4.3l)
(4.8l, 5.3, 6.0l)
(exc 4.3l)
(left side of engine, compt, near battery) underhood fuse block
(not used)
4.3l
4.3l, 4.8l, 5.3l, 6.0l
4.8l, 5.3, 6.0l
4.8l, 5.3l, 6.0l, 8.1l
8.1l
C10
D10
E10
From pcm 1 fuse (diagram 3 of 6)
Fuel injector 1
Fuel injector 2
Fuel injector 3
Fuel injector 4
Fuel injector 5
Fuel injector 6
Fuel injector 7
Fuel injector 8
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
Inj 1 fuse 15a
Inj 2 fuse 15a
Pnk
Pnk a
S152 (left engine ignition coil jumper harn)
S153 (right engine ignition coil jumper harn)
S154 (right engine ignition coil jumper harn)
S155

6.0L VIN U, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra 2003 1500

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List of elements for 6.0L VIN U, Power Distribution Wiring Diagram (5 of 6) for GMC Sierra 2003 1500:

(30 series) (10/20 series)
(behind lower left side of dash) left i/p fuse block
(not used)
(steering column harness) s240
4wd fuse 15a
Acc
Air temperature actuator (left)
Air temperature actuator (right)
Automatic transmission
B10 a1
Body control module
Brake fuse 10a
C1 c9
C1 d12
C1 e8
C175
C2 c2
C4 b
C4 c
Clutch start switch
Crank fuse 10a
Cruise
Cruise control module
Cruise control on/off switch
Cruise fuse 10a
E11
Electronic brake control module
Exc m74 transmission
F10
From auxiliary battery relay (diagram 1 of 6)
From ign a fuse (diagram 1 of 6)
Front axle actuator
Htr/ac fuse 30a
Hvac 1 fuse 10a
Hvac control module
Ign 0 fuse 10a
Ign 3 fuse 10a
Ignition switch
Lock
Mode actuator
Off
Pnk
Power takeoff (pto) switch
Powertrain control module
Pto
Rear wheel steering control module
Recirculation actuator
Red
Right i/p fuse block (lower right side of dash)
Run
Start
Steering wheel speed/ position sensor
Stoplamp switch
Tbc ign 0 fuse 10a
Theft deterrent control module
Tranmission control module
Transfer case shift control switch
Turn signal multifunction switch
Underhood fuse block (left side of engine compt, near battery)

6.0L VIN U, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra 2003 1500

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List of elements for 6.0L VIN U, Power Distribution Wiring Diagram (6 of 6) for GMC Sierra 2003 1500:

(left side of engine compt, near battery) underhood fuse block
(not used)
A/c comp relay
Acc
Auxiliary power outlet
B/u lp fuse 20a
Body control module
C c8
C1 b2
C10
C8 d8
Clutch start switch (m/t)
D c5
D10 c1
Defog relay
E c3
Exc 8.l w/o california lev
Exc seo
F11
F8 c2
From ign 1 relay (diagram 3 of 6)
From ign b fuse (diagram 1 of 6)
G203 (behind left side of dash, near left "a" pillar)
Heated oxygen sensor bank 1 sensor 1
Heated oxygen sensor bank 1 sensor 2
Heated oxygen sensor bank 2 sensor 1
Heated oxygen sensor bank 2 sensor 2
I/p relay block (left of steering column)
Ign e fuse 10a
Ignition switch
Inflatable restraint i/p module disable switch
Inflatable restraint passenger presence module
Inflatable restraint sensing & diagnostic module
Inside rearview mirror
Instrument panel cluster
Left i/p fuse block (behind lower left side of dash)
Lock
Nca
O2a fuse 15a
O2b fuse 15a
Off
Park/neutral position switch (a/t)
Pnk
Rr wpr fuse 15a
Run
S337
S338
Selectable ride switch
Seo
Seo accy fuse 10a
Seo ign fuse 10a
Sir fuse 15a
Start
Tbc accy fuse 10a
Tbc ign 1 fuse 10a
Thermo cupholder assembly
Turn signal/ multifunction switch
Upfitter battery junction block
W/ thermo console
W/o thermo console
Windshield wiper motor module
Ws wpr fuse 25a

POWER DOOR LOCKS

Power Door Locks Wiring Diagram, Base for GMC Sierra 2003 1500

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List of elements for Power Door Locks Wiring Diagram, Base for GMC Sierra 2003 1500:

(gasoline) (diesel)
87a
A12
B10
B11
B12
Battery
Body control module (on lower left side of dash, near steering column)
C1 2c
C1 c9
C1 d10
C1 d11
C1 d12
C1 f6
C3 b
C3 f
C7 f
Door lock relay
Door unlock relay
Driver door lock actuator
Driver door lock switch
Driver unlock relay
Front passenger door lock actuator
Front passenger door lock switch
G200 (below right side of dash)
G203 (upper left kick panel)
Hot at all times
I/p relay block (behind left side of dash)
Ign key sw
Ignition key alarm switch (on ignition key cylinder)
Instrument panel cluster
Left i/p fuse block (behind left side of dash)
Left i/p fuse block (lower left side of dash)
Left rear door lock actuator
Lock
Lock ctrl
Locks fuse 20a
Pcm ecm (left front of engine compartment)
Relay ctrl
Right i/p fuse block (behind right side of dash)
Right i/p fuse block (lower right side of dash)
Right rear door lock actuator
S202 (in i/p harn, between left i/p fuse & i/p relay blocks)
Serial data
Splice pack sp205 (under left knee bolster trim panel)
Tan
Tbc batt fuse 10a
Underhood fuse block (on left side of engine compt)
Unlock
Unlock ctrl

Power Door Locks Wiring Diagram, Up Level (1 of 2) for GMC Sierra 2003 1500

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List of elements for Power Door Locks Wiring Diagram, Up Level (1 of 2) for GMC Sierra 2003 1500:

(gasoline) (diesel)
(lower left side of dash) left i/p fuse block
87a
A12
B12
Battery
Body control module (on lower left side of dash, near steering column)
C1 a2
C1 a7
C1 f6
C4 l (not used)
Driver door module (inside driver door)
F (not used)
Front passenger door module (inside front passenger door)
G200 (below right side of dash)
G203 (upper left kick panel)
Ground
Hot at all times
I/p relay block (behind left side of dash)
Ign key sw
Ignition key alarm switch (on ignition key cylinder)
Key sw
Key sw sig
Left i/p fuse block (behind left side of dash)
Left rear door lock actuator
Lock ctrl
Locks fuse 20a
Pcm ecm (left front of engine compartment)
Pdm fuse 10a
Rear door lock relay
Rear door unlock relay
Right i/p fuse block (behind right side of dash)
Right rear door lock actuator
S202 (in i/p harn, between left i/p fuse & i/p relay blocks)
Serial data
Tan
Unlock ctrl

Power Door Locks Wiring Diagram, Up Level (2 of 2) for GMC Sierra 2003 1500

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List of elements for Power Door Locks Wiring Diagram, Up Level (2 of 2) for GMC Sierra 2003 1500:

(lower right side of dash) right i/p fuse block
C1 d12
Driver mini wedge door jamb switch
Front passenger mini wedge door jamb switch
Hot at all times
Instrument panel cluster
Key sw
Lock
Splice pack sp205 (under left knee bolster trim panel)
Tan
Tbc batt fuse 10a
Underhood fuse block (on left side of engine compt)

POWER MIRRORS

Electrochromic Mirror Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Electrochromic Mirror Wiring Diagram for GMC Sierra 2003 1500:

A12
A7 c1
Air temp sensor
B11
B12
Back up lamp voltage output c5
Back up voltage
Body control module (bcm) (on lower left side of dash, below steering column)
Body relay block (under left side of dash, near kick panel)
Computer data lines system
Driver door module (ddm)
Driver outside rearview mirror
Electrochromic mirror
G200 (near right "a" pillar)
Ground
Hot in run & start
Ign 1
Inside rearview mirror
Left i/p fuse block (behind lower left side of dash)
Low ref
Mir signal
Nca
On/off
Outside air temperature sensor
Pnk
Right i/p fuse block (on lower right side of dash)
S202 (in i/p harness)
S207 (in headliner harness)
S211 (in i/p harness)
Serial data
Sir fuse 15a
Underhood fuse block

Power Mirrors Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Power Mirrors Wiring Diagram for GMC Sierra 2003 1500:

5 volt ref
B11
Battery
Class 2 serial data
Computer data lines system
Ddm fuse 15a
Driver door module (behind left front door trim panel, near handle)
Driver outside rearview mirror
Electro- chromic
Folding/ telescoping motor
Front passenger door module (behind right front door trim, near handle)
Front passenger outside rearview mirror
G200 (near right "a" pillar)
Ground
Heating element
Horizontal
Hot at all times
Hvac control module (behind center of dash)
I/p relay block (below left side of dash, left of steering column)
Left
Left i/p fuse block (lower left side of dash)
Low ref
Lt doors circuit breaker 25a
Mir htr low ref
Mir htr sply voltage
Mir mtr dwn ctrl
Mir mtr extend ctrl
Mir mtr retract ctrl
Mir mtr rt ctrl
Mir position sens sig
Mir sens low ref
Mir signal
Mtr position sens sig
Pdm fuse 15a
Pnk
Red
Right i/p fuse block (lower right side of dash)
Rt door circuit breaker 25a
Rt/dwn mtr common
S202 (in i/p harness)
Tan
Vert posit sens sig
Vertical

POWER SEATS

Driver Seat Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Driver Seat Wiring Diagram for GMC Sierra 2003 1500:

Back
C10
Crew cab
Driver seat adjuster switch
Driver seat front vertical motor
Driver seat horizontal motor
Driver seat rear vertical motor
Except crew cab
Front dn
Front up
Fwd
G305 (on left "b" pillar)
G306 (on right "b" pillar)
Hot at all times
I/p relay block
Rear dn
Rear up
Red
Seats circuit breaker 30a
Tan

Heated Seats Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Heated Seats Wiring Diagram for GMC Sierra 2003 1500:

(in driver seat jumper harness)
(in driver's seat harness) s311
(not used)
Back & cushion select
Back only ind
Back only indicator
Back only select
Batt
Batt (+)
Bck & csh select
C1 4a
C1 7e
C1 a7
C1 c9
C1 f6
C10 h
C2 f
C3 c
C3 d
C3 f
C4 a
C7 c
C7 e
Computer data lines system
Ddm fuse 15a
Driver back heated seat element
Driver cushion heated seat element
Driver door module
Element control
Front passenger back heated seat element
Front passenger cushion heated seat element
Front passenger door module
G200 (behind right side of dash, near right "a" pillar)
G305 (on left "b" pillar)
Gnd
Ground
Hi heat ind
Hi heat indicator
Hot at all times
I/p relay block
Left i/p fuse block
Low heat ind
Low heat indicator
Low ref
Lt doors circuit breaker 25a
Med heat ind
Med heat indicator
Memory seat module (underside of left front seat)
Memory/heated seat switch
Nca
Pdm fuse 10a
Pnk
Right i/p fuse block
Rt doors circuit breaker 30a
S202
S314
Seats circuit breaker 30a
Serial data
Switch power
Tan
Temp signal

Passenger Full Feature Seat Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Passenger Full Feature Seat Wiring Diagram for GMC Sierra 2003 1500:

Back
C10
Fr dn
Fr up
Front passenger seat adjuster switch
Front passenger seat front vertical motor
Front passenger seat horizontal motor
Front passenger seat rear recliner motor
Front passenger seat rear vertical motor
Fwd
G306 (on right "b" pillar)
Hot at all times
I/p relay block
Red
Rr dn
Rr up
S328
S329
Seats circuit breaker 30a
Tan

Passenger"s Lumbar Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Passenger"s Lumbar Wiring Diagram for GMC Sierra 2003 1500:

C10 e
Front passenger lumbar/ bolster switch
Front passenger seat bolster m0tor
Front passenger seat lumbar m0tor
G306 (on right "b" pillar)
Hot at all times
I/p relay block
Out
Pnk
S328
S329
Seats circuit breaker 30a

POWER WINDOWS

Power Windows Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Power Windows Wiring Diagram for GMC Sierra 2003 1500:

(crew cab)
B+ volt
B12
Bcm class 2 serial data
Body control module (left side of dash)
Body relay block
C1 7b
C10
C7 e
Ddm class 2 serial data
Driver door module
Driver window motor
Front passenger door module
Front passenger window motor
G305 (on left "b" pillar)
G306 (on right "b" pillar)
Ground
Hot at all times
Illumination
Interior lights system
Left front window
Left i/p fuse block (left side of dash)
Left rear window
Left rear window motor
Left window switch
Logic
Lt doors circuit breaker 25a
Pwr wnd lockout lr sig
Pwr wnd lockout lr signal
Pwr wnd lockout rr sig
Pwr wnd lockout rr signal
Pwr wnd motor lf down cntrl
Pwr wnd motor lf up cntrl
Pwr wnd motor lr rear down cntrl
Pwr wnd motor lr rear up cntrl
Pwr wnd motor rf down cntrl
Pwr wnd motor rf up cntrl
Pwr wnd motor rr rear down cntrl
Pwr wnd motor rr rear up cntrl
Pwr wnd sw lr down sig
Pwr wnd sw lr up sig
Pwr wnd sw rr down sig
Pwr wnd sw rr up sig
Pwr wnd switch lr down signal
Pwr wnd switch lr up signal
Pwr wnd switch rr down signal
Pwr wnd switch rr up signal
Right i/p fuse block (right side of dash)
Right rear window
Right rear window motor
Right window switch
Rr window (crew cab)
Rt doors circuit breaker 25a
Splice pack sp205
Switch power
Tan
Window down
Window right front
Window up

RADIO

Base Radio Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Base Radio Wiring Diagram for GMC Sierra 2003 1500:

A10
A11
A12
Antenna
Aud out -
B10
B11
B12
Bare
Cell voice sig
Coax
Common aud sig
Computer data lines system
Digital radio antenna
Digital radio receiver (if equipped)
Drain wire
G203 (near left "a" pillar)
Ground
Hot at all times
I/p fuse block (below lower left side of dash)
Left aud sig
Left front door speaker
Left front tweeter speaker
Left i/p fuse block (on lower left side of dash)
Left rear door speaker (except standard cab) left rear speaker (standard cab)
Lf aud +
Lf spk out+
Lf spk out-
Lr spk out +
Lr spk out -
Radio
Radio fuse 15a
Rf spk out +
Rf spk out -
Right aud sig
Right front door speaker
Right front tweeter speaker
Right i/p fuse block (on lower right side of dash)
Right rear door speaker (except standard cab) right rear speaker (standard cab)
Rr spk out+
Rr spk out-
Rt aud +
Serial data
Tan
Underhood fuse block (at left side of engine compartment)
Vehicle communication interface module (behind passenger air bag module)
Voice low ref
Voice signal

Mid-Line Radio Wiring Diagram, with Rear Seat Audio (1 of 3) for GMC Sierra 2003 1500

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List of elements for Mid-Line Radio Wiring Diagram, with Rear Seat Audio (1 of 3) for GMC Sierra 2003 1500:

(in console harness) s330
A10
A11
A12
Antenna
B10
B11
B12
B31
Bare
Bcm class 2 serial data
Body control module (on lower left side of dash)
C201
Cell voice sig
Common aud sig
Computer data lines system
Drain wire
Enable sig
Engine controls system
G203 (near left "a" pillar)
Ground
Hot at all times
I/p relay block (below lower left side of dash)
Inflatable restraint steering wheel module coil
Left aud sig
Lf spk out+
Lf spk out-
Lr aud sig+
Lr aud sig-
Lr spk out +
Lr spk out -
Nca
Pnk
Program
Radio
Radio fuse 15a
Radio mute
Radio on sig
Rear seat audio controller (on rear of center console)
Remote radio control signal
Rf spk out +
Rf spk out -
Right aud sig
Rr aud sig+
Rr aud sig-
Seek down
Seek up
Serial data
Source down
Source up
Splice pack sp205
Steering wheel audio controls
Tan
Underhood fuse block (at left side of engine compartment)
Vehicle communication interface module
Voice
Voice low ref
Voice signal
Volume down
Volume up
Vss signal

Mid-Line Radio Wiring Diagram, with Rear Seat Audio (2 of 3) for GMC Sierra 2003 1500

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List of elements for Mid-Line Radio Wiring Diagram, with Rear Seat Audio (2 of 3) for GMC Sierra 2003 1500:

A10
A11
A12
Audio amplifier
B10
B11
B12
Bare
Drain wire
Ground
Hot at all times
I/p relay block (below lower left side of dash)
L spk out+
L spk out-
Left front door speaker
Left front tweeter speaker
Left i/p fuse block (on lower left side of dash)
Left rear door speaker
Left subwoofer
Lf aud sig+
Lf aud sig-
Lf spkr out+
Lf spkr out-
Lr aud sig+
Lr aud sig-
Lr spkr out+
Lr spkr out-
Pnk
R spk out+
R spk out-
Radio fuse 15a
Radio mute
Radio on sig
Rf aud sig+
Rf aud sig-
Rf spkr out+
Rf spkr out-
Right "d" pillar (except escalade ext)
Right front door speaker
Right front tweeter speaker
Right i/p fuse block (on lower right side a of dash)
Right subwoofer
Rr aud sig+
Rr aud sig-
Rr spkr out+
Rr spkr out-
Rsa enable
Subwoofer speaker
Tan
Underhood fuse block (at left side of engine compartment)

Mid-Line Radio Wiring Diagram, with Rear Seat Audio (3 of 3) for GMC Sierra 2003 1500

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List of elements for Mid-Line Radio Wiring Diagram, with Rear Seat Audio (3 of 3) for GMC Sierra 2003 1500:

Antenna
Aud out -
B11
Bare
Coax
Com aud sig
Computer data lines system
Data lines
Digital radio antenna
Digital radio receiver (if equipped)
Drain wire
G203 (near left "a" pillar)
Ground
Hot at all times
I/p relay block (below lower left side of dash)
Info fuse 15a
Lf aud +
Lt aud sig
Nca
Rear seat entertainment assembly (if equipped)
Rt aud +
Rt aud sig
Serial data
Splice pack sp250
Underhood fuse block (at left side of engine compartment)

Mid-Line Radio Wiring Diagram, without Rear Seat Audio (1 of 3) for GMC Sierra 2003 1500

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List of elements for Mid-Line Radio Wiring Diagram, without Rear Seat Audio (1 of 3) for GMC Sierra 2003 1500:

(in console harness)
A10
A11
A12
Antenna
B10
B11
B12
B31
Bare
Bcm class 2 serial data
Body control module
C201
Cell voice sig
Coax
Common aud sig
Drain wire
Enable sig
Engine controls system
G203 (near left "a" pillar)
Ground
Hot at all times
I/p relay block (below lower left side of dash)
Inflatable restraint steering wheel module coil
Left aud sig
Lf spk out +
Lf spk out -
Lr aud sig +
Lr aud sig -
Nca
Pnk
Program
Radio
Radio fuse 15a
Radio mute
Radio on sig
Remote radio control signal
Rf spk out +
Rf spk out -
Right aud sig
Rr aud sig +
Rr aud sig -
S330
Seek down
Seek up
Serial data
Source down
Source up
Splice pack sp205
Steering wheel audio controls
Tan
Underhood fuse block (at left side of engine compartment)
Vehicle communication interface module
Voice
Voice low ref
Voice signal
Volume down
Volume up
Vss signal

Mid-Line Radio Wiring Diagram, without Rear Seat Audio (2 of 3) for GMC Sierra 2003 1500

Tüm kablolama şemalarına erişin araba

List of elements for Mid-Line Radio Wiring Diagram, without Rear Seat Audio (2 of 3) for GMC Sierra 2003 1500:

A10
A11
A12
Audio amplifier
B10
B11
B12
Bare
C1 b2
Drain wire
Ground
Hot at all times
I/p relay block (below lower left side of dash)
L spk out+
L spk out-
Left front door speaker
Left front tweeter speaker
Left i/p fuse block (on lower left side of dash)
Left rear door speaker
Left subwoofer
Lf aud sig+
Lf aud sig-
Lf spkr out+
Lf spkr out-
Lr aud sig+
Lr aud sig-
Lr spkr out+
Lr spkr out-
Pnk
R spk out+
R spk out-
Radio amp fuse 30a
Radio fuse 15a
Radio mute
Radio on sig
Rf aud sig+
Rf aud sig-
Rf spkr out+
Rf spkr out-
Right front door speaker
Right front tweeter speaker
Right i/p fuse block (on lower right side a of dash)
Right rear door speaker
Right subwoofer
Rr aud sig+
Rr aud sig-
Rr spkr out+
Rr spkr out-
Rsa enable
Subwoofer speaker
Tan
Underhood fuse block (at left side of engine compartment)

Mid-Line Radio Wiring Diagram, without Rear Seat Audio (3 of 3) for GMC Sierra 2003 1500

Tüm kablolama şemalarına erişin araba

List of elements for Mid-Line Radio Wiring Diagram, without Rear Seat Audio (3 of 3) for GMC Sierra 2003 1500:

Antenna
Aud out -
B11
Bare
Coax
Com aud sig
Computer data lines system
Data lines
Digital radio antenna
Digital radio receiver (if equipped)
Drain wire
G203 (near left "a" pillar)
Ground
Hot at all times
I/p relay block (below lower left side of dash)
Info fuse 15a
Lf aud +
Lt aud sig
Nca
Rear seat entertainment assembly (if equipped)
Rt aud +
Rt aud sig
Serial data
Splice pack sp250
Underhood fuse block (at left side of engine compartment)

Premium Sound Radio Wiring Diagram, with CD, with Rear Entertainment, with Digital Receiver (1 of 3) for GMC Sierra 2003 1500

Tüm kablolama şemalarına erişin araba

List of elements for Premium Sound Radio Wiring Diagram, with CD, with Rear Entertainment, with Digital Receiver (1 of 3) for GMC Sierra 2003 1500:

(in console harness)
A10
A11
A12
Antenna
B10
B11
B12
B31
Bare
Bcm class 2 serial data
Body control module
C201
Cell voice sig
Coax
Common aud sig
Computer data lines system
Drain wire
G203 (near left "a" pillar)
Ground
Hot at all times
I/p fuse block (below lower left side of dash)
Inflatable restraint steering wheel module coil
Left aud sig
Lf aud sig+
Lf aud sig-
Lr aud sig +
Lr aud sig -
Lr aud sig+
Lr aud sig-
Nca
Program
Radio
Radio fuse 15a
Rear seat audio controller (on rear of center console)
Remote radio control signal
Rf aud sig +
Rf aud sig -
Right aud sig
Rr aud sig+
Rr aud sig-
S210
S333
Seek down
Seek up
Serial data
Source down
Source up
Splice pack sp205
Steering wheel audio controls
Tan
Underhood fuse block (at left side of engine compartment)
Vehicle communication interface module (behind right side of dash)
Voice
Voice low ref
Voice signal
Volume down
Volume up

Premium Sound Radio Wiring Diagram, with CD, with Rear Entertainment, with Digital Receiver (2 of 3) for GMC Sierra 2003 1500

Tüm kablolama şemalarına erişin araba

List of elements for Premium Sound Radio Wiring Diagram, with CD, with Rear Entertainment, with Digital Receiver (2 of 3) for GMC Sierra 2003 1500:

A10
A11
A12
Audio amplifier
B10
B11
B12
Bare
Computer data lines system
Drain wire
Ground
Hot at all times
L spk out+
L spk out-
Left front door speaker
Left front tweeter speaker
Left i/p fuse block (on lower left side l of dash)
Left rear door speaker
Left subwoofer
Lf aud sig+
Lf aud sig-
Lf spkr out+
Lf spkr out-
Lr spkr out+
Lr spkr out-
Mic sup volt
Noise compensation microphone
R spk out+
R spk out-
Radio fuse 30a
Rf aud sig+
Rf aud sig-
Rf spkr out+
Rf spkr out-
Right front door speaker
Right front tweeter speaker
Right i/p fuse block (on lower right side b of dash)
Right rear door speaker
Right subwoofer
Rr spkr out+
Rr spkr out-
Serial data
Subwoofer speaker
Tan
Underhood fuse block (at left side of engine compartment)

Premium Sound Radio Wiring Diagram, with CD, with Rear Entertainment, with Digital Receiver (3 of 3) for GMC Sierra 2003 1500

Tüm kablolama şemalarına erişin araba

List of elements for Premium Sound Radio Wiring Diagram, with CD, with Rear Entertainment, with Digital Receiver (3 of 3) for GMC Sierra 2003 1500:

(near left "a" pillar) g203
Antenna
Aud out -
Bare
Cd player remote playback device (if equipped)
Coax
Computer data lines system
Digital radio antenna
Digital radio receiver (if equipped)
Dimming
Drain wire
Ground
Hot at all times
I/p fuse block (below lower left side of dash)
Info fuse 15a
Interior lights system
Lf aud +
Nca
Rt aud +
S335
Serial data
Splice pack sp250
Tan
Underhood fuse block (at left side of engine compartment)

Premium Sound Radio Wiring Diagram, with CD (1 of 2) for GMC Sierra 2003 1500

Tüm kablolama şemalarına erişin araba

List of elements for Premium Sound Radio Wiring Diagram, with CD (1 of 2) for GMC Sierra 2003 1500:

(in console harness)
A10
A11
A12
Antenna
B10
B11
B12
B31
Bare
Bcm class 2 serial data
Body control module
C201
Cell voice sig
Coax
Common aud sig
Computer data lines
Drain wire
G203 (near left "a" pillar)
Ground
Hot at all times
I/p fuse block (below lower left side of dash)
Inflatable restraint steering wheel module coil
Left aud sig
Lf aud sig+
Lf aud sig-
Lr aud sig +
Lr aud sig -
Lr aud sig+
Lr aud sig-
Nca
Program
Radio
Radio fuse 15a
Rear seat audio controller (on rear of center console)
Remote radio control signal
Rf aud sig +
Rf aud sig -
Right aud sig
Rr aud sig+
Rr aud sig-
S210
S333
Seek down
Seek up
Serial data
Source down
Source up
Splice pack sp205
Steering wheel audio controls
System
Tan
Underhood fuse block (at left side of engine compartment)
Vehicle communication interface module (behind right side of dash)
Voice
Voice low ref
Voice signal
Volume down
Volume up

Premium Sound Radio Wiring Diagram, with CD (2 of 2) for GMC Sierra 2003 1500

Tüm kablolama şemalarına erişin araba

List of elements for Premium Sound Radio Wiring Diagram, with CD (2 of 2) for GMC Sierra 2003 1500:

A10
A11
A12
Aud out -
Audio amplifier
B10
B11
B12
Bare
Cd player remote playback device
Computer data lines system
Dimming
Drain wire
Ground
Hot at all times
Info fuse 15a
Interior lights system
L spk out+
L spk out-
Left front door speaker
Left front tweeter speaker
Left i/p fuse block (on lower left side l of dash)
Left rear door speaker
Left subwoofer
Lf aud +
Lf aud sig+
Lf aud sig-
Lf spkr out+
Lf spkr out-
Lr spkr out+
Lr spkr out-
Mic sup volt
Noise compensation microphone
R spk out+
R spk out-
Radio fuse 30a
Rf aud sig+
Rf aud sig-
Rf spkr out+
Rf spkr out-
Right front door speaker
Right front tweeter speaker
Right i/p fuse block (on lower right side b of dash)
Right rear door speaker
Right subwoofer
Rr spkr out+
Rr spkr out-
Rt aud +
S335
Serial data
Subwoofer speaker
Tan
Underhood fuse block (at left side of engine compartment)

Premium Sound Radio Wiring Diagram, with Digital Radio Receiver (1 of 2) for GMC Sierra 2003 1500

Tüm kablolama şemalarına erişin araba

List of elements for Premium Sound Radio Wiring Diagram, with Digital Radio Receiver (1 of 2) for GMC Sierra 2003 1500:

(in console harness)
A10
A11
A12
Antenna
B10
B11
B12
B31
Bare
Bcm class 2 serial data
Body control module
C201
Cell voice sig
Coax
Common aud sig
Computer data lines system
Drain wire
G203 (near left "a" pillar)
Ground
Hot at all times
I/p fuse block (below lower left side of dash)
Inflatable restraint steering wheel module coil
Left aud sig
Lf aud sig+
Lf aud sig-
Lr aud sig +
Lr aud sig -
Lr aud sig+
Lr aud sig-
Nca
Program
Radio
Radio fuse 15a
Rear seat audio controller (on rear of center console)
Remote radio control signal
Rf aud sig +
Rf aud sig -
Right aud sig
Rr aud sig+
Rr aud sig-
S210
S333
Seek down
Seek up
Serial data
Source down
Source up
Splice pack sp205
Steering wheel audio controls
Tan
Underhood fuse block (at left side of engine compartment)
Vehicle communication interface module (behind right side of dash)
Voice
Voice low ref
Voice signal
Volume down
Volume up

Premium Sound Radio Wiring Diagram, with Digital Radio Receiver (2 of 2) for GMC Sierra 2003 1500

Tüm kablolama şemalarına erişin araba

List of elements for Premium Sound Radio Wiring Diagram, with Digital Radio Receiver (2 of 2) for GMC Sierra 2003 1500:

A10
A11
A12
Antenna
Aud out -
Audio amplifier
B10
B11
B12
Bare
Coax
Computer data lines system
Digital radio antenna
Digital radio receiver
Drain wire
Ground
Hot at all times
L spk out+
L spk out-
Left front door speaker
Left front tweeter speaker
Left i/p fuse block (on lower left side l of dash)
Left rear door speaker
Left subwoofer
Lf aud +
Lf aud sig+
Lf aud sig-
Lf spkr out+
Lf spkr out-
Lr spkr out+
Lr spkr out-
Mic sup volt
Noise compensation microphone
R spk out+
R spk out-
Radio amp fuse 30a
Rf aud sig+
Rf aud sig-
Rf spkr out+
Rf spkr out-
Right front door speaker
Right front tweeter speaker
Right i/p fuse block (on lower right side b of dash)
Right rear door speaker
Right subwoofer
Rr spkr out+
Rr spkr out-
Rt aud +
Serial data
Subwoofer speaker
Tan
Underhood fuse block (at left side of engine compartment)

SHIFT INTERLOCK

Shift Interlock Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Shift Interlock Wiring Diagram for GMC Sierra 2003 1500:

A/t shift lock control solenoid (on steering column)
B/u lp fuse 20a
Btsi fuse 10a
G200 behind right side of dash, near right "a" pillar)
Hot in run or start
Park/ neutral position switch (left side of transmission)
Pnk
S202
Stoplamp switch (top of brake pedal)
Underhood fuse block (at left side of engine compartment)

STARTING/CHARGING

Charging Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Charging Wiring Diagram for GMC Sierra 2003 1500:

(at left side of eng compt, near battery) underhood junction block
(not used)
(w/ sba only)
5.3l w/dual batteries
Auxiliary battery relay (right rear of eng compt)
B12
Battery
Charge indicator control
Computer data lines
Fusible link
Fusible link (8.1l only)
G100 (on lower left of radiator core support)
G105 (on lower right front of eng block)
G106 (on right front of eng block)
G203 (behind left side of dash, near left "a" pillar)
Generator
Generator field duty cycle signal
Ground
Hot in run & start
I/p relay block (below left side of dash, left of steering column)
Ign 1 volt
Ign e fuse 10a
Instrument panel cluster
Ipc class 2 serial data
Left battery
Logig
Pnk
Power distribution system
Powertrain control module (pcm) or engine control module (ecm) (on left front of engine compartment)
Red
Right battery
Right battery (w/aux battery)
Seo ign fuse 10a
Serial data class 2
Splice pack sp205 (in i/p harn)
Starter solenoid
Underhood fuse block (at left side of eng compt, near battery)
W/ seo
W/aux battery
W/o seo

Starting Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Starting Wiring Diagram for GMC Sierra 2003 1500:

(diesel)
(except diesel)
A/t
Acc
C1 a11
C1 a3
C1 a9
C1 b12
C2 a7
C2 d11
C2 e
C2 f3
C2 f9
C2 g
Clutch start switch (m/t) (on top of clutch pedal bracket)
Clutch start switch sign
Crank fuse 10a
Crank sign
D12
F11
Fuse holder
G100 (on lower left of radiator core support)
G105 (on lower right front of eng block)
Ign a fuse 40a
Ign b fuse 40a
Ign e fuse 10a
Ignition switch
Left battery
Lock
M/t
Off
Park/neutral position switch (on left side of transmission)
Pnk
Power distribution system
Powertrain control module (pcm) or engine control module (ecm) (on left front of engine compartment)
Red
Run
Run off
Start
Starter enable relay ctrl
Starter motor
Starter relay
Starter solenoid
Starting/ charging system (fusible link) (8.1l only)
Starting/ charging system (right battery) (5.3l w/ dual batteries)
Ubderhood junction block (at left side of eng compt, near battery)
Underhood fuse block (at left side of eng compt, near battery)
Underhood fuse block (left side of eng compt, near battery)

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram (1 of 2) for GMC Sierra 2003 1500

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List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for GMC Sierra 2003 1500:

1362 (or 353)
2306 (or 371)
Alo: w/ front passenger/ child presence detector
C10
Class 2 serial data
Control
G200 (behind right side of dash, near right "a" pillar)
G304 (under left front seat)
Ground
High control
Hot in run or start
I/p module disable switch signal
I/p module suppression indicator control
I/p relay block (below left side of dash, left of steering column)
Ignition 1 voltage
Igniton 1 volt
Inflatable restraint i/p module (behind right side of dash)
Inflatable restraint i/p module disable switch
Inflatable restraint sensing/diagnostic module (under left front seat)
Inflatable restraint steering wheel module
Inflatable restraint steering wheel module coil
Key switch
Left inflatable restraint front end sensor (on left front of vehicle, by core supprt)
Left signal
Logic
Low control
Low reference
Nca
Off
On-w/o alo auto-w/ alo
Others
Pnk
Red
Red (or pnk)
Right inflatable restraint front end sensor (on right front of vehicle, by core supprt)
Right signal
S205 (in i/p harness)
Shorting bar
Signal
Sir fuse 15a
Stage 1
Stage 2
Tan
Twisted pair wires
Underhood fuse block (at left side of eng compt, near battery)
W/ c99 only
W/ front passenger/ child presence detector

Supplemental Restraints Wiring Diagram (2 of 2) for GMC Sierra 2003 1500

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List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for GMC Sierra 2003 1500:

Air bag
C10
Class 2 serial data
Data link connector (under left side of dash, below steering column)
Driver seat belt switch
Front passenger seat belt switch
G304 (under left front seat)
Ground
I/p mod disable sw sig
I/p mod supp ind ctrl
I/p relay block (below left side of dash, left of steering column)
Ign
Ignition 1 voltage
Inflatable restraint passenger air bag on/off indicator
Inflatable restraint passenger presence system (pps) module (front passenger seat)
Inflatable restraint passenger presence system sensor
Inflatable restraint passenger seat belt tension retractor sensor
Inside rearview mirror instrument
Instrument panel cluster
Ipc class 2 serial data
Left inflatable restraint seat position switch
Memory systems
Off
Pass air bag off ind ctrl
Pass air bag on ind ctrl
Pass seat belt tens 5v ref
Pass seat belt tens lo ref
Pass seat belt tens sig
Pnk
Pps sens 5v ref
Pps sens lo ref
Pps sens sig
Red
Right inflatable restraint seat position switch
Splice pack sp205 (in i/p harness)
Tan

TRANSMISSION

Transfer Case Wiring Diagram, 2-Speed Automatic for GMC Sierra 2003 1500

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List of elements for Transfer Case Wiring Diagram, 2-Speed Automatic for GMC Sierra 2003 1500:

(behind right side of dash, near right "a" pillar)
(left front of engine compt) powertrain control module
(on left front body mount) g110
+5v ref
2-hi ind
2wd
4 hi
4 lo
4-hi ind
4-lo ind
4wd fuse 15a
4wd indicator lamp
4wd lo sig
4wd sw sig
Awd
Awd ind
Axle ctrl
Axle sw sig
Battery
Body relay block (under c1
Brake control
Class ii data
Ctrl
Data link connector (under left side of dash)
Encoder
Encoder low
Encoder sig
Except seo
Front axle actuator
Front propshaft speed sensor
Ft shaft hi
Ft shaft lo
G200
G203 (behind left side of dash, near left "a" pillar)
Gnd
Ground
Hot at all times
Hot in run
Hot in run or start
Ign e fuse 10a
Illumination
Instrument panel cluster
Interior lights system
Left i/p fuse block (lower left side of dash)
Left side of dash)
Lock sol ctrl
Logic
Motor ctrl a
Motor ctrl b
Nca
Neutral ind
Pnk
Rear propshaft speed sensor
Red
Rr shaft hi
Rr shaft lo
Seo
Seo ign fuse 10a
Shift motor
Splice pack sp205 (left side of dash)
Tan
Transfer case encoder motor
Transfer case shift control module (left side of i/p area, behind knee bolster, above parking brake assy)
Transfer case shift control switch
Trec fuse 30a
Underhood fuse block (left side of engine compt, near battery)

Transfer Case Wiring Diagram, 2-Speed Manual for GMC Sierra 2003 1500

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List of elements for Transfer Case Wiring Diagram, 2-Speed Manual for GMC Sierra 2003 1500:

(in engine harness) s165
(w/ allison transmission)
4wd fuse 15a
4wd indicator lamp
Data link connector (under left side of dash)
Dsl(ecm) gas (pcm)
E2 c1
Electronic brake control module (on left side of inner frame)
Except seo
Front axle actuator
G110 (on left front body mount)
Hot in run
Hot in run or start
Ign e fuse 10a
Instrument panel cluster
Left i/p fuse block (lower left side of dash)
Logic
Pnk
Powertrain control module (gas engines) or engine control module (diesel) (left front of engine compt)
Seo
Seo ign fuse 10a
Splice pack sp205 (left side of dash)
Transfer case shift switch (left front of transfer case)
Transmission control module (w/ allison trans) (left front of engine compt)
Underhood fuse block (left side of engine compt, near battery)

4.3L VIN X

4.3L VIN X, A/T Wiring Diagram for GMC Sierra 2003 1500

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List of elements for 4.3L VIN X, A/T Wiring Diagram for GMC Sierra 2003 1500:

(behind left side of dash) g203
(not used) a
(right rear of engine block) g103
+5v
1-2 shift solenoid
1-2 ss
2-3 shift solenoid
2-3 ss
3-2 shift solenoid
3-2 ss
4wd circuit (transfer case & front axle switch)
4wd low
A/t fluid pressure manual valve position switch
Automatic transmission (4l60-e)
B10
B11
B12
Body control module (below steering column)
Brake fuse 10a
Brk sw
C12
Cls 2 data
D3, d2
D4, d2
Data link connector (below steering column)
E11
Ect sig
Engine controls system
Engine coolant temperature sensor (rear of left cylinder head)
Fluid temp sensor
Frt axle sw
G103 (right rear of engine block)
Gnd
Hot at all times
Hot in run
Hot in run & start
Hot in run, acc & start
I/p relay block (below left side of dash)
Ign
Ign0 fuse 10a
Instrument cluster
Instrument panel cluster (ipc)
Ipc/dic fuse 10a
Left i/p fuse block (lower left side of dash)
Lo ref
Malfunction indicator lamp
Mil ctrl
Park/neutral position switch (left side of transmission)
Pc sol hi
Pc sol lo
Pcm 1 fuse 15a
Pcm b fuse 20a
Pnk
Powertrain control module (left front of engine compt)
Press ctrl solenoid
Prnd a
Prnd b
Prnd c
Prnd p
Range b
Range c
Red
Red a
Rev, lo
S103
S312
Sens gnd
Splice pack sp205 (in dash harness)
Stoplight switch (top of brake pedal bracket)
Tan
Tcc pwm
Tcc pwm solenoid
Tcc sol
Tcc solenoid
Tft sens sig
Throttle position sensor (on throttle body assy)
Tow/haul switch
Tp sig
Trans rng a
Underhood fuse block (left side of engine c2 compt, near the battery)
Underhood fuse block (left side of engine compt, near battery)
Vehicle speed sensor (2wd: left rear of transmission) (4wd: left side of transfer case)
Vss hi
Vss lo

4.8L VIN V

4.8L VIN V, A/T Wiring Diagram for GMC Sierra 2003 1500

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List of elements for 4.8L VIN V, A/T Wiring Diagram for GMC Sierra 2003 1500:

(behind left side of dash) g203
(left rear of engine compt) throttle actuator control module
(not used)
(right rear of engine block) g103
1-2 shift solenoid
1-2 ss
2-3 shift solenoid
2-3 ss
3-2 shift solenoid
3-2 ss
4wd circuit (transfer case & front axle switch)
4wd low
A/t fluid pressure manual valve position switch
Automatic transmission (4l60-e)
B10
B11
B12
Body control module (below steering column)
Brake fuse 10a
Brk sw
C12
Cls 2 data
D3, d2
D4, d2
Data link connector (below steering column)
E11
Ect sig
Engine controls system
Engine coolant temperature sensor (front of left cylinder head)
Except seo
Fluid temp sensor
Frt axle sw
Gnd
Hot at all times
Hot in run
Hot in run & start
Hot in run, acc & start
I/p relay block (below left side of dash)
Ign
Ign0 fuse 10a
Instrument cluster
Instrument panel cluster (ipc)
Ipc/dic fuse 10a
Left i/p fuse block (lower left side of dash)
Lo ref
Malfunction indicator lamp
Mil ctrl
Park/neutral position switch (left side of transmission)
Pc sol hi
Pc sol lo
Pcm 1 fuse 15a
Pcm b fuse 20a
Pnk
Powertrain control module (left front of engine compt)
Press ctrl solenoid
Prnd a
Prnd b
Prnd c
Prnd p
Range b
Range c
Red
Red a
Rev, lo
S103
S312
Sens gnd
Seo
Seo b1 fuse 15a
Serial data
Splice pack sp205 (in dash harness)
Stoplight switch (top of brake pedal bracket)
Tan
Tcc pwm
Tcc pwm solenoid
Tcc sol
Tcc solenoid
Tft sens sig
Tow/haul switch
Trans rng a
Underhood fuse block (left side of engine c2 compt, near the battery)
Underhood fuse block (left side of engine compt, near battery)
Vehicle speed sensor (2wd: left rear of transmission) (4wd: left side of transfer case)
Vss hi
Vss lo

5.3L VIN T

5.3L VIN T, A/T Wiring Diagram for GMC Sierra 2003 1500

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List of elements for 5.3L VIN T, A/T Wiring Diagram for GMC Sierra 2003 1500:

(behind left side of dash) g203
(left rear of engine compt) throttle actuator control module
(not used)
(right rear of engine block) g103
1-2 shift solenoid
1-2 ss
2-3 shift solenoid
2-3 ss
3-2 shift solenoid
3-2 ss
4wd circuit (transfer case & front axle switch)
4wd low
A/t fluid pressure manual valve position switch
Automatic transmission (4l60-e)
B10
B11
B12
Body control module (below steering column)
Brake fuse 10a
Brk sw
C12
Cls 2 data
D3, d2
D4, d2
Data link connector (below steering column)
E11
Ect sig
Engine controls system
Engine coolant temperature sensor (front of left cylinder head)
Except seo
Fluid temp sensor
Frt axle sw
Gnd
Hot at all times
Hot in run
Hot in run & start
Hot in run, acc & start
I/p relay block (below left side of dash)
Ign
Ign0 fuse 10a
Instrument cluster
Instrument panel cluster (ipc)
Ipc/dic fuse 10a
Left i/p fuse block (lower left side of dash)
Lo ref
Malfunction indicator lamp
Mil ctrl
Park/neutral position switch (left side of transmission)
Pc sol hi
Pc sol lo
Pcm 1 fuse 15a
Pcm b fuse 20a
Pnk
Powertrain control module (left front of engine compt)
Press ctrl solenoid
Prnd a
Prnd b
Prnd c
Prnd p
Range b
Range c
Red
Red a
Rev, lo
S103
S312
Sens gnd
Seo
Seo b1 fuse 15a
Serial data
Splice pack sp205 (in dash harness)
Stoplight switch (top of brake pedal bracket)
Tan
Tcc pwm
Tcc pwm solenoid
Tcc sol
Tcc solenoid
Tft sens sig
Tow/haul switch
Trans rng a
Underhood fuse block (left side of engine c2 compt, near the battery)
Underhood fuse block (left side of engine compt, near battery)
Vehicle speed sensor (2wd: left rear of transmission) (4wd: left side of transfer case)
Vss hi
Vss lo

6.0L VIN U

6.0L VIN U, A/T Wiring Diagram for GMC Sierra 2003 1500

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List of elements for 6.0L VIN U, A/T Wiring Diagram for GMC Sierra 2003 1500:

(behind left side of dash) g203
(left rear of engine compt) throttle actuator control module
(not used)
(right rear of engine block) g103
1-2 shift solenoid
1-2 ss
2-3 shift solenoid
2-3 ss
3-2 shift solenoid
3-2 ss
4wd circuit (transfer case & front axle switch)
4wd low
A/t fluid pressure manual valve position switch
Automatic transmission (4l60-e)
B10
B11
B12
Body control module (below steering column)
Brake fuse 10a
Brk sw
C12
Cls 2 data
D3, d2
D4, d2
Data link connector (below steering column)
E11
Ect sig
Engine controls system
Engine coolant temperature sensor (front of left cylinder head)
Except seo
Fluid temp sensor
Frt axle sw
Gnd
Hot at all times
Hot in run
Hot in run & start
Hot in run, acc & start
I/p relay block (below left side of dash)
Ign
Ign0 fuse 10a
Instrument cluster
Instrument panel cluster (ipc)
Ipc/dic fuse 10a
Left i/p fuse block (lower left side of dash)
Lo ref
Malfunction indicator lamp
Mil ctrl
Park/neutral position switch (left side of transmission)
Pc sol hi
Pc sol lo
Pcm 1 fuse 15a
Pcm b fuse 20a
Pnk
Powertrain control module (left front of engine compt)
Press ctrl solenoid
Prnd a
Prnd b
Prnd c
Prnd p
Range b
Range c
Red
Red a
Rev, lo
S103
S312
Sens gnd
Seo
Seo b1 fuse 15a
Serial data
Splice pack sp205 (in dash harness)
Stoplight switch (top of brake pedal bracket)
Tan
Tcc pwm
Tcc pwm solenoid
Tcc sol
Tcc solenoid
Tft sens sig
Tow/haul switch
Trans rng a
Underhood fuse block (left side of engine c2 compt, near the battery)
Underhood fuse block (left side of engine compt, near battery)
Vehicle speed sensor (2wd: left rear of transmission) (4wd: left side of transfer case)
Vss hi
Vss lo

WARNING SYSTEMS

Warning Systems Wiring Diagram (1 of 2) for GMC Sierra 2003 1500

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List of elements for Warning Systems Wiring Diagram (1 of 2) for GMC Sierra 2003 1500:

(behind left side of dash, near left "a" pillar) g203
(on left "b" pillar) g305
(on right "b" pillar) g306
5v reference
A12
Accessory voltage
Anl/drl defeat
Auto
B11
B12
Battery
Body control module (bcm) (on lower left side of dash, below steering column)
Crew cab only
D12
Dimming input
Dimming return
E11
E12
G203 (behind left side of dash, near left "a" pillar)
Ground
Ground distribution system
Head
Headlamp switch
Headlamps on signal
Hot at all times
Hot in acc & run
Hot in acc, run & start
Hot in run & start
I/p relay block (below left side of dash, left of steering column)
Ignition 0 voltage
Ignition 1 voltage
Ignition key alarm switch
Key in ignition switch
Left front door ajar sw
Left i/p fuse block (on lower left side of dash)
Left rear door ajar sw
Left rear mini wedge (door jamb switch)
Park
Park brake sw signal
Park brake switch (part of park brake assembly)
Park lamp on signal
Pnk
Power distribution system
Right front door ajar sw
Right rear door ajar sw
Right rear mini wedge (door jamb switch)
S212 (in i/p harness)
Serial data
Tbc 2a fuse 15a
Tbc 2b fuse 15a
Tbc 2c fuse 15a
Tbc accy fuse 10a
Tbc batt fuse 10a
Tbc ign 0 fuse 10a
Tbc ign 1 fuse 10a
Underhood fuse block (at left side of engine compartment, near battery)

Warning Systems Wiring Diagram (2 of 2) for GMC Sierra 2003 1500

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List of elements for Warning Systems Wiring Diagram (2 of 2) for GMC Sierra 2003 1500:

(behind right side of dash, near right "a" pillar) g200
Computer data lines system
Data link connector (dlc) (partial) (under left side of dash, below steering column)
Door ajar switch
Driver door module (ddm) (behind driver's door trim panel, below switch assembly)
Driver mini wedge (door jamb switch)
Driver seat belt switch
Exterior lights system
Front passenger door module (fpdm) (behind front passenger's door trim panel, below switch assembly)
Front passenger mini wedge (door jamb switch)
Ground distribution system
Ign
Inflatable restraint sensing & diagnostic module (sdm) (under left front seat)
Instrument panel cluster (ipc)
Left door ajar sw
Left i/p fuse block (on lower left side of dash)
Left seat belt
Left turn
Logic
Low reference
Pnk
Powertrain control module (pcm) (on left front of engine compartment)
Radio
Right i/p fuse block (on lower right side of dash)
Right turn
Seat belt
Serial data
Splice pack sp205 (in i/p harness)
Tan
W/anti-theft system
W/convenience package comfort & decor level 3
W/memory seats
W/o convenience package comfort & decor level 3

WIPER/WASHER

Front Washer/Wiper Wiring Diagram for GMC Sierra 2003 1500

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List of elements for Front Washer/Wiper Wiring Diagram for GMC Sierra 2003 1500:

Accessory voltage
G100 (on left side of radiator support)
G200 (behind right side of dash)
G203 (behind left side of dash)
Ground
Hot at all times
Hot in run and acc
Left i/p fuse block (lower left side of dash)
Lsd
Mist
Off
Pnk
Pulse
Red
S100
S202
S217
Tan
Turn signal multi- function switch
Underhood fuse block (on left side of engine compt)
W/s wash fuse 15a
W/s wash relay
W/s wiper fuse 25a
Wash
Windshield washer fluid pump (on washer fluid reservoir)
Windshield washer relay cntrl
Windshield wiper high signal
Windshield wiper motor module (under windshield cowl)
Windshield wiper switch signal
Windshield wiper/ washer switch