ENGINE PERFORMANCE – Chevrolet Chevy Express G3500 1998 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.3L

4.3L (VIN W), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G3500 1998

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G3500 1998:

• (lower front of engine, near crankshaft) crankshaft position sensor
• (right side of engine) evaporative canister purge valve
• (top left side of engine)
• Cam signal
• Camshaft position sensor (part of distributor, top rear 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 emissions canister vent valve (on left frame rail, near ebcm)
• 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 2 (in exhaust pipe, in back 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 motor
• Inj 1 ctrl
• Inj 2 ctrl
• Inj 3 ctrl
• Inj 4 ctrl
• Inj 5 ctrl
• Inj 6 ctrl
• Knock sens signal
• Knock sensor (top rear of engine)
• Maf signal
• Map sens signal
• Nca
• Pnk
• Pnk a
• Pnk c
• S101
• S103
• S301
• 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) (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 G3500 1998

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G3500 1998:

• (o2s jumper harness, approx 22 cm from breakout toward o2s pigtail connector) s304
• 1-2 shift solenoid
• 2-3 shift solenoid
• 3-2 shift solenoid
• Automatic transmission
• Eng1 fuse 20a
• Exhaust gas recirculation valve (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 1 sensor 3 (in exhaust pipe, in back of catalytic converter)
• Hot in run or start
• Nca
• Note: fuel injectors are located in central sfi, top of intake manifold
• Pnk
• Pnk pnk pnk
• Press switch signal bit 1
• Press switch signal bit 2
• Press switch signal bit 3
• Pressure control solenoid
• Pwr
• Red
• S130
• S132
• S133
• Sensor ground
• Tan
• Tcc pwm solenoid
• Tcc sol
• Temp sensor signal
• Under hood fuse-relay center

4.3L (VIN W), Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G3500 1998

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G3500 1998:

• (engine harness at generator bracket) g119
• (engine harness, approx 11cm from underhood fuse- relay center)
• (engine harness, approx 12 cm from fuel injector breakout)
• (engine harness, approx 85 cm from underhood fuse- relay center)
• (engine harness, approx 92 cm from underhood fuse- relay center)
• (engine harness, at generator bracket)
• B14
• B17
• Ecm-b mini fuse 20a
• Engine coolant temperature sensor (top front of engine)
• F11
• Fuel lvl input
• Fuel pump and sender (in fuel tank under rear of vehicle)
• Fuel pump prime connector
• Fuel pump relay
• Fuel pump switch and engine oil pressure gauge sensor (top rear of engine)
• Fuel tank pressure sensor (in fuel tank)
• G119
• G119 (engine harness at generator bracket)
• G12
• Gauge input oil pressure
• Gauges fuse 4 10a
• Hot at all times
• Hot in off, run or start
• Hot in run or start
• I/p fuse block
• Input odometer speedometer/
• Instrument cluster
• Intake air temperature sensor (part of air intake duct, front of engine compartment)
• Malfunction indicator lamp (mil) "service engine soon"
• Manifold absolute pressure sensor (top right side of engine)
• Mass air flow sensor (part of air intake duct, top front of engine)
• Pnk
• Red
• S102
• S120
• S136
• S137
• S138
• S139
• S216
• Tan
• Tan a
• Throttle position sensor (top left side of engine)
• Trans fuse 20 10a
• Underhood fuse-relay center
• Vehicle speed sensor (left side of transmission)

4.3L (VIN W), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G3500 1998

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G3500 1998:

• (engine harn, 98 cm from underhood
• (engine harness at generator bracket) g119
• (engine harness, 4 cm from a/c compressor breakout) s153
• (engine harness, 7 cm from breakout to ground towards trans)
• (i/p harness, approx 10cm into radio breakout) s239
• (i/p harness, approx 18 cm from engine sensors inline conn toward bulkhead)
• 5 volt reference
• 5 volts reference
• A/c com rel coil
• A/c compressor enable relay
• A/c request sig
• A/c signal
• Air conditioning system
• Battery
• Brake switch input
• Coil
• Cruise control module (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) (left frame rail near center of vehicle)
• Est control signal
• Evap driver
• Evo/passlock module (center of dash)
• Fuel pump rly ctrl
• Fuse-relay center s154
• Ground
• High voltage coil wire
• Hot in run
• I/p fuse block
• Ignition
• Ignition coil (top right side of engine)
• Ignition control module (top right side of engine)
• M4 brake fuse 18 10a n3
• Mal func ind out
• Pnk
• Pnk a
• Radio
• Red
• S103
• S122
• S210
• S231
• Sensor ground
• Serial data
• Signal input
• Solid state
• Speed sensor input
• Stoplamp switch input
• Tcc signal
• Tcc/stoplamp switch (below center of dash, near brake pedal lever)
• Trans press sig-bit 1
• Trans press sig-bit 2
• Trans press sig-bit 3
• Trans. force mtr feed
• Trans. force mtr rtn
• Underhood fuse-relay center
• Vcm signal
• Vehicle control module (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 G3500 1998

List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G3500 1998:

• (lower front of engine, near crankshaft) crankshaft position sensor
• (right side of engine) evaporative emission canister purge valve
• (top left side of engine) idle air control valve
• 1-2 shift sol
• 2-3 shift sol
• 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 ebcm)
• 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 2 (in exhaust pipe in front of catalytic converter)
• Heated oxygen sensor bank 1 sensor 3 (5.0l) heated oxygen sensor bank 2 sensor 2 (5.7l) (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
• S103
• S301
• S304
• Shift solenoid output
• Solid state
• Tan
• Tcc sol output
• Temp sens signal
• Tp sig
• 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 G3500 1998

List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G3500 1998:

• (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)
• 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 or start
• Ignition
• K7 eng-1 fuse 20a l8
• Nca
• Pnk
• Pnk tan
• Pressure control solenoid valve
• Red
• S130
• S131
• S132
• S133
• Tan
• Tcc pcm solenoid valve
• Tcc solenoid vlave
• Temp sensor ground
• Temp sensor signal
• Under hood 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 G3500 1998

List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G3500 1998:

• (engine harn, approx 8 cm from ho2s sensor) s136
• (engine harness, approx 17 cm from a/c compressor breakout)
• (engine harness, approx 3 cm from fuel injector breakout)
• (engine harness, approx 4 cm from a/c compressor breakout)
• (left front of engine) g110
• B14
• B17
• Ecm-b mini fuse 20a
• Engine coolant temperature gauge sensor (on left cylinder head, between two front spark plugs)
• F11
• Fuel lvl input
• Fuel pump and sender (in fuel tank under rear of vehicle)
• Fuel pump prime connector
• Fuel pump relay
• Fuel pump switch & engine oil pressure gauge sensor (top rear of engine)
• Fuel tank pressure sensor (in fuel tank)
• 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 (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 air flow sensor (part of air intake duct, top front of engine)
• Oil pressure gauge input
• Pnk
• Pnk tan
• Red
• S101
• S102
• S120
• S137
• S138
• S139
• S216
• Speedometer/ odometer input
• Tan
• Tan a
• Throttle position sensor (top left side of engine)
• Trans fuse 20 10a
• Underhood fuse-relay center

5.0L (VIN M), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G3500 1998

List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G3500 1998:

• (engine harn, 4 cm from ignition coil breakout)
• (engine harness, 8 cm from ignition coil breakout) s153
• (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
• 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
• Evo/passlock control module (center of dash)
• 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)
• 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 (below center of dash, near brake pedal lever)
• Underhood fuse-relay center
• Vcm signal
• 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 G3500 1998

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G3500 1998:

• (lower front of engine, near crankshaft) crankshaft position sensor
• (right side of engine) evaporative emission canister purge valve
• (top left side of engine) idle air control valve
• 1-2 shift sol
• 2-3 shift sol
• 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 ebcm)
• 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 2 (in exhaust pipe in front of catalytic converter)
• Heated oxygen sensor bank 1 sensor 3 (5.0l) heated oxygen sensor bank 2 sensor 2 (5.7l) (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
• S103
• S301
• S304
• Shift solenoid output
• Solid state
• Tan
• Tcc sol output
• Temp sens signal
• Tp sig
• 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 G3500 1998

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G3500 1998:

• (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)
• 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 or start
• Ignition
• K7 eng-1 fuse 20a l8
• Nca
• Pnk
• Pnk tan
• Pressure control solenoid valve
• Red
• S130
• S131
• S132
• S133
• Tan
• Tcc pcm solenoid valve
• Tcc solenoid vlave
• Temp sensor ground
• Temp sensor signal
• Under hood 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 G3500 1998

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G3500 1998:

• (engine harn, approx 8 cm from ho2s sensor) s136
• (engine harness, approx 17 cm from a/c compressor breakout)
• (engine harness, approx 3 cm from fuel injector breakout)
• (engine harness, approx 4 cm from a/c compressor breakout)
• (left front of engine) g110
• B14
• B17
• Ecm-b mini fuse 20a
• Engine coolant temperature gauge sensor (on left cylinder head, between two front spark plugs)
• F11
• Fuel lvl input
• Fuel pump and sender (in fuel tank under rear of vehicle)
• Fuel pump prime connector
• Fuel pump relay
• Fuel pump switch & engine oil pressure gauge sensor (top rear of engine)
• Fuel tank pressure sensor (in fuel tank)
• 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 (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 air flow sensor (part of air intake duct, top front of engine)
• Oil pressure gauge input
• Pnk
• Pnk tan
• Red
• S101
• S102
• S120
• S137
• S138
• S139
• S216
• Speedometer/ odometer input
• Tan
• Tan a
• Throttle position sensor (top left side of engine)
• Trans fuse 20 10a
• Underhood fuse-relay center

5.7L (VIN R), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G3500 1998

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G3500 1998:

• (engine harn, 4 cm from ignition coil breakout)
• (engine harness, 8 cm from ignition coil breakout) s153
• (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
• 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
• Evo/passlock control module (center of dash)
• 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)
• 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 (below center of dash, near brake pedal lever)
• Underhood fuse-relay center
• Vcm signal
• Vehicle control module (vcm) (left side of engine compartment)
• Vss signal
• Vss signal output