ENGINE PERFORMANCE – Chevrolet Chevy Express G2500 2000 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.3L

4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G2500 2000

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G2500 2000:

• (on lower front of engine, near crankshaft) crankshaft position sensor
• (on right side of engine) evaporative emissions canister purge solenoid valve
• (on top left side of engine)
• Air pump rel cntrl
• Cam signal
• Camshaft position sensor (part of distributor, rear top of engine)
• Ckp sensor ground
• Ckp sensor signal
• Cmp sensor ground
• Coil a high
• Coil a low
• Coil b high
• Coil b low
• Egr sol posit signal
• Evap vent vlv sig
• Evaporative emission canister vent valve (on left frame rail, near fuel tank)
• Fuel lvl sig out
• Fuel tank press sens in
• G119 (engine harness at generator bracket)
• Heated oxygen sensor bank 1 sensor 1 (in exhaust pipe, in front of catalytic converter)
• Heated oxygen sensor bank 1 sensor 3 (in exhaust pipe, in front of catalytic converter)
• Heated oxygen sensor bank 2 sensor 1 (in exhaust pipe, in front of catalytic converter)
• Ho2s low
• Ho2s signal
• Idle air control valve
• Inj 1 ctrl
• Inj 2 ctrl
• Inj 3 ctrl
• Inj 4 ctrl
• Inj 5 ctrl
• Inj 6 ctrl
• Knock sens signal
• Knock sensor (on top rear of engine)
• Maf signal
• Map sens signal
• Nca
• Pnk
• Pnk a
• Pnk c
• S101
• S103
• S152
• Sensor signal
• Shift sol output (1/2)
• Shift sol output (2/3)
• Shift sol output (3/2)
• Signal
• Solid state
• Tan
• Tcc pwm sol ctrl
• Tcc solenoid output
• Trans temp sens signal
• Vehicle control module (vcm) (on left side of engine compartment)
• Vss signal high
• Vss signal low
• Vss signal output

4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G2500 2000

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G2500 2000:

• (4l60-e)
• (4l60-e) a b (4l80-e)
• (4l80-e)
• 1-2 shift sol valve
• 2-3 shift sol valve
• 3-2 shift sol valve
• 4l60-e
• Automatic transmission
• Automatic transmission fluid pressure (tfp) manual position switch
• B (4l60-e)
• D2 sw
• D3 sw
• D4 sw
• Eng1 fuse 20a
• Exhaust gas recirculation valve (on top front of engine)
• Fuel inj 1
• Fuel inj 2
• Fuel inj 3
• Fuel inj 4
• Fuel inj 5
• Fuel inj 6
• H7 ecm1 fuse 20a
• Heated oxygen sensor bank 2 sensor 2 (in exhaust pipe, in back of catalytic converter)
• Hot in run or start
• Lo sw
• Nca
• Pnk
• Pnk a c
• Pressure cntrl solenoid valve
• Red
• Rev sw
• S130
• S132
• S133
• Tan
• Tcc pwm sol valve
• Tcc sol valve
• Trans fluid temp sensor is not part of automatic trans fluid pressure (tfp) manual position switch with the 4l80-e transmission
• Trans fluid temp sensor
• Under hood fuse/relay center
• W/ air injection reaction system

4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G2500 2000

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G2500 2000:

• (engine harness at generator bracket) g119
• (engine harness, approx 111 cm from underhood fuse- relay center)
• (engine harness, approx 85 cm from underhood fuse- relay center)
• (engine harness, approx 91 cm from underhood fuse/ relay center)
• 87a
• Air fuse 30a
• B14
• B17
• Ecm-b fuse 20a
• Engine coolant temperature sensor (on top front of engine)
• F11
• Fuel lvl input
• Fuel pump & sender (in fuel tank under rear of vehicle)
• Fuel pump relay
• Fuel tank pressure sensor (in fuel tank)
• G102 (left side of engine compt, near fender well)
• G119 (engine harness, at generator bracket)
• G12
• Gauges fuse 4 10a
• Hot at all times
• Hot in off, run or start
• Hot in run or start
• I/p fuse block
• Instrument cluster
• Intake air temperature sensor (on front of engine compartment, part of air intake duct)
• Malfunction indicator lamp (mil) "service engine soon"
• Manifold absolute pressure sensor (on top right side of engine)
• Mass airflow sensor (part of air intake duct, top front of engine)
• Pnk
• Red
• S101
• S102
• S103
• S119
• S120
• S136
• S137
• S139
• S152
• S216
• Secondary air injection reaction pump clutch
• Secondary air injection reaction pump relay
• Secondary air injection solenoid
• Speedometer/ odometer input
• Tan
• Tan a
• Throttle position sensor (on side of throttle body)
• Trans fuse 20 10a
• Underhood fuse/relay center
• Vehicle speed sensor (on left side of transmission)

4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G2500 2000

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G2500 2000:

• (engine harn, 98 cm from underhood
• (engine harness at generator bracket) g119
• (engine harness, 4 cm from engine harn inline conn, left rear of engine compt) s153
• (engine harness, 7 cm from breakout to ground at generator bracket towards transmission)
• (i/p harness, approx 10 cm into radio breakout) s239
• (i/p harness, approx 18 cm from engine harn inline conn, left rear of eng compt)
• 5 volt reference
• 5 volts reference
• A pnk
• A/c com rel coil
• A/c compressor enable relay
• A/c request sig
• A/c signal
• Air conditioning system
• Automatic transmission input shaft speed sensor (left side of transmission)
• Battery
• Brake switch input
• Coil
• Cruise control module (on front of engine compartment, near left fender)
• Cruise ctrl sig-eng
• Data link connector (under left side of dash)
• Distributor
• Egr vlv ctrl
• Electronic brake control module (ebcm) (on left frame rail, near center of vehicle)
• Est control signal
• Evap driver
• Fuel pump rly ctrl
• Fuse/relay center) s154
• Ground
• High voltage coil wire
• Hot in run
• I/p fuse block
• Ignition
• Ignition coil (on top right side of engine)
• Ignition control module (on top right side of engine, at ignition coil)
• M4 brake fuse 18 10a n3
• Mal func ind out
• Passlock module (center of dash)
• Pnk
• Radio
• Red
• S101
• S122
• S207 (i/p harn, 6 cm from park brake warning switch breakout)
• S210
• S231
• Sensor ground
• Serial data
• Signal input
• Solid state
• Speed sensor input
• Stoplamp switch input
• Tcc signal
• Tcc/stoplamp switch (behind dash, on brake pedal support)
• Trans force mtr feed
• Trans force mtr rtn
• Trans range a input
• Trans range b input
• Trans range c input
• Underhood fuse/relay center
• Vcm signal
• Vehicle control module (on left side of engine compartment)
• Vss signal
• Vss signal output

5.0L

5.0L VIN M, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G2500 2000

List of elements for 5.0L VIN M, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G2500 2000:

• (lower front of engine, near crankshaft) crankshaft position sensor
• (right side of engine) evaporative emissions canister purge solenoid valve
• (top left side of engine) idle air control valve
• 1-2 shift sol
• 2-3 shift sol
• 4l60-e 4l80-e trans
• Air pump relay cntrl
• Camshaft position sensor (part of distributor, rear top of engine)
• Canister vet sig
• Ckp low
• Ckp sig
• Cmp return
• Cmp signal
• Coil a hi
• Coil b hi
• Css sig
• Ect sig
• Egr position signal
• Evaporative emission canister vent valve (on left frame rail, near fuel tank)
• Fuel inj 1
• Fuel inj 2
• Fuel inj 3
• Fuel inj 4
• Fuel inj 5
• Fuel inj 6
• Fuel inj 7
• Fuel inj 8
• Fuel lvl sig out
• Fuel tank press sig
• G110 (left front of engine)
• Heated oxygen sensor bank 1 sensor 1 (in exhaust pipe in front of catalytic converter)
• Heated oxygen sensor bank 1 sensor 3 (in exhaust pipe in front of catalytic converter)
• Heated oxygen sensor bank 2 sensor 2 (5.7l 0nly) (in exhaust pipe in back of catalytic converter)
• Ho2s low
• Ho2s signal
• Iac high
• Iac low
• Iat sig
• Knock sens signal
• Knock sensor (top rear of engine)
• Maf signal
• Map sens signal
• Nca
• Pnk
• Pnk c
• Pwm tcc sol output
• S101
• S152
• Shift solenoid output
• Solid state
• Tan
• Tcc sol output
• Temp sens signal
• Tp sig
• Trans
• Vehicle control module (vcm) (left side of engine compartment)
• Vehicle speed sensor (left side of transmission)
• Vss low
• Vss signal

5.0L VIN M, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G2500 2000

List of elements for 5.0L VIN M, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G2500 2000:

• (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
• Eng-1 k7
• 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
• Fuse 20a l8
• Heated oxygen sensor bank 2 sensor 1 (in exhaust pipe in front of catalytic converter)
• Hot in run or start
• Ignition
• Nca
• Pnk
• Pnk s130
• Pressure control solenoid valve
• Red
• S132
• S133
• Tan
• Tcc pcm solenoid valve
• Tcc solenoid vlave
• Underhood fuse/relay center
• W/4l60-e 4-speed trans only

5.0L VIN M, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G2500 2000

List of elements for 5.0L VIN M, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G2500 2000:

• (engine harn, approx 8 cm from ho2s sensor, bank 2 sensor 1) s136
• (engine harness, approx 85 cm from underhood fuse/relay center toward a/c compressor clutch breakout)
• (engine harness, approx 91 cm from underhood fuse/relay center toward a/c comp clutch breakout)
• (left front of engine) g110
• 87a
• Air fuse 30a
• B14
• B17
• Ecm-b fuse 20a
• Engine coolant temperature gauge sensor (on left cylinder head, between two front spark plugs)
• F11
• Fuel lvl input
• Fuel pump & sender (in fuel tank under rear of vehicle)
• Fuel pump relay
• Fuel tank pressure sensor (in fuel tank)
• G110 (left front of engine)
• G12
• 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
• Intake air temperature sensor (front of engine compartment, part of air intake duct)
• 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/
• Pnk
• Red
• S101
• S102
• S103
• S119
• S137
• S139
• S152
• S216
• Secondary air injection reaction pump clutch
• Secondary air injection reaction pump relay
• Secondary air injection reaction solenoid
• Sig in
• Sig out
• Tan
• Tan a
• Throttle position sensor (on side of throttle body)
• Trans fuse 20 10a
• Underhood fuse/relay center

5.0L VIN M, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G2500 2000

List of elements for 5.0L VIN M, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G2500 2000:

• (engine harness, 111 cm from underhood fuse/ relay center toward a/c comp clutch breakout)
• (engine harness, 98 cm from underhood fuse/ relay center toward a/c comp clutch breakout)
• (i/p harness, approx 10 cm into radio breakout)
• (i/p harness, approx 18 cm from engine sensors inline conn toward bulkhead)
• (left front of engine) g110
• 5 volt reference
• 5 volts reference
• A/c com rel ctrl
• A/c comp cycling sw
• A/c compressor enable relay
• A/c request sig
• Air conditioning system
• Automatic transmission input shaft speed sensor (w/4l80-e) (left side of transmission)
• Battery
• Brake switch input
• Coil
• Cruise control module (front of engine compartment near left fender)
• Cruise ctrl sig eng
• Cruise engaged output
• Data link connector (under left side of dash)
• Distributor
• Egr valve ctrl
• Electronic brake control module (ebcm) (left frame rail near center of vehicle)
• Evap driver
• Fuel lvl module
• Fuel pump rly feed
• Ground
• High voltage coil wire
• Hot in run
• I/p fuse block
• Ic cntrl
• Ignition
• Ignition coil (top rear of engine)
• Ignition control module (top right side of engine, at ignition coil)
• Inline conn toward breakout) s153
• Inpuit speed sens low
• Input speed sens high
• M4 brake fuse 18 10a n3
• Mal func lp output
• Pcs high
• Pcs low
• Pnk
• Pnk a
• Radio
• Range sig a
• Range sig b
• Range sig c
• Red
• S101
• S122
• S154
• S210
• S231
• S239
• Sensor ground
• Serial data
• Solid state
• Speed sensor input
• Stoplamp switch input
• Tcc signal
• Tcc/stoplamp switch (behind dash, on brake pedal support)
• Underhood fuse/relay center
• Vehicle control module (vcm) (left side of engine compartment)
• Vss signal
• Vss signal output

5.7L

5.7L VIN R, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G2500 2000

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G2500 2000:

• (lower front of engine, near crankshaft) crankshaft position sensor
• (right side of engine) evaporative emissions canister purge solenoid valve
• (top left side of engine) idle air control valve
• 1-2 shift sol
• 2-3 shift sol
• 4l60-e 4l80-e trans
• Air pump relay cntrl
• Camshaft position sensor (part of distributor, rear top of engine)
• Canister vet sig
• Ckp low
• Ckp sig
• Cmp return
• Cmp signal
• Coil a hi
• Coil b hi
• Css sig
• Ect sig
• Egr position signal
• Evaporative emission canister vent valve (on left frame rail, near fuel tank)
• Fuel inj 1
• Fuel inj 2
• Fuel inj 3
• Fuel inj 4
• Fuel inj 5
• Fuel inj 6
• Fuel inj 7
• Fuel inj 8
• Fuel lvl sig out
• Fuel tank press sig
• G110 (left front of engine)
• Heated oxygen sensor bank 1 sensor 1 (in exhaust pipe in front of catalytic converter)
• Heated oxygen sensor bank 1 sensor 3 (in exhaust pipe in front of catalytic converter)
• Heated oxygen sensor bank 2 sensor 2 (5.7l 0nly) (in exhaust pipe in back of catalytic converter)
• Ho2s low
• Ho2s signal
• Iac high
• Iac low
• Iat sig
• Knock sens signal
• Knock sensor (top rear of engine)
• Maf signal
• Map sens signal
• Nca
• Pnk
• Pnk c
• Pwm tcc sol output
• S101
• S152
• Shift solenoid output
• Solid state
• Tan
• Tcc sol output
• Temp sens signal
• Tp sig
• Trans
• Vehicle control module (vcm) (left side of engine compartment)
• Vehicle speed sensor (left side of transmission)
• Vss low
• Vss signal

5.7L VIN R, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G2500 2000

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G2500 2000:

• (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
• Eng-1 k7
• 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
• Fuse 20a l8
• Heated oxygen sensor bank 2 sensor 1 (in exhaust pipe in front of catalytic converter)
• Hot in run or start
• Ignition
• Nca
• Pnk
• Pnk s130
• Pressure control solenoid valve
• Red
• S132
• S133
• Tan
• Tcc pcm solenoid valve
• Tcc solenoid vlave
• Underhood fuse/relay center
• W/4l60-e 4-speed trans only

5.7L VIN R, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G2500 2000

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G2500 2000:

• (engine harn, approx 8 cm from ho2s sensor, bank 2 sensor 1) s136
• (engine harness, approx 85 cm from underhood fuse/relay center toward a/c compressor clutch breakout)
• (engine harness, approx 91 cm from underhood fuse/relay center toward a/c comp clutch breakout)
• (left front of engine) g110
• 87a
• Air fuse 30a
• B14
• B17
• Ecm-b fuse 20a
• Engine coolant temperature gauge sensor (on left cylinder head, between two front spark plugs)
• F11
• Fuel lvl input
• Fuel pump & sender (in fuel tank under rear of vehicle)
• Fuel pump relay
• Fuel tank pressure sensor (in fuel tank)
• G110 (left front of engine)
• G12
• 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
• Intake air temperature sensor (front of engine compartment, part of air intake duct)
• 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/
• Pnk
• Red
• S101
• S102
• S103
• S119
• S137
• S139
• S152
• S216
• Secondary air injection reaction pump clutch
• Secondary air injection reaction pump relay
• Secondary air injection reaction solenoid
• Sig in
• Sig out
• Tan
• Tan a
• Throttle position sensor (on side of throttle body)
• Trans fuse 20 10a
• Underhood fuse/relay center

5.7L VIN R, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G2500 2000

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G2500 2000:

• (engine harness, 111 cm from underhood fuse/ relay center toward a/c comp clutch breakout)
• (engine harness, 98 cm from underhood fuse/ relay center toward a/c comp clutch breakout)
• (i/p harness, approx 10 cm into radio breakout)
• (i/p harness, approx 18 cm from engine sensors inline conn toward bulkhead)
• (left front of engine) g110
• 5 volt reference
• 5 volts reference
• A/c com rel ctrl
• A/c comp cycling sw
• A/c compressor enable relay
• A/c request sig
• Air conditioning system
• Automatic transmission input shaft speed sensor (w/4l80-e) (left side of transmission)
• Battery
• Brake switch input
• Coil
• Cruise control module (front of engine compartment near left fender)
• Cruise ctrl sig eng
• Cruise engaged output
• Data link connector (under left side of dash)
• Distributor
• Egr valve ctrl
• Electronic brake control module (ebcm) (left frame rail near center of vehicle)
• Evap driver
• Fuel lvl module
• Fuel pump rly feed
• Ground
• High voltage coil wire
• Hot in run
• I/p fuse block
• Ic cntrl
• Ignition
• Ignition coil (top rear of engine)
• Ignition control module (top right side of engine, at ignition coil)
• Inline conn toward breakout) s153
• Inpuit speed sens low
• Input speed sens high
• M4 brake fuse 18 10a n3
• Mal func lp output
• Pcs high
• Pcs low
• Pnk
• Pnk a
• Radio
• Range sig a
• Range sig b
• Range sig c
• Red
• S101
• S122
• S154
• S210
• S231
• S239
• Sensor ground
• Serial data
• Solid state
• Speed sensor input
• Stoplamp switch input
• Tcc signal
• Tcc/stoplamp switch (behind dash, on brake pedal support)
• Underhood fuse/relay center
• Vehicle control module (vcm) (left side of engine compartment)
• Vss signal
• Vss signal output