POWER DISTRIBUTION – Chevrolet Cab & Chassis Silverado 3500 2004 – SYSTEM WIRING DIAGRAMS

POWER DISTRIBUTION

6.0L VIN U

6.0L VIN U, Power Distribution Wiring Diagram (1 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.0L VIN U, Power Distribution Wiring Diagram (1 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (base) (exc base)
• (in seo harness)
• (not used)
• 4ws fuse 15a
• A c7
• A12
• Abs fuse 60a
• Audio amplifier
• Aux batt fuse 40a
• Auxiliary battery relay (right rear of engine compt)
• B c9
• B11 c1
• B12 c1
• B2 c3
• Battery (left)
• Battery (right)
• Battery (right) (w/aux battery)
• 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
• From 4wd fuse (diagram 5 of 6)
• Fuse holder
• Fusible link
• G104 (left rear of engine block)
• G200 (behind right side of dash, near "a" pillar)
• Generator (left)
• Generator (right)
• 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
• S102
• 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 5 of 6)
• To ignition switch (diagram 6 of 6)
• To ipc/dic fuse (diagram 2 of 6)
• Trailer connector
• Underhood fuse block (left side of engine compt)
• Underhood junction block
• Upfitter option
• Vses/ ecas fuse 60a
• W/aux battery
• W/dual batteries
• Wrecker relay

6.0L VIN U, Power Distribution Wiring Diagram (2 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.0L VIN U, Power Distribution Wiring Diagram (2 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (auto a/c) (man a/c)
• (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
• Except luxury
• F/pmp relay
• From radio fuse (diagram 1 of 6)
• G200 (behind right side of dash, near "a" pillar)
• Garage door opener
• Hvac control module
• Hvac/ecas fuse 10a
• I/p relay block (left of steering column)
• I/p relay block (near left kick panel)
• In i/p harness) s335
• Info fuse 15a
• Instrument panel cluster
• Ipc/dic fuse 10a
• Lh hid fuse 20a
• Luxury
• Nca
• Overhead console
• Pcm b fuse 20a
• Powertrain control module
• Rear seat entertainment assembly
• Red
• Remote playback device (cd player)
• Rh hid fuse 20a
• Right i/p fuse block (lower right side of dash)
• Roof beacon relay
• Roof beacon switch
• Rr defog fuse 30a
• Rr hvac fuse 30a
• Seo b1 fuse 15a
• Seo b2 fuse 30a
• Stop lp fuse 25a
• Stoplamp switch
• To lbec 1 fuse (diagram 3 of 6)
• Transfer case encoder motor
• Transfer case shift control module
• Transmission control module
• Trec fuse 30a
• Underhood fuse block (left side of engine compt)
• Vehicle communication interface module
• W/o 8s8

6.0L VIN U, Power Distribution Wiring Diagram (3 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.0L VIN U, Power Distribution Wiring Diagram (3 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (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
• B10
• B12
• B7 c2
• Body control module
• C c3
• C9 c1
• Ddm fuse 15a
• Driver door module
• Driver door unlock relay
• Drl fuse 10a
• Drl relay
• E c10
• E c7
• E10
• E11 c1
• E12
• E3 c3
• Ecc fuse 10a
• Etc/ecm fuse 15a
• Evaporative emissions (evap) canister purge solenoid
• Exc base
• F c3
• Flash fuse 25a
• Fog lp fuse 15a
• Fog lp relay
• From mbec 1 fuse (diagram 3 of 6)
• From pcm b fuse (diagram 2 of 6)
• From seo ign fuse (diagram 6 of 6)
• Front passenger door module
• Fuel composition sensor
• Fuel pump relay (secondary)
• G c4
• G104 (left rear of engine block)
• Hdlp-hi relay
• Hdlp-low relay
• Horn relay
• I/p relay block (near left kick panel)
• Ign 1 relay
• Intake air temperature (iat)/mass airflow (maf) sensor assembly
• Lbec 1 fuse 50a
• Lbec 2 fuse 50a
• Left i/p fuse block
• Lock relay
• Locks fuse 20a
• Lt doors circuit breaker 25a
• Lumbar bolster switch (front passenger)
• M c4
• Mbec 1 fuse 50a
• Memory seat module
• Park lp relay
• Pcm 1 fuse 15a
• Pdm fuse 10a
• Pnk
• Powertrain control module
• Red
• Right i/p fuse block (lower right side of dash)
• Rt door circuit breaker 25a
• S102
• S328
• Sba fuse 15a
• Seat adjuster switch (driver)
• Seat adjuster switch (front passenger)
• Seat circuit breaker 30a
• Tbc 2a fuse 15a
• Tbc 2b fuse 15a
• Tbc 2c fuse 15a
• Throttle actuator control module (8.1l)
• To ign 1 relay (diagram 3 of 6)
• To inj 1 fuse (diagram 4 of 6)
• 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)

6.0L VIN U, Power Distribution Wiring Diagram (4 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.0L VIN U, Power Distribution Wiring Diagram (4 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004:

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

6.0L VIN U, Power Distribution Wiring Diagram (5 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.0L VIN U, Power Distribution Wiring Diagram (5 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (auto a/c)
• (man a/c)
• (not used)
• (over 8600 gvw) (under 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
• Exc m74 transmission
• F10
• From ign a fuse (diagram 1 of 6)
• Front axle actuator
• Htr/ac fuse 30a
• Hvac 1 fuse 10a
• Hvac control module
• Ign 0 fuse 10a
• Ign 3 fuse 10a
• Ignition switch
• Left i/p fuse block (lower left side of dash)
• Lock
• Mode actuator
• Off
• Pnk
• Power takeoff (pto) switch
• Powertrain control module
• Pto
• Rear wheel steering control module
• Recirculation actuator
• Red
• Right i/p fuse block (lower right side of dash)
• Run
• Start
• Steering wheel speed/ position sensor
• Stoplamp switch
• Tbc ign 0 fuse 10a
• To auxiliary battery relay (diagram 1 of 6)
• Tranmission control module
• Transfer case shift control switch
• Turn signal multifunction switch
• Underhood fuse block (left side of engine compt)

6.0L VIN U, Power Distribution Wiring Diagram (6 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.0L VIN U, Power Distribution Wiring Diagram (6 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (left side of engine compt) underhood fuse block
• (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
• Exc 8.l w/o california lev
• F11
• From ign b fuse (diagram 1 of 6)
• Fuse block mobile radio (upfitter option)
• Heated oxygen sensor bank 1 sensor 1
• Heated oxygen sensor bank 1 sensor 2
• Heated oxygen sensor bank 2 sensor 1
• Heated oxygen sensor bank 2 sensor 2
• I/p relay block (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
• Nca
• O2a fuse 15a
• O2b fuse 15a
• 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
• To ign 1 relay (diagram 3 of 6)
• Turn signal/ multifunction switch
• W/o 8s8
• Windshield wiper motor module
• Ws wpr fuse 25a

6.6L VIN 1

6.6L VIN 1, Power Distribution Wiring Diagram (1 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

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

• (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
• Glow plug relay
• Glow plug/ intake heater relay assembly
• 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
• Intake air heater relay
• 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
• 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 1, Power Distribution Wiring Diagram (2 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

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

• (auto a/c) (man a/c)
• (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
• Ecu 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)
• In i/p harness) s335
• 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 1, Power Distribution Wiring Diagram (3 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.6L VIN 1, Power Distribution Wiring Diagram (3 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (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 valve solenoid
• Egr valve throttle valve solenoid
• Egr valve vent 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
• Glow plug controller
• Hdlp-hi relay
• Hdlp-low relay
• Horn relay
• I/p relay block (near left kick panel)
• Intake air heater relay
• 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
• S173
• 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 1, Power Distribution Wiring Diagram (4 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.6L VIN 1, Power Distribution Wiring Diagram (4 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (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 1, Power Distribution Wiring Diagram (5 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

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

• (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

6.6L VIN 2

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

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

• (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 Chevrolet Cab & Chassis Silverado 3500 2004

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

• (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 Chevrolet Cab & Chassis Silverado 3500 2004

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

• (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 Chevrolet Cab & Chassis Silverado 3500 2004

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

• (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 Chevrolet Cab & Chassis Silverado 3500 2004

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

• (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

8.1L VIN G

8.1L VIN G, Power Distribution Wiring Diagram (1 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 8.1L VIN G, Power Distribution Wiring Diagram (1 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (base) (exc base)
• (in seo harness)
• (not used)
• 4ws fuse 15a
• A c7
• A12
• Abs fuse 60a
• Audio amplifier
• Aux batt fuse 40a
• Auxiliary battery relay (right rear of engine compt)
• B c9
• B11 c1
• B12 c1
• B2 c3
• Battery (left)
• Battery (right)
• Battery (right) (w/aux battery)
• 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
• From 4wd fuse (diagram 5 of 6)
• Fuse holder
• Fusible link
• G104 (left rear of engine block)
• G200 (behind right side of dash, near "a" pillar)
• Generator (left)
• Generator (right)
• 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
• S102
• 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 5 of 6)
• To ignition switch (diagram 6 of 6)
• To ipc/dic fuse (diagram 2 of 6)
• Trailer connector
• Underhood fuse block (left side of engine compt)
• Underhood junction block
• Upfitter option
• Vses/ ecas fuse 60a
• W/aux battery
• W/dual batteries
• Wrecker relay

8.1L VIN G, Power Distribution Wiring Diagram (2 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 8.1L VIN G, Power Distribution Wiring Diagram (2 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (auto a/c) (man a/c)
• (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
• Except luxury
• F/pmp relay
• From radio fuse (diagram 1 of 6)
• G200 (behind right side of dash, near "a" pillar)
• Garage door opener
• Hvac control module
• Hvac/ecas fuse 10a
• I/p relay block (left of steering column)
• I/p relay block (near left kick panel)
• In i/p harness) s335
• Info fuse 15a
• Instrument panel cluster
• Ipc/dic fuse 10a
• Lh hid fuse 20a
• Luxury
• Nca
• Overhead console
• Pcm b fuse 20a
• Powertrain control module
• Rear seat entertainment assembly
• Red
• Remote playback device (cd player)
• Rh hid fuse 20a
• Right i/p fuse block (lower right side of dash)
• Roof beacon relay
• Roof beacon switch
• Rr defog fuse 30a
• Rr hvac fuse 30a
• Seo b1 fuse 15a
• Seo b2 fuse 30a
• Stop lp fuse 25a
• Stoplamp switch
• To lbec 1 fuse (diagram 3 of 6)
• Transfer case encoder motor
• Transfer case shift control module
• Transmission control module
• Trec fuse 30a
• Underhood fuse block (left side of engine compt)
• Vehicle communication interface module
• W/o 8s8

8.1L VIN G, Power Distribution Wiring Diagram (3 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 8.1L VIN G, Power Distribution Wiring Diagram (3 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (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
• B10
• B12
• B7 c2
• Body control module
• C c3
• C9 c1
• Ddm fuse 15a
• Driver door module
• Driver door unlock relay
• Drl fuse 10a
• Drl relay
• E c10
• E c7
• E10
• E11 c1
• E12
• E3 c3
• Ecc fuse 10a
• Etc/ecm fuse 15a
• Evaporative emissions (evap) canister purge solenoid
• Exc base
• F c3
• Flash fuse 25a
• Fog lp fuse 15a
• Fog lp relay
• From mbec 1 fuse (diagram 3 of 6)
• From pcm b fuse (diagram 2 of 6)
• From seo ign fuse (diagram 6 of 6)
• Front passenger door module
• Fuel composition sensor
• Fuel pump relay (secondary)
• G c4
• G104 (left rear of engine block)
• Hdlp-hi relay
• Hdlp-low relay
• Horn relay
• I/p relay block (near left kick panel)
• Ign 1 relay
• Intake air temperature (iat)/mass airflow (maf) sensor assembly
• Lbec 1 fuse 50a
• Lbec 2 fuse 50a
• Left i/p fuse block
• Lock relay
• Locks fuse 20a
• Lt doors circuit breaker 25a
• Lumbar bolster switch (front passenger)
• M c4
• Mbec 1 fuse 50a
• Memory seat module
• Park lp relay
• Pcm 1 fuse 15a
• Pdm fuse 10a
• Pnk
• Powertrain control module
• Red
• Right i/p fuse block (lower right side of dash)
• Rt door circuit breaker 25a
• S102
• S328
• Sba fuse 15a
• Seat adjuster switch (driver)
• Seat adjuster switch (front passenger)
• Seat circuit breaker 30a
• Tbc 2a fuse 15a
• Tbc 2b fuse 15a
• Tbc 2c fuse 15a
• Throttle actuator control module (8.1l)
• To ign 1 relay (diagram 3 of 6)
• To inj 1 fuse (diagram 4 of 6)
• 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)

8.1L VIN G, Power Distribution Wiring Diagram (4 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 8.1L VIN G, Power Distribution Wiring Diagram (4 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004:

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

8.1L VIN G, Power Distribution Wiring Diagram (5 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 8.1L VIN G, Power Distribution Wiring Diagram (5 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (auto a/c)
• (man a/c)
• (not used)
• (over 8600 gvw) (under 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
• Exc m74 transmission
• F10
• From ign a fuse (diagram 1 of 6)
• Front axle actuator
• Htr/ac fuse 30a
• Hvac 1 fuse 10a
• Hvac control module
• Ign 0 fuse 10a
• Ign 3 fuse 10a
• Ignition switch
• Left i/p fuse block (lower left side of dash)
• Lock
• Mode actuator
• Off
• Pnk
• Power takeoff (pto) switch
• Powertrain control module
• Pto
• Rear wheel steering control module
• Recirculation actuator
• Red
• Right i/p fuse block (lower right side of dash)
• Run
• Start
• Steering wheel speed/ position sensor
• Stoplamp switch
• Tbc ign 0 fuse 10a
• To auxiliary battery relay (diagram 1 of 6)
• Tranmission control module
• Transfer case shift control switch
• Turn signal multifunction switch
• Underhood fuse block (left side of engine compt)

8.1L VIN G, Power Distribution Wiring Diagram (6 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 8.1L VIN G, Power Distribution Wiring Diagram (6 of 6) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (left side of engine compt) underhood fuse block
• (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
• Exc 8.l w/o california lev
• F11
• From ign b fuse (diagram 1 of 6)
• Fuse block mobile radio (upfitter option)
• Heated oxygen sensor bank 1 sensor 1
• Heated oxygen sensor bank 1 sensor 2
• Heated oxygen sensor bank 2 sensor 1
• Heated oxygen sensor bank 2 sensor 2
• I/p relay block (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
• Nca
• O2a fuse 15a
• O2b fuse 15a
• 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
• To ign 1 relay (diagram 3 of 6)
• Turn signal/ multifunction switch
• W/o 8s8
• Windshield wiper motor module
• Ws wpr fuse 25a