ENGINE PERFORMANCE – Chevrolet Chevy Express G3500 2001 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.3L

4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G3500 2001

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G3500 2001:

• (i/p harn, 6 cm from park brake breakout)
• (lower front of engine, near crankshaft) crankshaft position sensor
• (near thermostat housing) g125
• (top rear of engine)
• (under left side of dash) data link connector
• 12v ref
• 3-2 shift sol
• 5v ref
• Battery
• Camshaft position sensor (part of distributor, rear top of engine)
• Ckp sens
• Class2 data
• Cmp sensor
• Ecm-b fuse 20a
• Ect sensor
• Egr gnd
• Egr valve
• Eng-1 k7
• Engine coolant temperature gauge sensor (on left cylinder head, between two front spark plugs)
• F11
• Fuse 20a l8
• G117 (right rear of engine)
• G12
• Ground
• Heated oxygen sensor bank 1 sensor 1 (in exhaust pipe in front of catalytic converter)
• Heated oxygen sensor bank 1 sensor 2 (in exhaust pipe in back of catalytic converter)
• Heated oxygen sensor bank 2 sensor 2 (w/ air injection reaction system) (in exhaust pipe in back of catalytic converter)
• Ho2s hi
• Ho2s low
• Hot at all times
• Hot in run or start
• Ign 1
• Inj 1
• Inj 2
• Inj 3
• Inj 4
• Inj 5
• Inj 6
• Knock sensor
• Ks sig
• Low ref
• Nca
• Off/run/crk
• Pnk
• Powertrain control module (on left inner fender)
• Red
• Red c
• S101
• S102
• S120
• S130
• S152
• S207
• Solid state
• Tan
• Tcc bk sw
• Trans pres b
• Trans pres c
• Trans sw a
• Trans sw b
• Trans sw p
• Underhood fuse block

4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G3500 2001

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G3500 2001:

• (w/4l60-e trans)
• (w/4l80-e trans)
• 1-2 shift solenoid
• 2-3 shift solenoid
• 3-2 shift solenoid
• A/t fluid pressure manual valve position switch
• Automatic transmission
• Ecm-1 fuse 20a
• Exhaust gas recirculation valve (top front of engine)
• Fluid temp sensor ground
• Fluid temp sensor signal
• Fuel inj 1
• Fuel inj 2
• Fuel inj 3
• Fuel inj 4
• Fuel inj 5
• Fuel inj 6
• Heated oxygen sensor bank 2 sensor 1 (in exhaust pipe in front of catalytic converter)
• Hot in run
• Hot in run or start
• I/p fuse block
• Ignition
• M4 brake fuse 18 10a n3
• Nca
• Pnk
• Pressure control solenoid valve
• Red
• S132
• S133
• S139
• S154 (engine harn, 97 cm from underhood fuse block)
• S210
• Tan
• Tcc pcm solenoid valve
• Tcc solenoid vlave
• Tcc/brake switch (behind dash, on brake pedal support)
• Underhood fuse block
• W/4l60-e 4-speed trans only

4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G3500 2001

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G3500 2001:

• (engine harn, 110 cm from underhood fuse block)
• (engine harn, left rear of engine compt)
• (i/p harn, 6 cm from power seat breakout)
• (left front of engine) g110
• 87a
• Air fuse 30a
• B14
• B17
• Fuel lvl input
• Fuel pump & sender (in fuel tank under rear of vehicle)
• Fuel pump relay
• Fuel tank pressure sensor (in fuel tank)
• G125 (near thermostat housing)
• Gauges fuse 4 10a
• Hot at all times
• Hot in off, run or start
• Hot in run or start
• I/p fuse block
• Input
• Instrument cluster
• Instrument cluster system
• Malfunction indicator lamp (mil) "service engine soon"
• Manifold absolute pressure sensor (top right side of engine)
• Mass airflow sensor (part of air intake duct, top front of engine)
• Odometer speedometer/
• Park/ neutral position switch
• Pnk
• Red
• S101
• S102
• S103
• S119
• S136
• S152
• S161
• S162
• S163
• S164
• S171
• S216
• S239
• Secondary air injection reaction pump clutch
• Secondary air injection reaction pump relay
• Secondary air injection reaction solenoid
• Sig in
• Sig out
• Throttle position sensor (on side of throttle body)
• Trans fuse 20 10a
• Underhood fuse block

4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G3500 2001

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G3500 2001:

• (left front of engine) g110
• (near thermostat housing) g125
• (top left side of engine)
• 1-2 shift
• 12v ref
• 2-3 shift
• A pnk
• A/c clutch
• A/c low
• A/c req
• A/c system
• Air pump
• Anti-lock brake system
• At iss hi
• At iss lo
• Automatic transmission input shaft speed sensor (w/4l80-e) (left side of transmission)
• Charge ind
• Cruise control system
• Cruise eng
• Distributor
• Eavp purge
• Egr sol
• Egr supp
• Evap vent
• Evaporative emission canister vent solenoid (on left frame rail, near fuel tank)
• Evaporative emissions canister purge solenoid valve (right side of engine)
• F pmp rly
• Fuel lev
• Gen f
• Gen to
• Ground
• High voltage coil wire
• Iac coil a
• Iac coil b
• Iat sens sig
• Ic timing
• Idle air control valve
• Ignition coil (top rear of engine)
• Ignition control module (top right side of engine, at ignition coil)
• Intake air temperature sensor (front of engine compartment, part of air intake duct)
• Low ref
• Maf sens
• Map sens
• Mil
• Pc sol
• Pnk
• Powertrain control module (on left inner fender)
• Pres sens
• Red
• S101
• S102
• Solid state
• Starting/charging system
• Tan
• Tan a
• Tcc pwm sol
• Tcc sol
• Tft sens
• Tp sens
• Trans a
• Trans c
• Vehicle speed sensor (left side of transmission)
• Vss
• Vss hi
• Vss low

5.0L

5.0L VIN M, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G3500 2001

List of elements for 5.0L VIN M, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G3500 2001:

• (i/p harn, 6 cm from park brake breakout)
• (lower front of engine, near crankshaft) crankshaft position sensor
• (near thermostat housing) g125
• (under left side of dash) data link connector
• 12v ref
• 3-2 shift sol
• 5v ref
• Battery
• Camshaft position sensor (part of distributor, rear top of engine)
• Ckp sens
• Class2 data
• Cmp sensor
• Computer data lines system
• Ecm-b fuse 20a
• Ect sensor
• Egr gnd
• Egr valve
• Eng-1 k7
• Engine coolant temperature gauge sensor (on left cylinder head, between two front spark plugs)
• F11
• Fuse 20a l8
• G117 (right rear of engine)
• G12
• Ground
• Heated oxygen sensor bank 1 sensor 1 (in exhaust pipe in front of catalytic converter)
• Heated oxygen sensor bank 1 sensor 2 (in exhaust pipe in back of catalytic converter)
• Heated oxygen sensor bank 2 sensor 2 (5.7l 0nly) (in exhaust pipe in back of catalytic converter)
• Ho2s hi
• Ho2s low
• Hot at all times
• Hot in run or start
• Ign 1
• Inj 1
• Inj 2
• Inj 3
• Inj 4
• Inj 5
• Inj 6
• Inj 7
• Inj 8
• Knock sensor (top rear of engine)
• Ks 1
• Low ref
• Nca
• Off/run/crk
• Pnk
• Powertrain control module (on left inner fender)
• Red
• Red c
• S101
• S102
• S120
• S130
• S152
• S207
• Solid state
• Tan
• Tcc bk sw
• Trans pres b
• Trans pres c
• Trans sw a
• Trans sw b
• Trans sw p
• Underhood fuse block
• W/ 4l60
• W/ 4l80

5.0L VIN M, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G3500 2001

List of elements for 5.0L VIN M, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G3500 2001:

• (w/4l60-e trans)
• (w/4l80-e trans)
• 1-2 shift solenoid
• 2-3 shift solenoid
• 3-2 shift solenoid
• A/t fluid pressure manual valve position switch
• Automatic transmission
• Ecm-1 fuse 20a
• Exhaust gas recirculation valve (top front of engine)
• Fluid temp sensor ground
• Fluid temp sensor signal
• Fuel inj 1
• Fuel inj 2
• Fuel inj 3
• Fuel inj 4
• Fuel inj 5
• Fuel inj 6
• Fuel inj 7
• Fuel inj 8
• Heated oxygen sensor bank 2 sensor 1 (in exhaust pipe in front of catalytic converter)
• Hot in run
• Hot in run or start
• I/p fuse block
• Ignition
• M4 brake fuse 18 10a n3
• Nca
• Pnk
• Pressure control solenoid valve
• Red
• S132
• S133
• S139
• S154 (engine harn, 97 cm from underhood fuse block)
• S210
• Tan
• Tcc pcm solenoid valve
• Tcc solenoid vlave
• Tcc/brake switch (behind dash, on brake pedal support)
• Underhood fuse block
• W/4l60-e 4-speed trans only

5.0L VIN M, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G3500 2001

List of elements for 5.0L VIN M, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G3500 2001:

• (engine harn, left rear of engine compt)
• (i/p harn, 6 cm from power seat breakout)
• (left front of engine) g110
• 87a
• Air fuse 30a
• B14
• B17
• Fuel lvl input
• Fuel pump & sender (in fuel tank under rear of vehicle)
• Fuel pump relay
• Fuel tank pressure sensor (in fuel tank)
• G125 (near thermostat housing)
• Gauges fuse 4 10a
• Hot at all times
• Hot in off, run or start
• Hot in run or start
• I/p fuse block
• Input
• Instrument cluster
• Instrument cluster system
• Malfunction indicator lamp (mil) "service engine soon"
• Manifold absolute pressure sensor (top right side of engine)
• Mass airflow sensor (part of air intake duct, top front of engine)
• Odometer speedometer/
• Park/ neutral position switch
• Pnk
• Red
• S101
• S102
• S103
• S119
• S152
• S161
• S162
• S163
• S164
• S165
• S171
• S216
• S239
• Secondary air injection reaction pump clutch
• Secondary air injection reaction pump relay
• Secondary air injection reaction solenoid
• Sig in
• Sig out
• Throttle position sensor (on side of throttle body)
• Trans fuse 20 10a
• Underhood fuse block

5.0L VIN M, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G3500 2001

List of elements for 5.0L VIN M, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G3500 2001:

• (left front of engine) g110
• (near thermostat housing) g125
• (top left side of engine)
• 1-2 shift
• 12v ref
• 2-3 shift
• A pnk
• A/c clutch
• A/c low
• A/c req
• A/c system
• Air pump
• Anti-lock brake system
• At iss hi
• At iss lo
• Automatic transmission input shaft speed sensor (w/4l80-e) (left side of transmission)
• Charge ind
• Cruise control system
• Cruise eng
• Distributor
• Eavp purge
• Egr sol
• Egr supp
• Evap vent
• Evaporative emission canister vent solenoid (on left frame rail, near fuel tank)
• Evaporative emissions canister purge solenoid valve (right side of engine)
• F pmp rly
• Fuel lev
• Gen f
• Gen to
• Ground
• High voltage coil wire
• Iac coil a
• Iac coil b
• Iat sens sig
• Ic timing
• Idle air control valve
• Ignition coil (top rear of engine)
• Ignition control module (top right side of engine, at ignition coil)
• Intake air temperature sensor (front of engine compartment, part of air intake duct)
• Low ref
• Maf sens
• Map sens
• Mil
• Pc sol
• Pnk
• Powertrain control module (on left inner fender)
• Pres sens
• Red
• S101
• S102
• Solid state
• Starting/charging system
• Tan
• Tan a
• Tcc pwm sol
• Tcc sol
• Tft sens
• Tp sens
• Trans a
• Trans c
• Vehicle speed sensor (left side of transmission)
• Vss
• Vss hi
• Vss low

5.7L

5.7L VIN R, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G3500 2001

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G3500 2001:

• (i/p harn, 6 cm from park brake breakout)
• (lower front of engine, near crankshaft) crankshaft position sensor
• (near thermostat housing) g125
• (under left side of dash) data link connector
• 12v ref
• 3-2 shift sol
• 5v ref
• Battery
• Camshaft position sensor (part of distributor, rear top of engine)
• Ckp sens
• Class2 data
• Cmp sensor
• Computer data lines system
• Ecm-b fuse 20a
• Ect sensor
• Egr gnd
• Egr valve
• Eng-1 k7
• Engine coolant temperature gauge sensor (on left cylinder head, between two front spark plugs)
• F11
• Fuse 20a l8
• G117 (right rear of engine)
• G12
• Ground
• Heated oxygen sensor bank 1 sensor 1 (in exhaust pipe in front of catalytic converter)
• Heated oxygen sensor bank 1 sensor 2 (in exhaust pipe in back of catalytic converter)
• Heated oxygen sensor bank 2 sensor 2 (5.7l 0nly) (in exhaust pipe in back of catalytic converter)
• Ho2s hi
• Ho2s low
• Hot at all times
• Hot in run or start
• Ign 1
• Inj 1
• Inj 2
• Inj 3
• Inj 4
• Inj 5
• Inj 6
• Inj 7
• Inj 8
• Knock sensor (top rear of engine)
• Ks 1
• Low ref
• Nca
• Off/run/crk
• Pnk
• Powertrain control module (on left inner fender)
• Red
• Red c
• S101
• S102
• S120
• S130
• S152
• S207
• Solid state
• Tan
• Tcc bk sw
• Trans pres b
• Trans pres c
• Trans sw a
• Trans sw b
• Trans sw p
• Underhood fuse block
• W/ 4l60
• W/ 4l80

5.7L VIN R, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G3500 2001

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G3500 2001:

• (w/4l60-e trans)
• (w/4l80-e trans)
• 1-2 shift solenoid
• 2-3 shift solenoid
• 3-2 shift solenoid
• A/t fluid pressure manual valve position switch
• Automatic transmission
• Ecm-1 fuse 20a
• Exhaust gas recirculation valve (top front of engine)
• Fluid temp sensor ground
• Fluid temp sensor signal
• Fuel inj 1
• Fuel inj 2
• Fuel inj 3
• Fuel inj 4
• Fuel inj 5
• Fuel inj 6
• Fuel inj 7
• Fuel inj 8
• Heated oxygen sensor bank 2 sensor 1 (in exhaust pipe in front of catalytic converter)
• Hot in run
• Hot in run or start
• I/p fuse block
• Ignition
• M4 brake fuse 18 10a n3
• Nca
• Pnk
• Pressure control solenoid valve
• Red
• S132
• S133
• S139
• S154 (engine harn, 97 cm from underhood fuse block)
• S210
• Tan
• Tcc pcm solenoid valve
• Tcc solenoid vlave
• Tcc/brake switch (behind dash, on brake pedal support)
• Underhood fuse block
• W/4l60-e 4-speed trans only

5.7L VIN R, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G3500 2001

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G3500 2001:

• (engine harn, left rear of engine compt)
• (i/p harn, 6 cm from power seat breakout)
• (left front of engine) g110
• 87a
• Air fuse 30a
• B14
• B17
• Fuel lvl input
• Fuel pump & sender (in fuel tank under rear of vehicle)
• Fuel pump relay
• Fuel tank pressure sensor (in fuel tank)
• G125 (near thermostat housing)
• Gauges fuse 4 10a
• Hot at all times
• Hot in off, run or start
• Hot in run or start
• I/p fuse block
• Input
• Instrument cluster
• Instrument cluster system
• Malfunction indicator lamp (mil) "service engine soon"
• Manifold absolute pressure sensor (top right side of engine)
• Mass airflow sensor (part of air intake duct, top front of engine)
• Odometer speedometer/
• Park/ neutral position switch
• Pnk
• Red
• S101
• S102
• S103
• S119
• S152
• S161
• S162
• S163
• S164
• S165
• S171
• S216
• S239
• Secondary air injection reaction pump clutch
• Secondary air injection reaction pump relay
• Secondary air injection reaction solenoid
• Sig in
• Sig out
• Throttle position sensor (on side of throttle body)
• Trans fuse 20 10a
• Underhood fuse block

5.7L VIN R, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G3500 2001

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G3500 2001:

• (left front of engine) g110
• (near thermostat housing) g125
• (top left side of engine)
• 1-2 shift
• 12v ref
• 2-3 shift
• A pnk
• A/c clutch
• A/c low
• A/c req
• A/c system
• Air pump
• Anti-lock brake system
• At iss hi
• At iss lo
• Automatic transmission input shaft speed sensor (w/4l80-e) (left side of transmission)
• Charge ind
• Cruise control system
• Cruise eng
• Distributor
• Eavp purge
• Egr sol
• Egr supp
• Evap vent
• Evaporative emission canister vent solenoid (on left frame rail, near fuel tank)
• Evaporative emissions canister purge solenoid valve (right side of engine)
• F pmp rly
• Fuel lev
• Gen f
• Gen to
• Ground
• High voltage coil wire
• Iac coil a
• Iac coil b
• Iat sens sig
• Ic timing
• Idle air control valve
• Ignition coil (top rear of engine)
• Ignition control module (top right side of engine, at ignition coil)
• Intake air temperature sensor (front of engine compartment, part of air intake duct)
• Low ref
• Maf sens
• Map sens
• Mil
• Pc sol
• Pnk
• Powertrain control module (on left inner fender)
• Pres sens
• Red
• S101
• S102
• Solid state
• Starting/charging system
• Tan
• Tan a
• Tcc pwm sol
• Tcc sol
• Tft sens
• Tp sens
• Trans a
• Trans c
• Vehicle speed sensor (left side of transmission)
• Vss
• Vss hi
• Vss low