ENGINE PERFORMANCE – Chevrolet Cab & Chassis Silverado 3500 2004 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

6.0L VIN U

6.0L VIN U, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.0L VIN U, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004:

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

6.0L VIN U, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.0L VIN U, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004:

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

6.0L VIN U, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.0L VIN U, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004:

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

6.0L VIN U, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.0L VIN U, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004:

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

6.0L VIN U, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

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

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

6.6L VIN 1

6.6L VIN 1, Engine Performance Wiring Diagram, California (1 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

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

• (right side of engine) g102
• 12v ref
• 5v ref
• App sens sig
• Batt
• Battery
• Body control module (left side of dash)
• Can high
• Can low
• Ccp sw sig
• Ckp signal
• Class 2 data
• Cmp sig
• Cool lev sig
• Coolant level switch (in coolant reservoir)
• Crank fuse 10a
• Crank volt
• Crankshaft position sensor (right side of engine)
• Cruise control system
• Cruise system
• Data link connector (under left side of dash)
• E11
• Ecm1 fuse 15a
• Ect 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)
• Ficm rly ctrl
• G103 (right rear of engine)
• G104 (lower left side of engine)
• G108 (lower left side of engine)
• Ground
• Hot in off, run & start
• Hot in run & start
• Hot in start
• Htr rly ctrl
• Ia htr sply
• Ign 0 fuse 10a c1
• Ign 1
• Ind ctrl
• Inj 1 ctrl
• Inj 2 ctrl
• Inj 3 ctrl
• Inj 4 ctrl
• Inj 5 ctrl
• Inj 6 ctrl
• Inj 7 ctrl
• Inj 8 ctrl
• Left i/p fuse block
• Lev sw sig
• Low ref
• Off/run/crk
• P/n sig
• Park/neutral position switch
• Plug sig
• Pnk
• Pto enable
• Res/acc sig
• S103
• S120
• S177
• Set/coast sig
• Splice pack sp205 (in i/p harness)
• Sply volt
• Starting system
• Tan
• Turn on sig
• Under- hood fuse block
• Vacuum sensor
• Vacuum sig
• Water in fuel sensor (on fuel filter element)

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

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

• (lower left side of engine)
• Accelerator pedal position sensor (behind accelerator pedal)
• App 1
• App 2
• App 3
• Battery
• Battery fuse 175a
• Camshaft position sensor (front of engine)
• Ecmprv fuse 15a
• Edu relay
• F1 c2
• Fuel heater (top of fuel filter element)
• Fuel ht fuse 15a
• Fuel pump (auxiliary tank (left side frame rail)
• Fuel pump relay
• Fuse holder
• Fusible link
• G102 (right side of engine)
• G108
• G109 (left side of engine)
• G110 (left front body mount)
• G403 (left rear body mount)
• Glow plug controller
• Glow plugs
• Ground
• Hot at all times
• Hot in run & start
• Ign 1
• Intake air heater
• Intake air heater relay
• Nca
• Pcmb fuse 20a
• Plug 1 v+
• Plug 2 v+
• Plug 3 v+
• Plug 4 v+
• Plug 5 v+
• Plug 6 v+
• Plug 7 v+
• Plug 8 v+
• Plug sig
• Pnk
• Red
• Relay ctrl
• S102
• S173
• S174
• S175
• Series
• Tan
• Underhood fuse block

6.6L VIN 1, Engine Performance Wiring Diagram, California (3 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

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

• (engine harn)
• (left side of engine)
• (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)
• C12
• Can hi
• Can low
• Engine spd
• Fuel injector control module (under air intake duct)
• Fuel injectors
• G103
• G109
• Ground
• Hot in run & start
• Ign
• Ign 2,3,5,8
• Ign pos
• 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
• Pnk
• Red
• S118
• S119
• S166
• S167
• S168
• S169
• Tan
• Underhood fuse block

6.6L VIN 1, Engine Performance Wiring Diagram, California (4 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

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

• (in engine harness)
• (in i/p harness)
• (right "a" pillar) g200
• Baro sensor (left side of engine)
• Boost sensor (right side of engine)
• Cruise control system
• Cruise fuse 10a
• Ecm1 fuse 15a
• Fog lp fuse 15a
• Fuel pressure sensor (top left side of engine)
• Hot in run
• Hot in run & start
• Ind logic
• Intake air temperature (iat)/ mass airflow (maf) sensor (in air induction tube)
• Interior lights system
• Left i/p fuse block
• Off
• Pnk
• Power take off relay (underhood fuse block bracket)
• Power take off switch
• Red
• S161
• S163
• S176
• S205
• Set
• Tan
• Transmission control module (left front of engine compt)
• Underhood fuse block

6.6L VIN 1, Engine Performance Wiring Diagram, California (5 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

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

• (a/t)
• (m/t)
• (right side of engine) g102
• 12 v ref
• 4wd low sig
• 5 volt ref
• A/c clu rly ctrl
• A/c hi pres sig
• A/c low sw sig
• A/c req sig
• A/c system
• Anti-lock brakes system
• App sens 1 sig
• App sens 3 sig
• Axle sw sig
• B11
• Baro sens sig
• Body relay block
• Boost sens sig
• Brake fuse 10a
• C12
• Charge ind ctrl
• Chmsl sply
• Clutch pedal position switch (top of pedal bracket)
• Cruise control system
• Cruise on sw sig
• Egr sol ctrl
• Egr throttle ctrl
• Egr throttle valve vacuum control solenoid
• Egr vacuum vent solenoid
• Egr valve vacuum control solenoid
• Egr vent ctrl
• Eng spd sig
• Engine control module (left front of engine compt)
• Engine speed sig
• Exc seo
• Exterior lights system
• F pmp rly ctrl
• F/d cycle sig
• Fp sens sig
• Front sig hi (a/t)
• Fuel lev sens sig
• Fuel pres reg
• Fuel rail pressure regulator (on fuel rail)
• Fuel temp sig
• Fuel temperature sensor
• Glow rly ctrl
• Ground
• Hot at all times
• Hot in run
• Hot in run & start
• Ia htr diag 2
• Iat sens sig
• Ign 1 volt
• Ign1 fuse 10a
• Ind ctrl
• Instrument cluster system
• Instrument cluster system (fuel level)
• Instrument panel cluster
• Ipc/dic fuse 10a
• Left i/p fuse block
• Low ref
• Maf sens sig
• Mil
• Mil ctrl
• Pnk
• Pnk b
• Pto eng disable
• Pto engage sig
• Pto feedback
• Recirc door ctrl
• Red
• Rpm out
• S178
• S179
• Seo
• Seob1 fuse 10a
• Sol ctrl
• Starting/charging system
• Stop- lamp switch (top of brake pedal bracket)
• Tan
• Tcc brake rel sig
• Tcm mil req
• Transmissions system
• Underhood fuse block
• Vehicle speed sensor (left side of trans)
• Vss hi sig (m/t)
• Vss lo sig (m/t)
• Vss sig
• Wait to start

6.6L VIN 1, Engine Performance Wiring Diagram, Except California (1 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.6L VIN 1, Engine Performance Wiring Diagram, Except California (1 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (right side of engine) g102
• 12v ref
• 5v ref
• App sens sig
• Batt
• Battery
• Body control module (left side of dash)
• Can high
• Can low
• Ccp sw sig
• Ckp signal
• Class 2 data
• Cmp sig
• Cool lev sig
• Coolant level switch (in coolant reservoir)
• Crank fuse 10a
• Crank volt
• Crankshaft position sensor (right side of engine)
• Cruise control system
• Cruise system
• Data link connector (under left side of dash)
• E11
• Ecm1 fuse 15a
• Ect 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)
• Ficm rly ctrl
• G103 (right rear of engine)
• G104 (lower left side of engine)
• G108 (lower left side of engine)
• Ground
• Hot in off, run & start
• Hot in run & start
• Hot in start
• Htr rly ctrl
• Ia htr sply
• Ign 0 fuse 10a c1
• Ign 1
• Ind ctrl
• Inj 1 ctrl
• Inj 2 ctrl
• Inj 3 ctrl
• Inj 4 ctrl
• Inj 5 ctrl
• Inj 6 ctrl
• Inj 7 ctrl
• Inj 8 ctrl
• Left i/p fuse block
• Lev sw sig
• Low ref
• Off/run/crk
• P/n sig
• Park/neutral position switch
• Plug sig
• Pnk
• Pto enable
• Res/acc sig
• S103
• S120
• Set/coast sig
• Splice pack sp205 (in i/p harness)
• Sply volt
• Starting system
• Tan
• Turn on sig
• Under- hood fuse block
• Water in fuel sensor (on fuel filter element)

6.6L VIN 1, Engine Performance Wiring Diagram, Except California (2 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.6L VIN 1, Engine Performance Wiring Diagram, Except California (2 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004:

• Accelerator pedal position sensor (behind accelerator pedal)
• App 1
• App 2
• App 3
• Battery fuse 175a
• Camshaft position sensor (front of engine)
• Ecmprv fuse 15a
• Edu relay
• F1 c2
• Fuel heater (top of fuel filter element)
• Fuel ht fuse 15a
• Fuel pump (auxiliary tank (left side frame rail)
• Fuel pump relay
• Fuse holder
• G102 (right side of engine)
• G104 (lower left side of engine)
• G109 (left side of engine)
• G110 (left front body mount)
• G403 (left rear body mount)
• Glow plug relay
• Glow plug/ intake heater relay assembly
• Glow plugs
• Hot at all times
• Hot in run & start
• Intake air heater
• Intake air heater relay
• Nca
• Pcmb fuse 20a
• Pnk
• Red
• S102
• S175
• Series
• Tan
• Underhood fuse block

6.6L VIN 1, Engine Performance Wiring Diagram, Except California (3 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.6L VIN 1, Engine Performance Wiring Diagram, Except California (3 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (engine harn)
• (left side of engine)
• (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)
• C12
• Can hi
• Can low
• Engine spd
• Fuel injector control module (under air intake duct)
• Fuel injectors
• G103
• G109
• Ground
• Hot in run & start
• Ign
• Ign 2,3,5,8
• Ign pos
• 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
• Pnk
• Red
• S118
• S119
• S166
• S167
• S168
• S169
• Tan
• Underhood fuse block

6.6L VIN 1, Engine Performance Wiring Diagram, Except California (4 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.6L VIN 1, Engine Performance Wiring Diagram, Except California (4 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (in engine harness)
• (in i/p harness)
• (right "a" pillar) g200
• Baro sensor (left side of engine)
• Boost sensor (right side of engine)
• Cruise control system
• Cruise fuse 10a
• Ecm1 fuse 15a
• Fog lp fuse 15a
• Fuel pressure sensor (top left side of engine)
• Hot in run
• Hot in run & start
• Ind logic
• Intake air temperature (iat)/ mass airflow (maf) sensor (in air induction tube)
• Interior lights system
• Left i/p fuse block
• Off
• Pnk
• Power take off relay (underhood fuse block bracket)
• Power take off switch
• Red
• S161
• S163
• S205
• Set
• Tan
• Transmission control module (left front of engine compt)
• Underhood fuse block

6.6L VIN 1, Engine Performance Wiring Diagram, Except California (5 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 6.6L VIN 1, Engine Performance Wiring Diagram, Except California (5 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (a/t)
• (m/t)
• (right side of engine) g102
• 12 v ref
• 4wd low sig
• 5 volt ref
• A/c clu rly ctrl
• A/c hi pres sig
• A/c low sw sig
• A/c req sig
• A/c system
• Anti-lock brakes system
• App sens 1 sig
• App sens 3 sig
• Axle sw sig
• B11
• Baro sens sig
• Body relay block
• Boost sens sig
• Brake fuse 10a
• C12
• Charge ind ctrl
• Chmsl sply
• Clutch pedal position switch (top of pedal bracket)
• Cruise control system
• Cruise on sw sig
• Eng spd sig
• Engine control module (left front of engine compt)
• Engine speed sig
• Exc seo
• Exterior lights system
• F pmp rly ctrl
• F/d cycle sig
• Fp sens sig
• Front sig hi (a/t)
• Fuel lev sens sig
• Fuel pres reg
• Fuel rail pressure regulator (on fuel rail)
• Fuel temp sig
• Fuel temperature sensor
• Glow rly ctrl
• Ground
• Hot at all times
• Hot in run
• Hot in run & start
• Ia htr diag 2
• Iat sens sig
• Ign 1 volt
• Ign1 fuse 10a
• Ind ctrl
• Instrument cluster system
• Instrument cluster system (fuel level)
• Instrument panel cluster
• Ipc/dic fuse 10a
• Left i/p fuse block
• Low ref
• Maf sens sig
• Mil
• Mil ctrl
• Pnk
• Pto eng disable
• Pto engage sig
• Pto feedback
• Recirc door ctrl
• Red
• Rpm out
• Seo
• Seob1 fuse 10a
• Sol ctrl
• Starting/charging system
• Stop- lamp switch (top of brake pedal bracket)
• Tan
• Tcc brake rel sig
• Tcm mil req
• Transmissions system
• Underhood fuse block
• Vehicle speed sensor (left side of trans)
• Vss hi sig (m/t)
• Vss lo sig (m/t)
• Vss sig
• Wait to start

6.6L VIN 2

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

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

• (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 Chevrolet Cab & Chassis Silverado 3500 2004

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

• 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 Chevrolet Cab & Chassis Silverado 3500 2004

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

• (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 Chevrolet Cab & Chassis Silverado 3500 2004

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

• (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 Chevrolet Cab & Chassis Silverado 3500 2004

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

• (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 Chevrolet Cab & Chassis Silverado 3500 2004

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

• (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

8.1L VIN G

8.1L VIN G, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 8.1L VIN G, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (below steering column) data link connector
• (in injector jumper harness)
• (top left rear of engine) crankshaft position (ckp) sensor
• +5v
• A/c system
• Anti-lock brakes sys
• Body control module (below steering column)
• Brk sw sig
• Ckp sig
• Cls 2 data
• Cmp sig
• Cpp sw sig
• D10
• E11
• Ect sig
• G103 (right rear of engine)
• Gnd
• Ho2s hi sig
• Ho2s lo
• Hot at all times
• Hot in accy, run & start
• Hot in run & start
• Ign
• Ign 0 fuse 10a
• Inj 1 ctrl
• Inj 2 ctrl
• Inj 3 ctrl
• Inj 4 ctrl
• Inj 5 ctrl
• Inj 6 ctrl
• Inj 7 ctrl
• Inj 8 ctrl
• Inj1 fuse 15a
• Inj2 fuse 15a
• Injectors
• Ks signal
• Left i/p fuse block
• Lev sw sig
• O2a fuse 15a
• O2b fuse 15a
• Oil lev sw sig
• P/n sig
• Pcmb fuse 20a
• Pnk
• Pnk a
• Powertrain control module (pcm) (left front of engine compt)
• Pto enable sw
• Pto eng kill
• Pto engage
• Pto status
• Ref low
• Req torq sig
• Rly ctrl
• S103
• S110
• S152
• S154
• Serial data
• Sp205 (in i/p harness)
• Starting/ charging system
• Tan
• Under- hood fuse block

8.1L VIN G, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 8.1L VIN G, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (dual tanks)
• (in secondary fuel tank) fuel pump & sender assembly (secondary)
• (left rear of engine) g104
• (right rear of engine)
• Coolant level switch (in coolant reservoir)
• Engine coolant temperature sensor (middle of right cylinder head)
• Engine oil level switch (right side of oil pan)
• Fuel pump & sender assembly (primary) (in fuel tank)
• Fuel pump relay
• Fuel pump relay (secondary) (dual tanks) (on underhood fuse block bracket)
• G103
• G103 (right rear of engine)
• G104 (left rear of engine)
• G110 (left front body mount)
• Heated oxygen sensor (bank 1 sensor 1) (left exh pipe, before converter)
• Heated oxygen sensor (bank 1 sensor 2) (left exh pipe, after converter)
• Heated oxygen sensor (bank 2 sensor 1) (right exh pipe, before converter)
• Heated oxygen sensor (bank 2 sensor 2) (right exh pipe, after converter)
• Hot at all times
• Hot in run & start
• Knock sensor bank 1 (forward of oil filter)
• Knock sensor bank 2 (forward of starter)
• Nca
• Park/neutral position switch (left side of transmission)
• Pcm b fuse 20a
• Pcm1 fuse 15a
• Pnk
• S102
• S103
• Tan
• Underhood fuse block

8.1L VIN G, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 8.1L VIN G, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (in engine harness) s163
• (in i/p harness)
• (right "a" pillar) g200
• Brake fuse 10a
• C12
• Camshaft position sensor (left side of timing cover)
• Cruise control system
• Cruise fuse 10a
• Engine oil pressure (eop) sensor (top rear of engine)
• Evaporative emissions (evap) canister purge solenoid (left side of throttle body)
• Evaporative emissions canister vent solenoid (right front side of fuel tank)
• F12
• Fog lp fuse 15a
• Fuel tank pressure sensor (in fuel tank)
• Hot at all times
• Hot in run
• Ind logic
• Instrument cluster system
• Interior lights system
• Left i/p fuse block
• Manifold absolute pressure sensor (top rear of engine)
• Off
• Pnk
• Pnk a
• Power take off relay (underhood fuse block bracket)
• Power take off switch
• Red
• S150
• S161
• S164
• S205
• Set
• Stop lps fuse 20a
• Stop- lamp switch (top of brake pedal bracket)
• Tan
• Transmissions system
• Under- hood fuse block
• Underhood fuse block
• Vehicle speed sensor (left rear of transmission/ transfer case)

8.1L VIN G, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

List of elements for 8.1L VIN G, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004:

• (behind accelerator pedal) accelerator pedal position sensor
• 4ws fuse 15a
• A10
• Act cntrl
• App sens 1
• App sens 2
• Cruise control system
• Cruise req
• Data
• Ect/ecm fuse 15a
• G103 (right rear of engine)
• G104 (left rear of engine)
• Gnd
• Ground
• Hot at all times
• Hot in run or start
• Iat sensor
• Ign
• Intake air temperature (iat)/ mass airflow (maf) sensor (in air induction tube)
• Left i/p fuse block
• Not used
• Pnk
• R/a input
• Red
• Ref low
• S/c input
• S102
• S103
• S312
• Signal
• Stp lp in
• Tac ctrl
• Tan
• Throttle actuator control module (left rear of engine compt)
• Throttle body
• Tp sens 1
• Tp sens 2
• Underhood fuse block
• Veh stop fuse 15a

8.1L VIN G, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Cab & Chassis Silverado 3500 2004

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

• (in engine harness)
• (in ignition coil jumper harness)
• (in injector jumper harness)
• (left side of engine) g102
• 400 (or 821)
• 4wd low sig
• A/c system
• A/t
• A12
• Anti-lock brakes system
• Axle sw sig
• B10
• B11
• Clu rly ctrl
• Clutch sw
• Crank fuse 10a
• Crank volt
• Ctrl
• Delivered torq
• Evap canp ctrl
• Evap vent ctrl
• Exc seo
• Fuel lev sens
• Fuel lev sig
• Fuel press sig
• G103 (right rear of engine)
• Gen
• Gnd
• Ho2s htr low
• Ho2s low ctrl
• Hot at all times
• Hot in run & start
• Hot in start
• Iat sig
• Ign
• Ign ctrl
• Ign feed
• Ignition coils
• Ind ctrl
• Instrument cluster system
• Instrument panel cluster
• Ipc/dic fuse 10a
• Logic
• M/t
• Maf sig
• Malfunction indicator lamp
• Map sig
• Mil ctrl
• Mil request
• Nca
• Nca nca
• Pcm1 fuse 15a
• Pmp rly ctrl
• Pnk
• Pnk d
• Powertrain control module (pcm) (left front of engine compt)
• Press sens sig
• Red
• Red c
• Ref lo
• Ref low
• Rpm out
• S103
• S151
• S153
• S157
• S159
• S160
• Seo
• Seo b1 fuse 15a
• Spark plug
• Starting system
• Starting/charging system
• Tan
• Torque sig
• Trans- mission control module
• Transmissions system
• Under- hood fuse block
• Vss high sig
• Vss low sig
• Vss out