POWER DISTRIBUTION – Chevrolet Silverado 1500 2003 – SYSTEM WIRING DIAGRAMS – Wiring diagrams for cars (2024)

POWER DISTRIBUTION

4.3L VIN X

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

4.8L VIN V

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

5.3L VIN T

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

6.0L VIN U

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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