All Wiring Diagrams for GMC Cab & Chassis Sierra 2004 3500 model

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 2) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Automatic A/C Wiring Diagram (1 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• (6.6l vin 1)
• (6.6l vin 2)
• (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 high side pressure line)
• 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 (right side of dash)
• 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 (near right "a" pillar)
• G200 (near right side of dash, "a" pillar)
• G203 (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 (left end of hvac module)
• Lower right air temperature sensor (bottom of hvac module)
• 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)
• S218 (in i/p harn)
• S345
• 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)
• Upper right air temperature sensor (below dash trim panel)

Automatic A/C Wiring Diagram (2 of 2) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Automatic A/C Wiring Diagram (2 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• 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
• Left air temperature actuator (bottom of hvac module)
• Left solar sensor
• Left sunload sensor sig
• Logic
• Mode actuator (left side of hvac module)
• Recirculation actuator (upper right of hvac module)
• Right air temperature actuator (top of hvac module)
• Right i/p fuse block (lower right side of dash)
• Right solar sensor
• Right sunload sensor sig
• Sunload sensor assembly (top center of dash)
• Tan

Compressor Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for Compressor Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• (6.6l vin 1)
• (6.6l vin 2)
• (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 high side pressure line)
• 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)

Heater Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for Heater Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• 87a
• B c5
• 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)
• G200 (near right "a" pillar)
• Hot at all times
• Hot in run
• Htr a/c fuse 30a
• Hvac control module (behind center of dash)
• Left i/p fuse block (lower left side of dash)
• Off
• Red
• Right i/p fuse block (lower right side of dash)
• Tan
• Underhood fuse block (left side of engine compt, near battery)

Manual A/C Wiring Diagram (1 of 2) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Manual A/C Wiring Diagram (1 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• (6.6l vin 1)
• (6.6l vin 2)
• (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 high side pressure line)
• 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 (near right "a" pillar)
• G203 (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 Cab & Chassis Sierra 2004 3500

List of elements for Manual A/C Wiring Diagram (2 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• (not used)
• B12
• Body control module (lower left side of dash, below steering column)
• Class 2 serial data
• G200 (near right "a" pillar)
• Left air temperature actuator (bottom of hvac module)
• Logic
• Mode actuator (left side of hvac module)
• Recirculation actuator (upper right of hvac module)
• Right air temperature actuator (top of hvac module)
• Right i/p fuse block (lower right side of dash)
• Tan

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for Anti-lock Brakes Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• (6.6l vin 1)
• (6.6l vin 2)
• (gas)
• (not used)
• A10
• Abs fuse 60a
• Anti-lock ind
• B1 c3
• 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 (m/t) (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 (gas) g106 (diesel) (gas: left rear of eng block, diesel: right front of eng 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
• Nca
• Pnk
• Powertrain or engine control module (pcm or ecm) (on left front of eng compt)
• Red
• Right front sensor (+)
• Right front sensor (-)
• Right front wheel speed sensor
• S102
• Seo
• Seo ign fuse 10a
• Serial data
• Sp205 (in i/p harness)
• Stoplamp switch (on top of brake pedal bracket)
• Tan
• Tcc brake sw
• Transfer case shift control module
• Transmissions system
• Transmissions system (transfer case circuit)
• Underhood fuse block (at left side of engine compt)
• Vehicle speed sensor (vss) (4wd: on left side of transfer case, 2wd: right rear of transmission)
• Vss high
• Vss input
• Vss low
• Vss output

ANTI-THEFT

Forced Entry Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for Forced Entry Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• (inside driver door)
• (inside right front passenger door)
• (lower 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 (rear of driver's door)
• Exterior lights system
• Front passenger door module
• Front passenger mini-wedge door jamb switch (rear of right front door)
• G200 (behind right side of dash)
• G203 (near left "a" pillar)
• 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 relay block (near left kick panel)
• 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) (rear or left rear door)
• Lf door ajar sw
• Lr door ajar sw
• Pk lamp rel
• Rf door ajar sw
• Right i/p fuse block (lower right side of dash)
• Right rear mini-wedge door jamb switch (crew cab) (rear or right rear door)
• Rr door ajar sw
• Serial data
• Splice pack sp205 (in i/p harness)
• Tan
• Tbc batt fuse 10a
• Underhood fuse block (left side of eng compt)
• Uplevel

Passlock Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for Passlock Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• 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 (under left side of dash)
• Except 6.6l vin 2 6.6l vin 2
• G203 (near left "a" pillar)
• Ground
• Hot at all times
• Hot in run & start
• I/p relay block (near left kick panel)
• 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 (pcm) or engine conrtrol module (ecm) (on left front of engine compt)
• S217 (in steering column harness)
• Sec sens sig
• Security indicator
• Security sensor
• Serial data
• Splice pack sp205 (in i/p harn)
• Tamper sensor
• Tbc batt fuse 10a
• Tbc ign 1 fuse 10a
• Underhood fuse block (left side of eng compt)

BODY CONTROL MODULES

Body Control Modules Wiring Diagram (1 of 2) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Body Control Modules Wiring Diagram (1 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• (base) (upper level)
• (bsae)
• (upper level)
• 12 volt ref
• A10
• A11
• A12
• Ambient light sens sig
• Ambient light sensor
• Ambient light sensor (top center of dash)
• Anti-lock brakes system
• Anti-theft system
• B10
• B11
• B12
• Battery +
• Body control module (on lower left side of dash, below steering column)
• 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
• I/p relay block
• 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
• Security 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 Cab & Chassis Sierra 2004 3500

List of elements for Body Control Modules Wiring Diagram (2 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• (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 Cab & Chassis Sierra 2004 3500

List of elements for Computer Data Lines Wiring Diagram, Base & Up-Level for GMC Cab & Chassis Sierra 2004 3500:

• (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 Cab & Chassis Sierra 2004 3500

List of elements for Computer Data Lines Wiring Diagram, Luxury for GMC Cab & Chassis Sierra 2004 3500:

• (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

6.6L VIN 2

6.6L VIN 2, Cruise Control Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for 6.6L VIN 2, Cruise Control Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• A10
• Brake fuse 10a
• C12
• Class 2 data
• Clutch pedal position switch (m/t) (top of clutch pedal)
• Computer data lines system
• Cpp sw
• Cruise control on/off switch
• Cruise fuse 10a
• Cruise ind
• Cruise on input
• Cruise release sw
• Engine control module (left front of engine compt)
• Hot in run
• I/p relay block (left of steering column)
• Ign
• Instrument panel cluster
• Left i/p fuse block (on lower left side of dash)
• Nca
• Off
• Radio
• Rear wheel steering control module (if equipped) (at left rear of vehicle)
• Resume/ accel
• Resume/accel
• Resume/accel sw
• S162 (w/ pto) (i/p harn)
• S240
• Serial data
• Set/ coast
• Set/coast sw
• Stoplamp switch (top of brake pedal)
• Turn signal multifunction switch
• Underhood fuse block
• Veh stop fuse 15a
• Vehicle speed sensor (vss) (m/t) (2wd: left side of transmission) (4wd: left side of transfer case)
• Vss high
• Vss low
• Vss sig

DEFOGGERS

Heated Mirrors Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for Heated Mirrors Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

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

Rear Defogger Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for Rear Defogger Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

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

ELECTRONIC POWER STEERING

Electronic Power Steering Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for Electronic Power Steering Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• 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 Cab & Chassis Sierra 2004 3500

List of elements for Electronic Suspension Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• (on spare tire hoist bracket) g401
• (w/ heavy duty: left side of fuel tank) (w/o heavy duty: left front body mount) g302
• G200 (near right "a" pillar)
• Hot in run and start
• I/p relay block
• I/p relay block (near left kick panel)
• Left front shock absorber solenoid (part of left front shock)
• Left rear shock absorber solenoid (part of left rear shock)
• Normal/ firm
• Pnk
• Right front shock absorber solenoid (part of right front shock)
• Right rear shock absorber solenoid (part of right rear shock)
• S140
• S202
• Selectable ride switch
• Seo ign fuse 10a
• Underhood fuse block (left side of engine compt)

ENGINE PERFORMANCE

6.6L VIN 2

6.6L VIN 2, Engine Performance Wiring Diagram (1 of 6) for GMC Cab & Chassis Sierra 2004 3500

List of elements for 6.6L VIN 2, Engine Performance Wiring Diagram (1 of 6) for GMC Cab & Chassis Sierra 2004 3500:

• (in eng harness) s148
• (on left rear side of engine block) engine oil pressure (eop) sensor
• 12v ref
• 4wd low sig
• 5v ref
• A/c system
• Apps 1 sig
• Apps 3 sig
• Baro sen
• Charge ind
• Chmsl sply
• Cool lev sw
• Coolant level switch (in coolant reservoir)
• Cruise control system
• D pnk
• Ect sen
• Egr mtr hi
• Egr mtr lo
• Egr mtr low
• Eng spd sig
• Engine control module (left front of engine compt)
• Engine coolant temperature sensor (top front of engine)
• Engine oil level switch (left rear of oil pan)
• Exhaust gas recirculation (egr) valve
• Frp sen sig
• Fuel tmp sig
• G102 (on right side of engine block)
• G103 (right rear of engine block)
• G104 (lower left side of engine)
• G108 (lower left side of engine)
• Gen 2 trn on
• Gnd
• Inj 1
• Inj 2
• Inj 3
• Inj 4
• Inj 5
• Inj 6
• Inj 7
• Inj 8
• Instrument cluster system
• Low ref
• Oil press sen
• Oil press sw
• S102
• S103
• S147
• Starting/ charging system
• Tan
• Tbs sig
• Tcc brk sw
• Tran mil ind
• Transmissions system
• Turbocharger vane position control solenoid valve
• Tvp sen
• Tvp sol vlv
• Water in fuel sensor (on fuel filter element)
• Wif ind

6.6L VIN 2, Engine Performance Wiring Diagram (2 of 6) for GMC Cab & Chassis Sierra 2004 3500

List of elements for 6.6L VIN 2, Engine Performance Wiring Diagram (2 of 6) for GMC Cab & Chassis Sierra 2004 3500:

• Accelerator pedal position sensor (behind accelerator pedal)
• Battery 175a
• Closed below 8 deg c (46 deg f)
• Computer data lines system
• Ecmprv fuse 15a
• Edu/ ign1 relay
• F/ pump relay
• Fuel heater (top of fuel filter element)
• Fuel ht fuse 15a
• Fuel pump (left side frame rail)
• Fuse holder
• G104 (lower left side of engine)
• G108 (lower left side of engine)
• G109 (left side of engine block)
• G110 (left front body mount)
• Glow plug 1
• Glow plug 2
• Glow plug 3
• Glow plug 4
• Glow plug 5
• Glow plug 6
• Glow plug 7
• Glow plug 8
• Glow plug controller
• Glow plugs
• Ground
• Hb03
• Hb11
• Hb12
• Hb13
• Hb14
• Hb15
• Hb16
• Hb17
• Hb18
• Hot at all times
• Hot in run & start
• Ign 1 vltg
• Nca
• Pcm b fuse 20a
• Pnk
• Red
• S102
• S127
• Ser data +
• Ser data -
• Tan
• Under- hood fuse block

6.6L VIN 2, Engine Performance Wiring Diagram (3 of 6) for GMC Cab & Chassis Sierra 2004 3500

List of elements for 6.6L VIN 2, Engine Performance Wiring Diagram (3 of 6) for GMC Cab & Chassis Sierra 2004 3500:

• (on right side of engine block) g102
• 12v ref
• 5v ref
• A/c
• Abs system
• Apps 2 sig
• Body relay block
• Brake fuse 10a
• C12
• Class 2 data
• Clutch pedal position switch (top of pedal bracket)
• Computer data lines system
• Crank fuse 10a
• E11
• Ecm 1 fuse 15a
• Egr vlv pos
• Engine control module (left front of engine compt)
• Ficm rly ctrl
• Fp reg sol
• Fuel lev sen
• Fuel pmp rly
• Fuel pressure regulator
• G103 (on right rear of engine block)
• Gen fdc dig
• Gnd
• Hot in off, run & start
• Hot in run
• Hot in run & start
• Hot in start
• I/p fuse block
• Ign vlt
• Ign 0 fuse 10a c1
• Ign 0 vlt
• Ign 1 vlt
• Instrument cluster system
• Low ref
• Maf sens
• Nca
• Pnk
• Red
• S103
• S141
• S142
• S143
• S144
• S174
• Ser data +
• Ser data -
• Starting/charging system
• Stoplamp switch (top of brake pedal bracket)
• System
• Tan
• Under- hood fuse block
• Vss
• Wts ind

6.6L VIN 2, Engine Performance Wiring Diagram (4 of 6) for GMC Cab & Chassis Sierra 2004 3500

List of elements for 6.6L VIN 2, Engine Performance Wiring Diagram (4 of 6) for GMC Cab & Chassis Sierra 2004 3500:

• (in engine harn,
• (in engine harn, approx 13 cm (5.12 in) from left fuel injector bank breakout)
• (in forward lamp harn, approx 5 cm (1.97 in) from c104 breakout)
• (left side of engine block)
• (pins 49-58 not used)
• (pins 6-43 not used)
• (pins 68-81 not used)
• (pins 82-89 not used)
• (pins 95-113 not used)
• (right rear of engine block)
• Approx 10.16 cm (4 in) from fuel injector control module c1 breakout)
• Approx 12.7 cm (5 in) from fuel injector control module c1 breakout)
• Can hi
• Can low
• Computer data lines system
• Engine spd
• Fuel injector control module (under air intake duct)
• Fuel injectors
• Fuel rail pressure sensor (under intake manifold shield, on fuel rail)
• G103
• G109
• Ground
• Hot w/ edu relay energized
• Ic13
• Ic15
• Ic16
• Ic17
• Ic18
• Ic19
• Ic20
• Ic21
• Ic22
• Ic520
• Ic521
• Ic60
• Ign
• Ign 1 vltg
• Ign 2,3,5,8
• 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 command
• Inj2 command
• Inj3 command
• Inj4 command
• Inj5 command'
• Inj6 command
• Inj7 command
• Inj8 command
• Injb fuse 25a
• Iz17
• Iz18
• Nca
• Pnk
• Red
• S166
• S167
• S168
• S169
• S171
• S175
• S176
• Tan
• Underhood fuse block

6.6L VIN 2, Engine Performance Wiring Diagram (5 of 6) for GMC Cab & Chassis Sierra 2004 3500

List of elements for 6.6L VIN 2, Engine Performance Wiring Diagram (5 of 6) for GMC Cab & Chassis Sierra 2004 3500:

• (in engine harness)
• (near right "a" pillar) g200
• Baro sensor (left side of engine)
• Boost pressure sensor (right side of engine)
• Crankshaft position sensor (right side of engine)
• Cruise control system
• Cruise fuse 10a
• Fog lp fuse 15a
• G109 (on left side of engine block)
• Hot in run
• Hot in run & start
• I/p fuse block
• Ind logic
• Intake air temperature (iat)/ mass airflow (maf) sensor (in air induction tube)
• Interior lights system
• Nca
• Off
• Pnk
• Power take off relay (near underhood fuse block)
• Power take off switch
• Red
• S163
• S177
• S205
• S224
• Set
• Tan
• Turbochanger vane position sensor
• Underhood fuse block

6.6L VIN 2, Engine Performance Wiring Diagram (6 of 6) for GMC Cab & Chassis Sierra 2004 3500

List of elements for 6.6L VIN 2, Engine Performance Wiring Diagram (6 of 6) for GMC Cab & Chassis Sierra 2004 3500:

• (m/t)
• (on right side of engine block) g102
• 5-speed a/t
• 6-speed m/t
• A/c comp rly
• A/c system
• B/u lamp sply
• B11
• Camshaft position sensor (front of engine)
• Ckp sen sig
• Computer data lines system
• Cpp sw sig
• Crank vltg
• Cruise control system
• Cruise on sig
• Eng spd sig
• Engine control module (left front of engine compt)
• Exc seo
• Exterior lights system
• Frnt axle sw sig
• Fuel temperature sensor
• G103 (on right rear of engine block)
• Hot at all times
• Iat sens sig
• Ign 1 vltg
• Instrument panel cluster
• Ipc/dic fuse 10a
• Low ref
• Malfunction indicator lamp
• Mil cntrl
• Nca
• P/n sig
• Park/neutral position switch
• Pnk
• Pto cntrl
• Pto eng kill sig
• Pto engage sig
• Pto on sw sig
• Red
• Refrig prss sen
• Res/accel sig
• Rpm out
• S103
• S170
• Seo
• Seo b1 fuse 15a
• Set/coast sig
• Start enable rly
• Starting/charging system
• Tan
• Transmission control module (left front of engine compt)
• Transmissions system
• Underhood fuse block
• Vehicle speed sensor (left rear side of trans)
• Vss hi sig
• Vss low
• Wait to start ind

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for Back-up Lamps Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• (2500 hd, 3500 w/o crew cab) (1500, 2500) (3500 w/ crew cab)
• (2500 hd, 3500 w/o crew cab: left side of fuel tank) (1500, 2500: on spare tire hoist bracket) (3500 w/ crew cab: on left rear body mount)
• (left side of transmission) back-up lamp switch
• (near left kick panel) i/p relay block
• 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 g401 g403
• G403 (on left rear body mount)
• 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)

Exterior Lamps Wiring Diagram (1 of 3) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Exterior Lamps Wiring Diagram (1 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• (2500 hd, 3500 w/o crew cab) (1500, 2500) (3500 w/ crew cab)
• (2500 hd, 3500 w/o crew cab: left side of fuel tank) (1500, 2500: on spare tire hoist bracket) (3500 w/ crew cab: on left rear body mount)
• 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
• Emergency vehicle roof lamp relay
• F11
• Frt park fuse 10a
• G100 (lower left radiator support)
• G200 (behind right side of dash, near right "a" pillar)
• G203 (behind left side of dash, near left "a" pillar)
• G302 g401 g403
• G403 (on left rear body mount)
• 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
• S215
• 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 Cab & Chassis Sierra 2004 3500

List of elements for Exterior Lamps Wiring Diagram (2 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• (2500 hd, 3500 w/o crew cab) (1500, 2500) (3500 w/ crew cab)
• (2500 hd, 3500 w/o crew cab: left side of fuel tank) (1500, 2500: on spare tire hoist bracket) (3500 w/ crew cab: on left rear body mount)
• (except w/ 4-wheel steering)
• (in brake clutch harn)
• (w/ roof marker lamps)
• (w/ 4-wheel steering)
• (w/ pto)
• A12
• Beacon lighting
• 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 g401 g403
• G304 (except crewcab) (under right front seat)
• G305 (crewcab) (on left "b" pillar)
• 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)
• S215
• S219
• S420
• S421
• S422
• S423
• S424
• 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)
• Vehicle roof lamp lighting
• W/ emergency
• W/ roof

Exterior Lamps Wiring Diagram (3 of 3) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Exterior Lamps Wiring Diagram (3 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• (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) (in driver's door)
• Driver outside rearview mirror
• E10
• Ext- erior illum lamp
• F10
• Flash fuse 25a
• Front passenger door module (fpdm) (in right front door)
• 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 (near left kick panel)
• 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 (at roof marker harness)
• S201 (at 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 4) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Ground Distribution Wiring Diagram (1 of 4) for GMC Cab & Chassis Sierra 2004 3500:

• (6.6l vin 1)
• (6.6l vin 2)
• (in forward lamp harness)
• (w/ allison) transmission control module
• 4.3l engine
• 5.3l flex fuel
• A/c compressor clutch
• A/c low pressure switch
• Auxiliary battery relay
• Battery (left)
• Battery (right)
• Brake fluid level switch
• Brake pressure differential switch
• Coolant level switch
• Daytime running lamp (drl) (left)
• Daytime running lamp (drl) (right)
• Diesel
• Engine control module
• Except 4.3l base
• Except 4.3l engine
• F/pmp relay
• Fog lamp (left)
• Fog lamp (right)
• Fuel composition sensor
• G100 (lower left radiator support)
• G102 (diesel) (right side of engine block)
• G102 (gas) (4.3l: lower right front of engine block) (except 4.3l: left side of engine block)
• G104 (left rear of engine block)
• G106 (right front of engine block)
• G107
• 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)
• 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
• Low beam headlamp (left)
• Low beam headlamp (right)
• Mobile radio fuse block
• Park/ neutral position switch
• Park/turn signal lamp (left front)
• Park/turn signal lamp (right front)
• S102 (in engine harness)
• S104 (in engine harness)
• S107
• S156 (in engine harness)
• S157 (in engine harness)
• S223 (in seo harness)
• Throttle actuator control module
• Underhood fuse block (left side of engine compt)
• Upfitter option
• W/ dual horns
• W/aux battery
• W/pto
• Washer fluid level sensor
• Windshield washer fluid pump

Ground Distribution Wiring Diagram (2 of 4) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Ground Distribution Wiring Diagram (2 of 4) for GMC Cab & Chassis Sierra 2004 3500:

• (exc flex fuel) c
• (flex fuel)
• (upfitter option) roof beacon relay
• (upfitter option) roof mounted beacon
• (w/ allison) transmission control module
• Active & elect shift transfer case
• Active & manual shift transfer case
• C1 a
• C2 a
• C2 d
• C3 a
• Crew cab
• Diesel
• Dual tanks
• Electronic brake control module
• Engine oil level switch
• Exc 8.1l w/o calif lev
• Except crew cab
• Front axle actuator
• Fuel heater sensor
• Fuel injector control module
• Fuel pump
• Fuel pump & sender assembly (secondary)
• G101
• G103 (diesel) (right rear of engine block)
• G103 (gas) (right rear of engine block)
• G108 (diesel) (lower left side of engine)
• G109 (diesel) (left side of engine block)
• G110 (left front body mount)
• G304 (except crew cab) (under right front seat)
• G305 (crew cab) (left "b" pillar)
• G306 (on right "b" pillar)
• G390 (near "c" pillar)
• Gas
• Glow plug relay
• Inflatable restraint passenger presense module
• Inflatable restraint sensing & diagnostic module
• Intake air temperature (iat)/mass airflow (maf) sensor
• Manual shift transfer case
• Memory seat module (driver)
• Mini wedge (door jamb switch) (left rear)
• Mini wedge (door jamb switch) (right rear)
• Nca
• Park/ neutral position switch
• Powertrain control module
• Rear wheel steering control module
• Rear window defogger grid
• S103 (in engine harness)
• S110 (in engine harness)
• S329 (in passenger seat harness)
• Seat adjuster switch (passenger)
• Seat bolster/ lumbar switch (passenger)
• Transfer case shift control motor
• Transfer case shift control switch
• Water in fuel sensor
• Window switch (right rear)
• Window switch) (left rear)

Ground Distribution Wiring Diagram (3 of 4) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Ground Distribution Wiring Diagram (3 of 4) for GMC Cab & Chassis Sierra 2004 3500:

• (2500 hd, 3500 w/o crew cab) (1500, 2500) (3500 w/ crew cab)
• (2500 hd, 3500 w/o crew cab: left side of fuel tank) (1500, 2500: on spare tire hoist bracket) (3500 w/ crew cab: on left rear body mount)
• (base) window/ door lock switch (driver)
• (base) window/ door lock switch (passenger)
• (crew cab) backup alarm
• (except luxury)
• (if equipped) left front shock absorber solenoid
• (if equipped) right front shock absorber solenoid
• (left front)
• (left rear)
• (luxury) rear seat entertainment assembly
• (luxury) vehicle communication interface module
• (right front)
• (right rear)
• (tail gate)
• A12
• Audio amplifier
• B12
• Backup lamp (left)
• Backup lamp (right)
• Body control module
• C (gmc)
• C1 2c
• C1 a8
• C1 c5
• C1 d10
• C1 e
• C2 a
• C2 b6
• C3 b6
• Chevy
• Clearance lamps
• Column shift
• Cruise control module
• Data link connector
• Digital radio receiver
• E (chevy)
• Four wheel steering
• From i/p relay block a (diagram 3 of 4)
• G203 (near left "a" pillar)
• G302 g401 g403
• Gmc
• Hazard lamps switch
• Headlamp switch
• Hvac control module
• I/p relay block (near left kick panel)
• Ignition key alarm switch
• Inflatable restraint steering wheel module coil
• Instrument panel cluster
• Left i/p fuse block (lower left side of dash)
• License lamp (left)
• License lamp (right)
• Luxury
• Multi- function accessory switch
• Nca
• Radio
• Rear lamps junction block (inside of left rear frame rail)
• 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 harness)
• S217 (in steering column harn)
• S423
• S424
• Steering wheel dic controls
• Steering wheel speed/ position sensor
• Stop/turn signal lamp (right)
• Stop/turn signal lamp) (left)
• Tail/stop lamp (left)
• Tail/stop lamp (right)
• To i/p relay block (diagram 3 of 4)
• Tow/haul switch
• Traction control switch
• Trailer connector
• 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 (4 of 4) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Ground Distribution Wiring Diagram (4 of 4) for GMC Cab & Chassis Sierra 2004 3500:

• (auto a/c) air temp sensor assembly (inside front)
• (auto a/c) air temp sensor assembly (inside rear)
• (base) driver unlock relay
• (except bose or luxury) auxiliary power outlet (front)
• (except bose or luxury) cigar lighter
• (if equipped) inflatable restraint disable switch
• (if equipped) power takeoff switch
• (if equipped) selectable ride switch
• (luxury) garage door opener
• (not used)
• (upfitter option) emergency vehicle roof lamp relay
• (upfitter option) roof beacon switch
• (upfitter option) wrecker relay
• (w conv package) driver door module
• (w conv package) passenger door module
• (w/o conv package) mini wedge door jamb switch (driver)
• (w/o conv package) mini wedge door jamb switch (passenger)
• (w/o conv package) window/ door lock switch (driver)
• (w/o conv package) window/ door lock switch (passenger)
• A/t shift lock solenoid
• A12
• Auto a/c
• Auxiliary power outlet (bin)
• Auxiliary power outlet (console)
• Auxiliary power outlet (front)
• Blower motor
• Blower motor resistor assembly
• Bose exc luxury
• C1 6c
• C1 a
• C1 b9
• C1 d9
• C1 f6
• C3 c
• C4 a
• C5 e
• C7 f
• C8 f
• C9 a
• Center high mounted stop lamp
• Cigar lighter
• Clearance lamps
• Data link connector
• Dome lamp (front)
• Dome/ reading lamp (rear)
• G200 (behind right side of dash, near right "a" pillar)
• Headlamp switch
• Hvac control module
• 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
• Rear wheel steering switch
• Recirculation actuator
• Right i/p fuse block (lower right side of dash)
• Roof marker lamp (left)
• Roof marker lamp (right)
• S205
• S215 (in brake clutch harness)
• S345
• Transfer case shift control switch
• Unlock relay
• Vanity mirror lamp (left)
• Vanity mirror lamp (right)
• Windshield wiper motor module

HEADLIGHTS

Headlights Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for Headlights Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• (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 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 (near left kick panel)
• 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 multifunction switch
• Underhood fuse block (left side of engine compt)

HORN

Horn Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for Horn Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• (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 Cab & Chassis Sierra 2004 3500

List of elements for Instrument Cluster Wiring Diagram (1 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• (diesel only)
• A10
• A11
• A12
• Abs ind
• Air bag ind
• B10
• B11
• B12
• Battery
• Battery ind
• Body control module (bcm) (on lower left side of dash, below steering column)
• Brake
• Brake ind
• C1 lamp
• Cargo lamp ind
• Class 2 data
• Computer data lines
• Coolant temp gauge
• 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 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 (near left kick panel)
• Ign e fuse 10a
• Ignition
• Illumination
• Instrument panel cluster
• Ipc serial data
• Ipc/dic fuse 10a
• Left turn
• Left turn ind
• Lo wash fluid
• Low fuel ind
• Message display
• Mil cntrl
• Odometer
• Oil gauge
• Orn
• Overdrive off ind
• Pnk
• Prnd321
• Red
• Right turn
• Right turn ind
• S100
• S202
• Seat belt ind
• Security ind
• Seo
• Seo b1 fuse 15a
• Seo ign fuse 10a
• Service 4wd ind
• Soon ind (mil) service engine
• Speedometer
• Tachometer
• Tire pressure ind
• Tow/haul ind
• Traction control ind
• Transmission temp gauge
• Trip
• Trip reset
• Underhood fuse block (left side of engine compt)
• Upshift ind
• Variable dimming
• Volts gauge
• Vss
• Wait to start
• Wait to start ind (diesel only)
• Washer fluid level sensor (in washer fluid reservoir)

Instrument Cluster Wiring Diagram (2 of 2) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Instrument Cluster Wiring Diagram (2 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• (at left rear of vehicle, near spare tire bracket) (w/ 4 wheel steering) rear wheel steering control module
• (diesel only)
• (left rear of engine compt) (gas only, w/ auto cruise control) cruise control module (ccm)
• (near left kick panel) i/p relay block
• (on left front of engine compt) (diesel) engine control module (ecm)
• (w/ luxury package) radio
• 5 volt ref
• 5.3l flex fuel
• A10
• Class 2 data
• Computer data lines
• Coolant level switch (in coolant reservoir)
• Coolnt lev sig
• Diesel
• Diesel (6.6 vin 1)
• Diesel (6.6 vin 2)
• Eng speed sig
• Engine controls system
• Engine oil level switch (on oil pan)
• Engine oil pressure sensor (on top rear of engine)
• Except 5.3l flex fuel
• Fuel
• Fuel lev sens
• Fuel level sensor (primary) (inside fuel tank)
• Fuel level sensor (secondary) (inside fuel tank)
• G103 (on right rear of engine block)
• G104 (gas) (on left rear of engine block)
• G106 (diesel) (on right front of engine block)
• G108
• G203 (behind left side of dash, near left "a" pillar)
• Gas
• I/p relay block
• 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)
• 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 Cab & Chassis Sierra 2004 3500

List of elements for Courtesy Lamps Wiring Diagram (1 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• 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 Cab & Chassis Sierra 2004 3500

List of elements for Courtesy Lamps Wiring Diagram (2 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• (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 Cab & Chassis Sierra 2004 3500

List of elements for Courtesy Lamps Wiring Diagram (3 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• (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 Cab & Chassis Sierra 2004 3500

List of elements for Instrument Illumination Wiring Diagram (1 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• 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 Cab & Chassis Sierra 2004 3500

List of elements for Instrument Illumination Wiring Diagram (2 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• (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 Cab & Chassis Sierra 2004 3500

List of elements for Instrument Illumination Wiring Diagram (3 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• (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 Mirrors Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for Memory Mirrors Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• 5 volt ref
• Batt (+)
• Battery
• Class 2 serial data
• Computer data lines system
• Ddm fuse 15a
• Driver door module (in driver's door)
• Driver outside rearview mirror
• Electro- chromic
• Exit
• Folding/ telescoping motor
• Front passenger door module (in passenger's door)
• Front passenger outside rearview mirror
• G200 (near right "a" pillar)
• Ground
• Heating element
• Horizontal
• Hot at all times
• 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
• Mem 1 sw sig
• Mem 2 sw sig
• Memory/ heated seat switch
• 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)
• Set
• Tan
• Vert posit sens sig
• Vertical

Memory Seat Wiring Diagram (1 of 2) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Memory Seat Wiring Diagram (1 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• (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 Seat Wiring Diagram (2 of 2) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Memory Seat Wiring Diagram (2 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• (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

6.6L VIN 2

6.6L VIN 2, Power Distribution Wiring Diagram (1 of 5) for GMC Cab & Chassis Sierra 2004 3500

List of elements for 6.6L VIN 2, Power Distribution Wiring Diagram (1 of 5) for GMC Cab & Chassis Sierra 2004 3500:

• (base) (exc base)
• (in seo harness)
• (not used)
• 4ws fuse 15a
• A c7
• A12
• Abs fuse 60a
• Audio amplifier
• B c9
• B11 c1
• B12 c1
• B2 c3
• Battery (left)
• Battery (right)
• Battery fuse 175a
• Body control module
• C3 b
• C7 b
• C9 d
• Cig ltr fuse 15a
• Cigar lighter
• D12 c1
• Data link connector
• Digital radio receiver
• Dual generator
• E10
• Eap fuse 15a
• Electronic brake control module
• Emergency vehicle roof lamp relay
• Evaporative emissions canister vent solenoid
• Except luxury
• F2 c1
• Fuse holder
• Fusible link
• G200 (behind right side of dash, near "a" pillar)
• Generator (left)
• Generator (right)
• Glow plug controller
• Harness)
• I/p relay block (left of steering column)
• I/p relay block (near left kick panel)
• Ign a fuse 40a
• Ign b fuse 40a
• Luxury
• Mini fuse 30a
• Mobile radio
• Mobile radio fuse 125a
• Mobile radio fuse block
• Mobile radio relay
• Nca
• Radio
• Radio amp fuse 30a
• Radio fuse 15a
• Rear seat audio (rsa) controller
• Rear seat audio (rsa) controller (crew cab)
• Rear wheel steering
• Rear wheel steering control module
• Rear wheel steering fuse 125a
• Red
• Rr wiper fuse 25a
• Rtd fuse 30a
• S127 (in engine harness)
• S205 s303
• S220 (in seo red
• S221
• S222
• Starter
• Starter relay
• Stud 1 fuse 40a
• Stud 2 fuse 30a
• Sunroof fuse 25a
• Tbc batt fuse 10a
• To ignition switch (diagram 4 of 5)
• To ignition switch (diagram 5 of 5)
• To ipc/dic fuse (diagram 2 of 5)
• Trailer connector
• Underhood fuse block (left side of engine compt)
• Underhood junction block
• Upfitter option
• Vses/ ecas fuse 60a
• W/ california emissions
• W/o california emissions
• Wrecker relay

6.6L VIN 2, Power Distribution Wiring Diagram (2 of 5) for GMC Cab & Chassis Sierra 2004 3500

List of elements for 6.6L VIN 2, Power Distribution Wiring Diagram (2 of 5) for GMC Cab & Chassis Sierra 2004 3500:

• (auto a/c) (man a/c)
• (in i/p harness) s335
• (not used)
• 8s8
• A c10
• A g
• A10
• Aux pwr fuse 20a
• Auxiliary power outlet (bin)
• Auxiliary power outlet (console)
• Auxiliary power outlet (front)
• B c5
• B11
• B11 c1
• Blower fuse 40a
• Blower motor resistor assembly
• C1 c2
• C1 f12
• C10
• C3 b
• C4 d
• C4 e6
• C6 a
• C8 a
• D12
• Defog relay
• E c8
• E11 c1
• Edu/ign1 relay
• Engine control module
• Except luxury
• F/pmp relay
• From radio fuse (diagram 1 of 5)
• G200 (behind right side of dash, near "a" pillar)
• Garage door opener
• Hvac control module
• Hvac/ecas fuse 10a
• I/p relay block (near left kick panel)
• Info fuse 15a
• Instrument panel cluster
• Ipc/dic fuse 10a
• Lh hid fuse 20a
• Luxury
• Nca
• Overhead console
• Pcm b fuse 20a
• 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
• Seo b1 fuse 15a
• Seo b2 fuse 30a
• Stop lp fuse 25a
• Stoplamp switch
• To lbec 1 fuse (diagram 3 of 5)
• Transfer case encoder motor
• Transfer case shift control module
• Transmission control module
• Trec fuse 30a
• Underhood fuse block (left side of engine compt)
• Vehicle communication interface module
• W/o 8s8

6.6L VIN 2, Power Distribution Wiring Diagram (3 of 5) for GMC Cab & Chassis Sierra 2004 3500

List of elements for 6.6L VIN 2, Power Distribution Wiring Diagram (3 of 5) for GMC Cab & Chassis Sierra 2004 3500:

• (left side of engine compt) 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
• B12
• 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
• Ecc fuse 10a
• Ecm 1 fuse 15a
• Egr vacuum control valve solenoid
• Egr vacuum vent solenoid
• Egr valve throttle valve solenoid
• Engine control module
• Exc base
• F c3
• Flash fuse 25a
• Fog lp fuse 15a
• Fog lp relay
• From mbec 1 fuse (diagram 3 of 5)
• From pcm b fuse (diagram 2 of 5)
• Front passenger door module
• Fuel heater
• Fuel ht fuse 15a
• G c4
• Hdlp-hi relay
• Hdlp-low relay
• Horn relay
• I/p relay block (near left kick panel)
• Intake air temperature (iat)/mass air flow (maf) sensor
• 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
• Pdm fuse 10a
• Pnk
• Red
• Right i/p fuse block (lower right side of dash)
• Rt door circuit breaker 25a
• S178
• S179
• S328
• 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
• To fuel ht fuse (diagram 3 of 5)
• Turn signal/ hazard flasher module
• Underhood fuse block (left side of engine compt)
• Unlock relay
• W/s wash fuse 15a
• W/s wash relay
• Window switch (left rear) (crew cab)
• Window switch (right rear)

6.6L VIN 2, Power Distribution Wiring Diagram (4 of 5) for GMC Cab & Chassis Sierra 2004 3500

List of elements for 6.6L VIN 2, Power Distribution Wiring Diagram (4 of 5) for GMC Cab & Chassis Sierra 2004 3500:

• (auto a/c)
• (man a/c)
• (not used)
• (over 8600 gvw) (8600 gvw or less)
• (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
• Engine control module
• Exc m74 transmission
• F10
• From ign a fuse (diagram 1 of 5)
• Front axle actuator
• Htr/ac fuse 30a
• Hvac 1 fuse 10a
• Hvac control module
• Ign 0 fuse 10a
• Ign 3 fuse 10a
• Ignition switch
• Left i/p fuse block (lower left side of dash)
• Lock
• Mode actuator
• Off
• Pnk
• Power takeoff (pto) switch
• 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
• Transfer case shift control switch
• Transmission control module
• Turn signal multifunction switch
• Underhood fuse block (left side of engine compt)

6.6L VIN 2, Power Distribution Wiring Diagram (5 of 5) for GMC Cab & Chassis Sierra 2004 3500

List of elements for 6.6L VIN 2, Power Distribution Wiring Diagram (5 of 5) for GMC Cab & Chassis Sierra 2004 3500:

• (not used)
• 8s8
• A/c comp relay
• Acc
• B/u lp fuse 20a
• Backup lamp switch
• Body control module
• C c8
• C1 b2
• C10
• C8 d8
• Clutch start switch (m/t)
• D c5
• D10 c1
• Defog relay
• E c3
• F11
• From ign b fuse (diagram 1 of 5)
• Fuse block mobile radio (upfitter option)
• I/p relay block (left of steering column)
• I/p relay block (near left kick panel)
• 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 (lower left side of dash)
• Lock
• M/t
• Off
• Park/neutral position switch (a/t)
• Pnk
• Rr wpr fuse 15a
• Run
• Selectable ride switch
• Seo accy fuse 10a
• Seo ign fuse 10a
• Sir fuse 15a
• Start
• Tbc accy fuse 10a
• Tbc ign 1 fuse 10a
• Turn signal/ multifunction switch
• Underhood fuse block (left side of engine compt)
• W/o 8s8
• Windshield wiper motor module
• Ws wpr fuse 25a

POWER DOOR LOCKS

Power Door Locks Wiring Diagram, Base for GMC Cab & Chassis Sierra 2004 3500

List of elements for Power Door Locks Wiring Diagram, Base for GMC Cab & Chassis Sierra 2004 3500:

• (gasoline) (diesel)
• 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
• 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 (near left "a" pillar)
• Hot at all times
• I/p relay block (near left kick panel)
• Ign key sw
• Ignition key alarm switch (on ignition key cylinder)
• Instrument panel cluster
• Left i/p fuse block (lower left side of dash)
• Left rear door lock actuator
• Lock
• Lock ctrl
• Lock relay
• Locks fuse 20a
• Pcm ecm (left front of engine compartment)
• Relay ctrl
• Right i/p fuse block (lower right side of dash)
• Right rear door lock actuator
• S202 (in i/p harn)
• S217
• Serial data
• Splice pack sp205 (in i/p harn)
• Tan
• Tbc batt fuse 10a
• Underhood fuse block (on left side of engine compt)
• Unlock
• Unlock ctrl
• Unlock relay
• W/ crew cab

Power Door Locks Wiring Diagram, Up Level (1 of 2) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Power Door Locks Wiring Diagram, Up Level (1 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• (gasoline) (diesel)
• (lower left side of dash) left i/p fuse block
• 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)
• Door lock switch
• Driver door module (inside driver door)
• F (not used)
• Front passenger door module (inside right front passenger door)
• G200 (behind right side of dash)
• G200 (below right side of dash)
• G203 (near 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 (lower left side of dash)
• Left rear door lock actuator
• Lock
• Lock ctrl
• Lock relay
• Locks fuse 20a
• Pcm ecm (left front of engine compartment)
• Pdm fuse 10a
• 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)
• S217
• Serial data
• Tan
• Unlock
• Unlock ctrl
• Unlock relay

Power Door Locks Wiring Diagram, Up Level (2 of 2) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Power Door Locks Wiring Diagram, Up Level (2 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• (lower right side of dash) right i/p fuse block
• C1 d12
• Driver mini wedge door jamb switch (rear of driver's door)
• Front passenger mini wedge door jamb switch (rear of left front passenger's door)
• Hot at all times
• Instrument panel cluster
• Key sw
• Lock act
• Splice pack sp205 (in i/p harn)
• Tan
• Tbc batt fuse 10a
• Underhood fuse block (on left side of engine compt)

POWER MIRRORS

Electrochromic Mirror Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for Electrochromic Mirror Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• A12
• A7 c1
• Air temp sensor
• Ambient photo 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
• Compass
• Computer data lines system
• Driver door module (ddm) (in driver's door)
• 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 (lower left side of dash)
• Low ref
• Mir signal
• Nca
• On/off
• Outside air temperature sensor
• Pnk
• Rr light photo sensor
• S345
• Selector switch
• Serial data
• Sir fuse 15a
• Temp
• Underhood fuse block (left side of engine compt)

Power Mirrors Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for Power Mirrors Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• 5 volt ref
• B11
• Battery
• Class 2 serial data
• Computer data lines system
• Ddm fuse 15a
• Down
• Driver door module (in driver's door)
• Driver mirror
• Driver outside rearview mirror
• Electro- chromic
• Folding/ telescoping motor
• Front passenger door module (in right front door)
• Front passenger outside rearview mirror
• G200 (near right "a" pillar)
• Ground
• Heating element
• Horizontal
• Hot at all times
• Hvac control module (in center of dash)
• I/p relay block (near left kick panel)
• 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
• Pass- enger mirror
• Pdm fuse 10a
• Pnk
• Red
• Right
• Right i/p fuse block (lower right side of dash)
• Rt door circuit breaker 25a
• Rt/dwn mtr common
• S202
• Switch power
• Tan
• Vert posit sens sig
• Vertical

POWER SEATS

Driver Seat Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for Driver Seat Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• 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 Cab & Chassis Sierra 2004 3500

List of elements for Heated Seats Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• (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 Cab & Chassis Sierra 2004 3500

List of elements for Passenger Full Feature Seat Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• 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 Cab & Chassis Sierra 2004 3500

List of elements for Passenger"s Lumbar Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• 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 Cab & Chassis Sierra 2004 3500

List of elements for Power Windows Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• (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 Cab & Chassis Sierra 2004 3500

List of elements for Base Radio Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• 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 relay block (near left kick panel)
• 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 Cab & Chassis Sierra 2004 3500

List of elements for Mid-Line Radio Wiring Diagram, with Rear Seat Audio (1 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• (i/p harness) sp205
• (in console harness) s330
• A10
• A11
• A12
• Antenna
• B10
• B11
• B12
• B31
• Bare
• Bcm class 2 serial data
• Body control module (below steering column)
• C201
• C277
• Cell voice sig
• Coax
• 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 (near left kick panel)
• Inflatable restraint steering wheel module coil
• Left aud sig
• Left steering wheel audio control switch
• Lf spk out+
• Lf spk out-
• Lr aud sig+
• Lr aud sig-
• Lr spk out +
• Lr spk out -
• Nca
• Pnk
• Prog
• 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
• Right steering wheel audio control switch
• Rr aud sig+
• Rr aud sig-
• Seek dn
• Seek up
• Serial data
• Source dn
• Source up
• Steering wheel
• Tan
• Underhood fuse block (at left side of engine compartment)
• Vehicle communication interface module
• Voice
• Voice low ref
• Voice signal
• Vol dn
• Vol up
• Vss signal

Mid-Line Radio Wiring Diagram, with Rear Seat Audio (2 of 3) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Mid-Line Radio Wiring Diagram, with Rear Seat Audio (2 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• 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 (crew cab) left rear speaker (except crew cab)
• 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 front door speaker
• Right front tweeter speaker
• Right i/p fuse block (on lower right side a of dash)
• Right rear door speaker (crew cab) right rear speaker (except crew cab)
• 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 Cab & Chassis Sierra 2004 3500

List of elements for Mid-Line Radio Wiring Diagram, with Rear Seat Audio (3 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• 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 (near left kick panel)
• Info fuse 15a
• Lf aud +
• Lt aud sig
• Rear seat entertainment assembly (if equipped)
• Rt aud +
• Rt aud sig
• Serial data
• Splice pack sp250 (near hvac control module)
• Underhood fuse block (at left side of engine compartment)

Mid-Line Radio Wiring Diagram, without Rear Seat Audio (1 of 3) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Mid-Line Radio Wiring Diagram, without Rear Seat Audio (1 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• (i/p harness) sp205
• (in console harness)
• A10
• A11
• A12
• Antenna
• B10
• B11
• B12
• B31
• Bare
• Bcm class 2 serial data
• Body control module (below steering column)
• C201
• C277
• Cell voice sig
• Coax
• 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 (near left kick panel)
• Inflatable restraint steering wheel module coil
• Left aud sig
• Left steering wheel audio control switch
• Lf spk out +
• Lf spk out -
• Lr aud sig +
• Lr aud sig -
• Nca
• Pnk
• Prog
• Radio
• Radio fuse 15a
• Radio mute
• Radio on sig
• Remote radio control signal
• Rf spk out +
• Rf spk out -
• Right aud sig
• Right steering wheel audio control switch
• Rr aud sig +
• Rr aud sig -
• S330
• Seek dn
• Seek up
• Serial data
• Source dn
• Source up
• Steering wheel
• Tan
• Underhood fuse block (at left side of engine compartment)
• Vehicle communication interface module
• Voice
• Voice low ref
• Voice signal
• Vol dn
• Vol up
• Vss signal

Mid-Line Radio Wiring Diagram, without Rear Seat Audio (2 of 3) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Mid-Line Radio Wiring Diagram, without Rear Seat Audio (2 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• 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 speaker (crew cab) left rear door speaker (except crew cab)
• 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 speaker (crew cab) right rear door speaker (except crew cab)
• 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 Cab & Chassis Sierra 2004 3500

List of elements for Mid-Line Radio Wiring Diagram, without Rear Seat Audio (3 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• 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 (near left kick panel)
• 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 (near hvac control module)
• 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 Cab & Chassis Sierra 2004 3500

List of elements for Premium Sound Radio Wiring Diagram, with CD, with Rear Entertainment, with Digital Receiver (1 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• (i/p harness) sp205
• (in console harness)
• A10
• A11
• A12
• Antenna
• B10
• B11
• B12
• B31
• Bare
• Bcm class 2 serial data
• Body control module (below steering column)
• C201
• C277
• 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 relay block (near left kick panel)
• Inflatable restraint steering wheel module coil
• Left aud sig
• Left steering wheel audio control switch
• Lf aud sig+
• Lf aud sig-
• Lr aud sig +
• Lr aud sig -
• Lr aud sig+
• Lr aud sig-
• Nca
• Pnk
• Prog
• 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
• Right steering wheel audio control switch
• Rr aud sig+
• Rr aud sig-
• S210
• S333
• Seek dn
• Seek up
• Serial data
• Source dn
• Source up
• Steering wheel
• 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
• Vol dn
• Vol up

Premium Sound Radio Wiring Diagram, with CD, with Rear Entertainment, with Digital Receiver (2 of 3) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Premium Sound Radio Wiring Diagram, with CD, with Rear Entertainment, with Digital Receiver (2 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• 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 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 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 Cab & Chassis Sierra 2004 3500

List of elements for Premium Sound Radio Wiring Diagram, with CD, with Rear Entertainment, with Digital Receiver (3 of 3) for GMC Cab & Chassis Sierra 2004 3500:

• (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 relay block (near left kick panel)
• Info fuse 15a
• Interior lights system
• Lf aud +
• Nca
• Rt aud +
• S335
• Serial data
• Splice pack sp250 (near hvac control module)
• Tan
• Underhood fuse block (at left side of engine compartment)

Premium Sound Radio Wiring Diagram, with CD (1 of 2) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Premium Sound Radio Wiring Diagram, with CD (1 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• (i/p harness) sp205
• (in console harness)
• A10
• A11
• A12
• Antenna
• B10
• B11
• B12
• B31
• Bare
• Bcm class 2 serial data
• Body control module (below steering column)
• C201
• C277
• Cell voice sig
• Coax
• Common aud sig
• Computer data lines
• Computer data lines system
• Drain wire
• G203 (near left "a" pillar)
• Ground
• Hot at all times
• I/p relay block (near left kick panel)
• Inflatable restraint steering wheel module coil
• Left aud sig
• Left steering wheel audio control switch
• Lf aud sig+
• Lf aud sig-
• Lr aud sig +
• Lr aud sig -
• Lr aud sig+
• Lr aud sig-
• Nca
• Pnk
• Prog
• 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
• Right steering wheel audio control switch
• Rr aud sig+
• Rr aud sig-
• S210
• S333
• Seek dn
• Seek up
• Serial data
• Source dn
• Source up
• Steering wheel
• 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
• Vol dn
• Vol up

Premium Sound Radio Wiring Diagram, with CD (2 of 2) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Premium Sound Radio Wiring Diagram, with CD (2 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• 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
• Left rear 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
• Of dash)
• 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 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 Cab & Chassis Sierra 2004 3500

List of elements for Premium Sound Radio Wiring Diagram, with Digital Radio Receiver (1 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• (i/p harness) sp205
• (in console harness)
• A10
• A11
• A12
• Antenna
• B10
• B11
• B12
• B31
• Bare
• Bcm class 2 serial data
• Body control module (below steering column)
• C201
• C277
• 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
• Left steering wheel audio control switch
• Lf aud sig+
• Lf aud sig-
• Lr aud sig +
• Lr aud sig -
• Lr aud sig+
• Lr aud sig-
• Nca
• Pnk
• Prog
• 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
• Right steering wheel audio control switch
• Rr aud sig+
• Rr aud sig-
• S210
• S333
• Seek dn
• Seek up
• Serial data
• Source dn
• Source up
• Steering wheel
• 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
• Vol dn
• Vol up

Premium Sound Radio Wiring Diagram, with Digital Radio Receiver (2 of 2) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Premium Sound Radio Wiring Diagram, with Digital Radio Receiver (2 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• 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 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 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 Cab & Chassis Sierra 2004 3500

List of elements for Shift Interlock Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• A (w/ jf4)
• A/t shift lock control solenoid (on steering column)
• B (w/ jf4)
• B/u lp fuse 20a
• Btsi fuse 10a
• E (w/o jf4)
• F (w/o jf4)
• G200 (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 bracket)
• Underhood fuse block (left side of engine compt, near battery)

STARTING/CHARGING

6.6L VIN 2

6.6L VIN 2, Charging Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for 6.6L VIN 2, Charging Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• (at left side of eng compt, near battery) underhood junction block
• (not used)
• (on left front of engine compartment)
• Auxiliary battery relay (right rear of eng compt)
• Auxiliary generator
• B12
• Battery
• Charge indicator control
• Computer data lines
• Engine control module (ecm)
• Fuse holder
• Fusible link
• G100 (lower left radiator support)
• G102 (right side of engine block)
• G106 (on right front of eng block)
• G106 (right front of eng block)
• G203 (near left "a" pillar)
• Generator 2 turn 0n sig
• Generator field duty cycle signal
• Ground
• Hot in run & start
• I/p relay block (near left kick panel)
• Ign 1 volt
• Ign e fuse 10a
• Instrument panel cluster
• Ipc class 2 serial data
• Left battery
• Logig
• Pnk
• Power distribution system
• Primary generator
• Red
• Right battery
• Right battery (w/aux battery)
• Seo ign fuse 10a
• Serial data class 2
• Sp205 (in i/p harn)
• Starter
• Underhood fuse block (at left side of eng compt)
• Upfitter option
• Volts
• W/ seo
• W/aux battery
• W/dual batteries
• W/o seo

6.6L VIN 2, Starting Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for 6.6L VIN 2, Starting Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• Acc
• C1 a11
• C1 a3
• C1 a9
• C1 b12
• C2 a7
• C2 d11
• C2 f3
• C2 f9
• Clutch start switch (m/t) (on top of clutch pedal bracket)
• Crank fuse 10a
• Crank voltage
• D12
• Engine control module (ecm) (on left front of engine compartment)
• F11
• G100 (on lower left of radiator core support)
• G102 (right side of engine block)
• G106 (right front of engine block)
• Ign a fuse 40a
• Ign b fuse 40a
• Ign e fuse 10a
• Ignition switch
• Left battery
• Lock
• Nca
• Off
• Park/neutral position switch (a/t) (on left side of transmission)
• Pnk
• Power distribution system
• Red
• Right battery
• Run
• Run off
• Start
• Starter enable relay ctrl
• Starter motor
• Starter relay
• Starter solenoid
• Underhood fuse block (at left side of eng compt)
• Underhood fuse block (left side of eng compt)
• Underhood junction block (at left side of eng compt)

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram (1 of 2) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• 1362 (or 353)
• 2306 (or 371)
• Alo: w/ front passenger/ child presence detector
• B tan
• C10
• Class 2 serial data
• Control
• G200 (behind right side of dash, near right "a" pillar)
• G304 (under right front seat)
• Ground
• High control
• Hot in run or start
• I/p junction block (right side of dash behind access panel)
• 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
• Ignition 1 voltage
• 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 support)
• 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 support)
• Right inflatable restraint side impact sensor
• Right signal
• Right voltage
• 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 Cab & Chassis Sierra 2004 3500

List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• Air bag
• C10
• Class 2 serial data
• Data link connector (lower left side of dash)
• Driver seat belt switch
• Front passenger seat belt switch
• G304 (under right 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 (under 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 near fuse block)
• Tan

TRANSMISSION

Transfer Case Wiring Diagram, 2-Speed Automatic for GMC Cab & Chassis Sierra 2004 3500

List of elements for Transfer Case Wiring Diagram, 2-Speed Automatic for GMC Cab & Chassis Sierra 2004 3500:

• (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
• Brake control
• Class ii data
• Ctrl
• Data link connector (under left side of dash, below steering column)
• 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
• I/p relay block (near c1
• Ign e fuse 10a
• Illumination
• Instrument panel cluster
• Interior lights system
• Left i/p fuse block (lower left side of dash)
• Left kick panel)
• 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 (in i/p harn)
• 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)

Transfer Case Wiring Diagram, 2-Speed Manual for GMC Cab & Chassis Sierra 2004 3500

List of elements for Transfer Case Wiring Diagram, 2-Speed Manual for GMC Cab & Chassis Sierra 2004 3500:

• (in engine harness) s165
• (w/ allison transmission)
• 4wd fuse 15a
• 4wd indicator lamp
• Data link connector (under left side of dash below steering column)
• 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
• I/p fuse block (lower left side of dash)
• Ign e fuse 10a
• Instrument panel cluster
• 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 (in i/p harn)
• Transfer case shift control switch (on top of transfer case)
• Transmission control module (w/ allison trans) (left front of engine compt)
• Underhood fuse block (left side of engine compt)

Transfer Case Wiring Diagram, Selectable for GMC Cab & Chassis Sierra 2004 3500

List of elements for Transfer Case Wiring Diagram, Selectable for GMC Cab & Chassis Sierra 2004 3500:

• (left front of engine compt) powertrain control module
• (on left front body mount) g110
• +5v ref
• 4 lo
• 4-hi ind
• 4-lo ind
• 4wd fuse 15a
• 4wd indicator lamp
• 4wd lo sig
• 4wd sw sig
• Awd
• Battery
• Channel a
• Channel b
• Channel c
• Channel p
• Class ii data
• Data link connector (below left side of dash)
• Encoder low
• Except seo
• G200 (near right "a" pillar)
• 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 (behind lower left side of dash)
• Logic
• Motor ctrl a
• Motor ctrl b
• Nca
• Neutral ind
• Pnk
• Red
• Right i/p fuse block (lower c4
• Right side of dash)
• Seo
• Seo ign fuse 10a
• Shift motor
• Splice pack sp205 (behind left i/p fuse block)
• Tcs
• Transfer case encoder motor
• Transfer case shift control module (behind headlamp switch)
• Transfer case shift control switch
• Trec fuse 30a
• Underhood fuse block (left side of engine compt, near battery)

6.6L VIN 2

6.6L VIN 2, A/T Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for 6.6L VIN 2, A/T Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• (in engine harness)
• (left front of engine compt) engine control module
• (right side of engine block) g102
• 12 volt ref
• 4wd circuit (transfer case controls)
• 4wd low sig
• Allison transmission
• B11
• B12
• Battery
• Body control module (below steering column)
• Brake fuse 10a
• C1 vss adapter (4wd) (left side of trans)
• C12 c1
• C12 c2
• Can data hi
• Can data lo
• Class 2 data
• Class 2 serial data
• Computer data lines system
• D5 c1
• Data link connector (below steering column)
• E11
• E4 c1
• Engine controls system
• Except seo
• F10
• F7 c1
• G203 (behind left side of dash)
• Ground
• Hot at all times
• Hot in run
• Hot in run acc & start
• I/p fuse block (lower left side of dash)
• I/p relay block (near left kick panel)
• Ign 0 fuse 10a
• Ignition
• Input speed sensor (in transmission)
• Instrument panel cluster (ipc)
• Ipc/dic fuse 10a
• Iss high
• Iss low
• Low ref
• Main line pres
• Malfunction indicator lamp
• Mil control
• Mil signal
• On/off sol a
• On/off sol b
• On/off sol c
• On/off solenoids
• P/n
• Park/neutral position switch (left side of transmission)
• Park/neutral sig
• Pcm b fuse 20a
• Pcs a high
• Pcs a low
• Pcs b high
• Pcs b low
• Pnk
• Pnk s125
• Pressure switch manifold
• Pto status
• Red
• Red c
• Rev
• Reverse sig
• S103
• S164
• S217
• Seo
• Seo b1 fuse 15a
• Sig hi-front
• Signal high - front
• Solenoid g
• Splice pack sp205 (in i/p harness)
• Stoplamp switch (on brake pedal bracket)
• Tan d
• Tcc brake sw
• Tcc pwm
• Tcc pwm solenoid
• Tcc sol
• Tfp signal c
• Tfp signal d
• Tfp signal e
• Tft sensor
• Tft signal
• Tow/haul switch (if equipped)
• Tr signal a
• Tr signal b
• Tr signal c
• Tr signal p
• Trans id
• Trans mil request
• Transmission control module (left front of engine compt)
• Trim solenoids
• Tss return
• Tss signal
• Turbine speed sensor (in transmission)
• Underhood fuse block (left side of engine compt)
• Vehicle speed sensor (2wd: left rear of transmission) (4wd: left side of transfer case)
• Vss high
• Vss low

WARNING SYSTEMS

Warning Systems Wiring Diagram (1 of 2) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Warning Systems Wiring Diagram (1 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• (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 (near left kick panel)
• 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 door latch assembly
• 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 door latch assembly
• S212 (in i/p harness)
• S217
• 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)

Warning Systems Wiring Diagram (2 of 2) for GMC Cab & Chassis Sierra 2004 3500

List of elements for Warning Systems Wiring Diagram (2 of 2) for GMC Cab & Chassis Sierra 2004 3500:

• (behind right side of dash, near right "a" pillar) g200
• Base
• Computer data lines system
• Data link connector (dlc) (partial) (under left side of dash, below steering column)
• Door ajar switch
• Driver door latch assembly
• Driver door module (ddm) (in driver's door)
• Driver seat belt switch
• Except 6.6l vin 2 6.6l vin 2
• Exterior lights system
• Front passenger door latch assembly
• Front passenger door module (fpdm) (in right front door)
• 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) or engine control module (ecm) (on left front of engine compartment)
• Radio
• Right i/p fuse block (on lower right side of dash)
• Right turn
• Seat belt
• Serial data
• Sp205 (in i/p harness)
• Tan
• W/convenience package comfort & decor level 3
• W/memory seats

WIPER/WASHER

Wiper/Washer Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500

List of elements for Wiper/Washer Wiring Diagram for GMC Cab & Chassis Sierra 2004 3500:

• Accessory voltage
• G100 (on left front body mount)
• G200 (near right "a" pillar)
• G203 (near left "a" pillar)
• Ground
• Hot at all times
• Hot in run and acc
• Left i/p fuse block (behind 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 (left side of cowl)
• Windshield wiper switch signal
• Windshield wiper/ washer switch