All Wiring Diagrams for Chevrolet Chevy Express G1998 2500 model

AIR CONDITIONING

A/C Wiring Diagram, Cargo Van for Chevrolet Chevy Express G1998 2500

List of elements for A/C Wiring Diagram, Cargo Van for Chevrolet Chevy Express G1998 2500:

(aux hvac harn, 14 cm from aux hvac module breakout)
(below dash, right side of a/c plenum) temperature valve actuator motor
(diesel)
(diesel) (left front of eng) g110
(gas)
(gasoline)
(i/p harn, 4 cm from radio breakout)
(i/p harn, 7 cm from vssb breakout)
(in engine harness)
(in underhood fuse/relay center)
(left body harn, left side of cabin)
(left rear interior)
(left rear of cabin, behind rear wheelhouse)
(rear a/c harn, 7 cm from blower motor resistor breakout)
(rear a/c harn, 7 cm from o/s air vlv actuator breakout)
(rear a/c harness, 13 cm from blower motor resistor/relay breakout)
(rear aux hvac harn, 29 cm from rear aux hvac module breakout)
A/c
A/c compressor clutch coil
A/c compressor clutch relay (in underhood fuse/relay center)
A/c compressor high pressure cutoff switch (rear of a/c compressor)
A/c compressor low pressure cutoff switch (diesel) (in refrigerant line)
A/c compressor low pressure cutoff switch (gasoline) (in refrigerant line)
A/c fuse 10a
Auxiliary blower motor
Auxiliary blower motor high speed relay
Auxiliary blower motor low speed relay
Auxiliary blower motor medium speed relay
Auxiliary blower motor resistor (left rear of cabin, behind rear wheelhouse)
Bi-lev
Blend
Blower fuse 60a
Blower motor
Blower motor resistor/relay (at hvac control panel)
C2 c
C202
C3 d3
Convenience center
D3 c3
Def
Diode
G110 (left front of engine)
G120 (right side of engine)
G200 (left kick panel)
Gasoline diesel
Heat
Heater and a/c controller
Hot at all times
Hot in run
Hot in run or start
Htr-a/c fuse 12 20a
I/p fuse block
Ign e fuse 10a
Interior lights system
Max
Med
Off
Pnk
Rear auxiliary hvac control module
Rear auxiliary mode valve and seal assy (left rear interior)
Rear auxiliary temperature
Red
Rr blower fuse 30a
Rr hvac fuse 24 10a
S103
S202
S215
S307
S318
S404
S405 (rear a/c harn, 7 cm from blower resistor breakout)
S411
S412
S413
Tan
Temp
Under- hood fuse/ relay center
Valve assy
Vehicle control module (in engine compt at left fender) powertrain control module (behind center of dash)
Vent
Vent mode

A/C Wiring Diagram, Passenger Van for Chevrolet Chevy Express G1998 2500

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List of elements for A/C Wiring Diagram, Passenger Van for Chevrolet Chevy Express G1998 2500:

(aux hvac harn, 14 cm from aux hvac module breakout)
(aux hvac harn, 26 cm from aux hvac module breakout)
(aux hvac harn, 57 cm from aux hvac module breakout)
(below dash, right side of a/c plenum) temperature valve actuator motor
(diesel)
(front interior roof panel)
(gas)
(gasoline)
(i/p harn, 7 cm from vssb breakout)
(i/p harn, 4 cm from radio breakout) s215
(in engine harness)
(in engine harness) s103
(in underhood fuse/relay center)
(left body harn, left side of cabin)
(left front of eng) g110
(left rear interior)
(left rear of cabin, behind rear wheelhouse)
(rear a/c harn, 7 cm from blower motor resistor breakout)
(rear a/c harn, 7 cm from o/s air vlv actuator breakout)
(rear a/c harness, 13 cm from blower motor resistor/relay breakout)
(rear aux hvac harn, 29 cm from rear aux hvac module breakout)
(rear hvac harn, 13 cm from aux hvac module breakout)
A/c
A/c compressor clutch coil
A/c compressor clutch relay (in underhood fuse/relay center)
A/c compressor high pressure cutoff switch (rear of a/c compressor)
A/c compressor low pressure cutoff switch (diesel) (in refrigerant line)
A/c compressor low pressure cutoff switch (gasoline) (in refrigerant line)
A/c fuse 10a
Auxiliary blower motor
Auxiliary blower motor high speed relay
Auxiliary blower motor low speed relay
Auxiliary blower motor medium speed relay
Auxiliary blower motor resistor (left rear of cabin, behind rear wheelhouse)
Bi-lev
Blend
Blower fuse 60a
Blower motor
Blower motor resistor/relay (at hvac control panel)
C2 c
C202
Convenience center
Def
Diode
Front auxiliary hvac control module
G110 (left front of engine)
G120 (right side of engine)
G200 (left kick panel)
Gasoline diesel
Heat
Heater and a/c control logic module
Heater and a/c controller
Hot at all times
Hot in run
Hot in run or start
Htr-a/c fuse 12 20a
I/p fuse block
Ign e fuse 10a
Interior lights system
Max
Med
Off
Pnk
Rear auxiliary hvac control module
Rear auxiliary mode valve and seal assy (left rear interior)
Rear auxiliary temperature
Red
Rr blower fuse 30a
Rr ctrl
Rr hvac fuse 24 10a
S202
S307
S318
S319
S320
S321
S404
S405 (rear a/c harn, 7 cm from blower resistor breakout)
S411
S412
S413
Tan
Temp
Under- hood fuse/ relay center
Valve assy
Vehicle control module (in engine compt at left fender) powertrain control module (behind center of dash)
Vent
Vent mode

Compressor Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for Compressor Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(diesel) g110 (left front of engine)
A/c
A/c compress0r high pressure cutoff switch (diesel) (rear of a/c compressor)
A/c compress0r low pressure cutoff switch (diesel) (in refrigerant line)
A/c compressor clutch coil
A/c compressor clutch relay (in underhood fuse/relay center)
A/c fuse 10a
Bi-lev
Blnd
Def
Diesel
G120 (gas) (right side of engine)
Gasoline
Harness)
Heat
Hot at all times
Hot in run
Hot in run or start
Htr-a/c fuse 12 20a
Hvac control module
I/p fuse block
Ign e fuse 10a
Max
Off
Pnk
S215 (i/p harn, 4 cm from radio breakout)
Underhood fuse/relay center
Vehicle control module (gasoline) (in engine compt, at left fender) powertrain control module (diesel) (behind center of dash)
Vent

Heater Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for Heater Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(at hvac control panel)
(diesel)
(gasoline)
(i/p harness, 4 cm from radio breakout)
(left rear of cabin, behind rear wheelhouse)
(rear a/c harness, 13 cm from blower motor resistor breakout)
(rear a/c harness, 7 cm from blower motor resistor breakout)
(rear a/c harness,7 cm from blower motor resistor breakout)
(right side of engine)
Auxiliary blower motor (left rear of cabin, behind rear wheelhouse)
Auxiliary blower motor high speed relay
Auxiliary blower motor low speed relay
Auxiliary blower motor medium speed relay
Auxiliary blower motor resistor (left rear of cabin, behind rear wheelhouse)
Auxiliary blower motor switch
Blend
Blower fuse 60a
Blower motor
Blower motor resistor/relay
C202
Convenience center
Def
G120 g110 (left front of engine)
G402 (left rear of vehicle)
Heat
Heater controller
Hot at all times
Hot in run
Hot in run or start
Htr-a/c fuse 12 20a
I/p fuse block
Interior lights system
Med
Off
Red
Rr blower fuse 30a
Rr hvac fuse 24 10a
S215
S400 (left body harness, near chmsl)
S405
S412
S413
Tan
Underhood fuse/relay center
Vent

ANTI-LOCK BRAKES

4.3L

4.3L (VIN W), Anti-lock Brake Wiring Diagrams for Chevrolet Chevy Express G1998 2500

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List of elements for 4.3L (VIN W), Anti-lock Brake Wiring Diagrams for Chevrolet Chevy Express G1998 2500:

(engine harn, near injector breakout)
(engine harn, near trans- mission)
(front of engine)
(left front bracket)
(left side of dash) data link connector
A13
Abs fuse 60a
Abs ind
Abs lamp control
B17
Brake diode d101 (underhood fuse-relay center)
Brake fuse 18 10a
Brake ind
Brake lamp control
Brake pressure differential switch
Brake sw input
Brake sw output
Daytime running lamps control (left side of dash)
Ebcm ground
Electronic brake control module (on left frame rail)
G110
G125
Gauges fuse 4 10a
Hot at all times
Hot in run or start
I/p fuse block
Ign
Instrument cluster
Left front wheel speed sensor
Lft frt sensor (+)
Lft frt sensor (-)
Pnk
Pump motor ground
Pump motor power
Red
Right front wheel speed sensor
Rt frt sensor (+)
Rt frt sensor (-)
S102
S153
S154
S156
S216
Serial data line
Serial data signal
Tan
Tcc/ stoplamp switch (brake pedal support)
Underhood fuse-relay center
Vehicle control module (left side of engine compt)
Vehicle speed sensor (left side of transmission)
Vehicle speed sig
Vss (+)
Vss (-)
Vss sig

5.0L

5.0L (VIN M), Anti-lock Brake Wiring Diagrams for Chevrolet Chevy Express G1998 2500

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List of elements for 5.0L (VIN M), Anti-lock Brake Wiring Diagrams for Chevrolet Chevy Express G1998 2500:

(engine harn, near injector breakout)
(engine harn, near trans- mission)
(front of engine)
(left front bracket)
(left side of dash) data link connector
A13
Abs fuse 60a
Abs ind
Abs lamp control
B17
Brake diode d101 (underhood fuse-relay center)
Brake fuse 18 10a
Brake ind
Brake lamp control
Brake pressure differential switch
Brake sw input
Brake sw output
Daytime running lamps control (left side of dash)
Ebcm ground
Electronic brake control module (on left frame rail)
G110
G125
Gauges fuse 4 10a
Hot at all times
Hot in run or start
I/p fuse block
Ign
Instrument cluster
Left front wheel speed sensor
Lft frt sensor (+)
Lft frt sensor (-)
Pnk
Pump motor ground
Pump motor power
Red
Right front wheel speed sensor
Rt frt sensor (+)
Rt frt sensor (-)
S102
S153
S154
S156
S216
Serial data line
Serial data signal
Tan
Tcc/ stoplamp switch (brake pedal support)
Underhood fuse-relay center
Vehicle control module (left side of engine compt)
Vehicle speed sensor (left side of transmission)
Vehicle speed sig
Vss (+)
Vss (-)
Vss sig

5.7L

5.7L (VIN R), Anti-lock Brake Wiring Diagrams for Chevrolet Chevy Express G1998 2500

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List of elements for 5.7L (VIN R), Anti-lock Brake Wiring Diagrams for Chevrolet Chevy Express G1998 2500:

(engine harn, near injector breakout)
(engine harn, near trans- mission)
(front of engine)
(left front bracket)
(left side of dash) data link connector
A13
Abs fuse 60a
Abs ind
Abs lamp control
B17
Brake diode d101 (underhood fuse-relay center)
Brake fuse 18 10a
Brake ind
Brake lamp control
Brake pressure differential switch
Brake sw input
Brake sw output
Daytime running lamps control (left side of dash)
Ebcm ground
Electronic brake control module (on left frame rail)
G110
G125
Gauges fuse 4 10a
Hot at all times
Hot in run or start
I/p fuse block
Ign
Instrument cluster
Left front wheel speed sensor
Lft frt sensor (+)
Lft frt sensor (-)
Pnk
Pump motor ground
Pump motor power
Red
Right front wheel speed sensor
Rt frt sensor (+)
Rt frt sensor (-)
S102
S153
S154
S156
S216
Serial data line
Serial data signal
Tan
Tcc/ stoplamp switch (brake pedal support)
Underhood fuse-relay center
Vehicle control module (left side of engine compt)
Vehicle speed sensor (left side of transmission)
Vehicle speed sig
Vss (+)
Vss (-)
Vss sig

ANTI-THEFT

Anti-theft Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for Anti-theft Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(diesel)
(front of engine, near thermostat housing)
(i/p harn, 4 cm into vssb breakout)
12v
12v reg
5 volt ref
B17
Data link connector (dlc) (left side of dash)
Electronic power steering system
Engine controls system
Evo sol feed
Evo sol out
Evo/passlock module (below center of dash)
G125
Gauges fuse 4 10a
Grd
Hot at all times
Hot in run or start
I/p fuse block
Ign
Instrument cluster
Instrument cluster system (diesel)
Passlock sensor (internal to steering column)
Passlock sig
Passlock signal
Pnk
S112
S207
S216
S246 (i/p harn, 25 cm from hvac breakout)
Sec ind out
Security indicator
Security strg fuse 21 10a
Sens ret
Sensor grd
Serial data
Vss
Wheel pos sig

COMPUTER DATA LINES

Computer Data Lines for Chevrolet Chevy Express G1998 2500

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List of elements for Computer Data Lines for Chevrolet Chevy Express G1998 2500:

(4.3l: engine harn, 4cm from a/c compressor breakout, toward transmission) (5.0/5.7l: engine harn, 8cm from ignition coil breakout toward transmission) (7.4l: engine harn, 4cm from c100 breakout toward egr sensor breakout) (6.5l diesel: engine harn, 27cm from underhood fuse- relay center to main harn and c100 breakouts)
(left front of engine) (5.0/5.7/7.4l) g110 g119 (4.3l only) (right front of engine)
C210
Convenience center (under left side of dash)
Data clss
Data link connector (under left side of dash)
Diag sig
Diesel
Electronic brake control module (on left frame rail near center of vehicle)
Evo/ passlock module (below center of dash)
G125 (6.5l) (front of engine, near t'stat housing)
G200 (behind left kick panel)
Gas
Hot at all times
I/p fuse block
Inflatable restraint sensing and diagnostic module (under driver's seat)
Powertrain control module (behind center of dash)
Prog signal
Pwr aux fuse 7 25a
Remote control door lock receiver (on upper right kick panel)
S112
S153
S201
S207 (dash harness, approx 4 cm into vssb breakout)
S218
Serial data
Tan
Vehicle control module (on left side of eng compt)

CRUISE CONTROL

4.3L

4.3L (VIN W), Cruise Control Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for 4.3L (VIN W), Cruise Control Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(i/p harn, 17 cm into vssb breakout)
(i/p harn, left rear of engine compt)
(i/p harn, near park brake warning switch breakout)
4000 pulses/mile
A12
A13
A14
A15
Brake fuse 18 10a
Cruise control module (front of engine compt near left fender)
Cruise fuse 6 10a
Cruise on input
Cruise status
Cruise switch
Disengage input
Fuse block
G125 (front of engine,
Ground
Hot at all times
Hot in run
Ignition
Multifunction lever
Near thermostat housing)
Off
R/a
Resume/accel input
S/c
S112
S114
S210
S231
S239
Set/coast input
Stop fuse 1 20a
Tcc/stoplamp switch (on pedal support)
Vehicle control module (vcm) (left side of engine compt)
Vehicle speed input
Vehicle speed sensor (vss) (left side of transmission)
Vss return
Vss signal

5.0L

5.0L (VIN M), Cruise Control Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for 5.0L (VIN M), Cruise Control Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(i/p harn, 17 cm into vssb breakout)
(i/p harn, left rear of engine compt)
(i/p harn, near park brake warning switch breakout)
4000 pulses/mile
A12
A13
A14
A15
Brake fuse 18 10a
Cruise control module (front of engine compt near left fender)
Cruise fuse 6 10a
Cruise on input
Cruise status
Cruise switch
Disengage input
Fuse block
G125 (front of engine,
Ground
Hot at all times
Hot in run
Ignition
Multifunction lever
Near thermostat housing)
Off
R/a
Resume/accel input
S/c
S112
S114
S210
S231
S239
Set/coast input
Stop fuse 1 20a
Tcc/stoplamp switch (on pedal support)
Vehicle control module (vcm) (left side of engine compt)
Vehicle speed input
Vehicle speed sensor (vss) (left side of transmission)
Vss return
Vss signal

5.7L

5.7L (VIN R), Cruise Control Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for 5.7L (VIN R), Cruise Control Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(i/p harn, 17 cm into vssb breakout)
(i/p harn, left rear of engine compt)
(i/p harn, near park brake warning switch breakout)
4000 pulses/mile
A12
A13
A14
A15
Brake fuse 18 10a
Cruise control module (front of engine compt near left fender)
Cruise fuse 6 10a
Cruise on input
Cruise status
Cruise switch
Disengage input
Fuse block
G125 (front of engine,
Ground
Hot at all times
Hot in run
Ignition
Multifunction lever
Near thermostat housing)
Off
R/a
Resume/accel input
S/c
S112
S114
S210
S231
S239
Set/coast input
Stop fuse 1 20a
Tcc/stoplamp switch (on pedal support)
Vehicle control module (vcm) (left side of engine compt)
Vehicle speed input
Vehicle speed sensor (vss) (left side of transmission)
Vss return
Vss signal

DEFOGGERS

Heated Mirrors Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for Heated Mirrors Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(behind left kick panel) g200
C210
Convenience center (under left side of dash)
G203 (right kick panel)
Heated mirror switch
Heater & a/c controller
Hot at all times
Hot in run
Htd mir fuse 2 20a
Htr-a/c fuse 12 20a
I/p fuse block (on left lower kick panel)
Left power outside rear view mirror
Right power outside rear view mirror
S201
S202
S206
S215
Solid state timer
W/ upfitter provisions only

ELECTRONIC POWER STEERING

Electronic Power Steering Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for Electronic Power Steering Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(i/p harness, approximately 10 cm into radio breakout)
(i/p harness, approximately 4 cm into vssb breakout)
(left front of engine) g110
1995 vftc c
5 volt ref
Battery
Data
Data link connector (dlc) (under left side of dash)
Diesel
Evo feed
Evo solenoid out
Evo/passlock module (below center of dash)
Gas
Gauges fuse 4 10a
Ground
Hot at all times
Hot in run & start
I/p fuse block (on left lower kick panel)
Ignition
Pnk
Power steering fluid flow actuator (on power steering pump)
S112
S207
S216
S239
Security strg fuse 21 10a
Sensor input
Sensor output
Sensor return
Steering wheel position sensor (attached to steering column)
Vehicle control module (on left side of engine compartment)
Vehicle speed sensor buffer (below dash, near steering column)
Volt ref
Vss sig out
Vss signal input

ENGINE PERFORMANCE

4.3L

4.3L (VIN W), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G1998 2500

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List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G1998 2500:

(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 G1998 2500

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List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G1998 2500:

(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 G1998 2500

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List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G1998 2500:

(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 G1998 2500

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List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G1998 2500:

(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 G1998 2500

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List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G1998 2500:

(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 G1998 2500

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List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G1998 2500:

(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 G1998 2500

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List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G1998 2500:

(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 G1998 2500

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List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G1998 2500:

(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 G1998 2500

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List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Chevy Express G1998 2500:

(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 G1998 2500

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List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Chevy Express G1998 2500:

(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 G1998 2500

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List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Chevy Express G1998 2500:

(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 G1998 2500

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List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Chevy Express G1998 2500:

(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

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for Back-up Lamps Wiring Diagram for Chevrolet Chevy Express G1998 2500:

C202
Convenience center (under left side of dash)
D c406
G402 (left rear of interior, behind rear wheelhouse)
G403 (right rear of interior, behind rear wheelhouse)
Hot in run or start
I/p fuse block
Left backup lamp
Park/neutral position switch (left side of transmission)
Pnk
Right backup lamp
S217
S409
S909
S910
Turn b/u fuse 16 20a
W/ optional trailer wiring package (right rear of interior)

Exterior Lamps Wiring Diagram, with Composite Headlamps for Chevrolet Chevy Express G1998 2500

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List of elements for Exterior Lamps Wiring Diagram, with Composite Headlamps for Chevrolet Chevy Express G1998 2500:

(1997)
(1998)
(center high mount stoplamp harness, behind chmsl) s422
(dash harness, 4cm into head- lamp switch breakout) s225
(forward lamp harn, 26cm into left forward lamp harness) s142
(forward lamp harness, 26cm from left forward lamp breakout) s135
(left tail- lamp harn, behind left taillamp assembly) s901
(not used)
(right rear of interior) w/ optional trailer wiring package)
A10
B c406
B9 turn pwr b8 haz pwr b7 flshr out c8 gnd
C202
Center high mounted stop lamp (chmsl)
Convenience center (under left side of dash)
Cruise control system
E1 c202
E6 c202
F c406
G100 (left front of engine compartment)
G101 (right front of engine compartment)
G105 (right rear of engine compartment)
G200 (behind left kick panel)
G402 (left rear interior, behind rear wheelhouse)
G403 (right rear interior, behind rear wheelhouse)
Haz sw
Hazard
Hazard fuse 20a
Head
Headlamp switch
Hot at all times
Hot in run or start
I/p fuse block
Instru- ment cluster
Interior lights system
Left
Left front inner park/ turn signal lamp
Left front outer park/ turn signal lamp
Left rear park & stop tail lamp
Left rear park & turn signal lamp
Left side marker lamp
Left turn indic
License lamp
Normal
Off
Park
Park lps fuse 9 20a
Pnk
Right
Right front inner park/ turn signal lamp
Right front outer park/ turn signal lamp
Right rear park & turn signal lamp
Right rear park/stop/ tail lamp
Right side marker lamp
Right turn indic
S110
S114 (dash harn, left rear of engine compartment)
S118
S145 (forward lamp harness, 15cm into right forward lamps breakout)
S202
S217
S222
S236 (dash harness, 4cm from dlc breakout)
S237 (dash harness, base of steering column, near cluster breakout)
S402 (left body harn, behind left taillamp assembly)
S410 (left body harn, near chmsl connector breakout)
S421
S904
S909
S910
Stop fuse 25a
Taillamp assembly)
Tcc/ stop lamp switch (behind dash, on brake pedal support)
Tn sw
Turn- b/u fuse 16 20a
Turn/ hazard switch
Turn/hazard lamp flasher (behind dash, on dash relay center)
W/ optional trailer wiring package (right rear of interior)

Exterior Lamps Wiring Diagram, with Sealed Beam Headlamps for Chevrolet Chevy Express G1998 2500

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List of elements for Exterior Lamps Wiring Diagram, with Sealed Beam Headlamps for Chevrolet Chevy Express G1998 2500:

(1997)
(1998)
(center high mount stoplamp harness, behind chmsl) s422
(dash harness, 4cm into head- lamp switch breakout) s225
(forward lamp harness, 26cm from left forward lamp breakout) s135
(left tail- lamp harn, behind left taillamp assembly) s901
(not used)
(right rear of interior) w/ optional trailer wiring package)
A10
B c406
B9 turn pwr b8 haz pwr b7 flshr out c8 gnd
C202
Center high mounted stop lamp (chmsl)
Convenience center (under left side of dash)
Cruise control system
E1 c202
E6 c202
F c406
G100 (left front of engine compartment)
G101 (right front of engine compartment)
G105 (right rear of engine compartment)
G200 (behind left kick panel)
G402 (left rear interior, behind rear wheelhouse)
G403 (right rear interior, behind rear wheelhouse)
Haz sw
Hazard
Hazard fuse 20a
Head
Headlamp switch
Hot at all times
Hot in run or start
I/p fuse block
Instru- ment cluster
Interior lights system
Left
Left front park/turn signal lamp
Left rear park & stop tail lamp
Left rear park & turn signal lamp
Left side marker lamp
Left turn indic
License lamp
Normal
Off
Park
Park lps fuse 9 20a
Pnk
R100 (resistor) (6 ohms, 30 watts) (forward lamp harness, left front of vehicle near headlamp)
Right
Right front park/turn signal lamp
Right rear park & turn signal lamp
Right rear park/stop/ tail lamp
Right side marker lamp
Right turn indic
S110
S114 (dash harn, left rear of engine compartment)
S118
S142 (forward lamp harn, 26cm into left forward lamp harness)
S202
S217
S222
S236 (dash harness, 4cm from dlc breakout)
S237 (dash harness, base of steering column, near cluster breakout)
S402 (left body harn, behind left taillamp assembly)
S410 (left body harn, near chmsl connector breakout)
S421
S904
S909
S910
Stop fuse 25a
Taillamp assembly)
Tcc/ stop lamp switch (behind dash, on brake pedal support)
Tn sw
Turn- b/u fuse 16 20a
Turn/ hazard switch
Turn/hazard lamp flasher (behind dash, on dash relay center)
W/ optional trailer wiring package (right rear of interior)

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 3) for Chevrolet Chevy Express G1998 2500

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List of elements for Ground Distribution Wiring Diagram (1 of 3) for Chevrolet Chevy Express G1998 2500:

(forward lamp harness, approx 19 cm into left forward lamp breakout)
(forward lamp harness, approx 22 cm into right forward lamp breakout)
(i/p harness, approx 4 cm from radio breakout)
(lower i/p harness, approx 15 cm from connector near i/p compartment door)
(not used) e13
(upfitter provision)
(w/ upfitter provisions)
A/t shift lock solenoid
Ashtray lamp
Auxiliary battery (6.5l vin f)
Auxiliary power outlet
Battery
C210
Cigarette lighter
Convenience center
Convenience center (left side of dash)
Data link connector
Daytime running lamp control module
Daytime running lamps relay
From s500 (diagram 2 of 3)
From s601 (diagram 2 of 3)
G100 (left front of engine compt)
G100 (left side
G100 (left side of engine compartment)
G101 (right front
G101 (right front of engine compt)
G113 (middle of left frame rail)
G116 (under brake master cylinder)
G118 (right lower front of engine)
G119 (right frame rail, near front of engine)
G200 (behind left kick panel)
G203 (right kick panel)
Headlamp switch
Heater and a/c controller
I/p compartment lamp
I/p relay center
Ignition switch
Illuminated entry module
Instrument cluster
Left front park and turn signal lamp (inner) (w/ composite headlamps)
Left front park and turn signal lamp (outer) (w/ composite headlamps)
Left front park and turn signal lamp (w/ sealed beam headlamps)
Left front side marker lamp
Left headlamp (w/ sealed beam headlamps)
Left high beam headlamp (w/ composite headlamps)
Left low beam headlamp (w/ composite headlamps)
Left power seat switch
Left sun shade mirror lamp
Low engine coolant level indicator module (diesel)
Low engine coolant level indicator sensor (diesel)
Multi- function alarm module
Nca
Of engine compt)
P/b booster fluid flow switch
Power antenna assembly
Power door lock control module
Power door lock relay
Radio
Remote control door lock receiver
Right front park and turn signal lamp (inner) (w/ composite headlamps)
Right front park and turn signal lamp (outer) (w/ composite headlamps)
Right front park and turn signal lamp (w/ sealed beam headlamps)
Right front side marker lamp
Right headlamp (w/ sealed beam headlamps)
Right high beam headlamp (w/ composite headlamps)
Right low beam headlamp (w/ composite headlamps)
Right sun shade mirror lamp
S201 (i/p harness, approx 6 cm from park brake warning switch breakout)
S202
S204 (sun shade harness, approx 60 cm from breakout to connector behind right kick panel)
S205
S206 (upfitter provision-crossbody harness, approx 24 cm from power door lock relay breakout, others-crossbody harness, approx 4 cm from breakout to connector near left side of dash)
Seat belt switch
Side door jamb switch (w/ upfitter provisions)
Steering column ground
Temperature valve actuator motor
Upfitter provisions relay
W/ upfitter provisions
W/o keyless entry
Windshield washer pump motor
Windshield wiper motor

Ground Distribution Wiring Diagram (2 of 3) for Chevrolet Chevy Express G1998 2500

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List of elements for Ground Distribution Wiring Diagram (2 of 3) for Chevrolet Chevy Express G1998 2500:

(4.3l-engine harness, approx 20 cm from knock sensor breakout, 5.0l or 5.7l-engine harness, approx 4 cm from ignition coil breakout, 7.4l-engine harness, approx 14 cm from fuel injector breakout)
(4.3l-engine harness, approx 4 cm from fuel injector breakout, 5.0l or 5.7l-approx 10 cm from egr sensor breakout, 7.4l-engine harness, approx 4 cm from ect sensor breakout)
(5.0l, 5.7l, 7.4l) g110 (4.3l) g119
(front of engine)
(front of engine, near thermostat housing)
(i/p harness, approx 40 cm from bulkhead connector)
(left front door harness, approx 7 cm from power window switch breakout)
(left front of engine) (right front of engine)
(o2s jumper harness, 15-77 cm from breakout to connector near starter motor)
(right front door harness, approx 7 cm from power window switch breakout)
(underhood lamp harness, approx 4 cm from breakout to connector near blower motor)
4.3l
4.3l, gvw over 8500 lbs., federal emissions
5.0/ 5.7l
5.0l, 5.7l, 7.4l
7.4l
7.4l only
7.4l/ 4.3l
A/c compressor clutch coil
A/c low pressure cutout switch
B13
Blower motor resistor/ relay
Brake pressure differential switch
Cruise control module
Data link connector
Diode
Electronic brake control module
Evap emission canister vacuum switch
Evo/ passlock module
Except 7.4l
Fuel pump and sender
Fuel pump relay
G125
G200 (left kick panel)
Gasoline engines
Heated oxygen sensor bank 1 sensor 3
Heated oxygen sensor, bank 1 sensor 1
Heated oxygen sensor, bank 1 sensor 2
Heated oxygen sensor, bank 1 sensor 3
Heated oxygen sensor, bank 2 sensor 1
Horns
Ignition control module
Inflatable restraint front end discriminating sensor
Inflatable restraint sensing and diagnostic module
Instrument cluster
Left front door jamb switch
Left front power door lock switch
Left front power side window switch
Left power outside rear view mirror
Mass air flow sensor
Nca
Others
Others except 7.4l
Park/ neutral position switch
Power outside rear view mirror remote control switch
Right front door jamb switch
Right front power door lock switch
Right front power side window switch
Right power outside rear view mirror
S101
S102 (4.3l-engine harness, approx 22 cm from egr sensor breakout, 5.0l, 5.7l-engine harness, approx 37 cm from ect sensor breakout, 7.4l-engine harness, approx 5 cm from maf sensor breakout)
S103
S104
S112
S152 (7.4l-engine harness, 5 cm from oxygen sensor breakout, except 7.4l-engine harness, 4-16 cm from fuel injector breakout)
S208 (i/p harness, approx 7 cm into inflatable restraint sensing and diagnostic module breakout)
S301
Secondary air injection reaction pump clutch (7.4l only)
Starter relay
To s206 (diagram 1 of 3)
Underhood fuse-relay center
Underhood lamp
Underhood reel lamp
Vehicle control module

Ground Distribution Wiring Diagram (3 of 3) for Chevrolet Chevy Express G1998 2500

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List of elements for Ground Distribution Wiring Diagram (3 of 3) for Chevrolet Chevy Express G1998 2500:

(aux heater and a/c harness, approx 14 cm from front aux hvac module breakout)
(engine harness, approx 22 cm from optical fuel temperature sensor breakout)
(i/p harness, approx 40 cm from bulkhead connector)
(left front of engine)
(underhood lamp harness, approx 4 cm from breakout to connector near blower motor)
(upfitter provision-left body harness, approx 7 cm from breakout to connector behind left rear wheelhouse, others-left body harness, approx 7 cm from breakout to connector behind left rear lens assembly)
A/c compressor clutch coil
Ambulance package
Auxiliary blower motor
Auxiliary blower motor switch
B13
Blower motor resistor/ relay
Brake pressure differential switch
Center high mounted stoplamp
Data link connector
Diesel engines
Diode
Electronic brake control module
Evo/ passlock module
Front auxiliary hvac control module
Fuel heater
Fuel lift pump
Fuel pump relay
Fuel sender buffer module
G110
G125 (front of engine, near thermostat housing)
G402 (left rear interior, behind rear wheelhouse)
G403 (right rear interior, behind rear wheelhouse)
Glow plug relay
Heater and a/c control logic module
Horns
Instrument cluster
Left back-up lamp
Left rear park/ stop lamp
Left rear park/ turn lamp
License lamp
Nca
Park/ neutral position switch
Passenger vans only
Powertrain control module
Rear auxiliary hvac control module
Rear auxiliary mode valve and seal assembly
Rear auxiliary temperature valve assembly
Right back-up lamp
Right power seat switch
Right rear door jamb switch
Right rear park/ stop lamp
Right rear park/ turn lamp
S101
S102 (engine harness, approx 4 cm from main harness breakout)
S104
S112
S303 (right body harness, approx 7 cm from side door jamb switch)
S318
S400
S401 (left body harness, approx 7 cm from connector breakout to left rear of vehicle)
S411 (rear a/c harness, approx 7 cm from o/s air valve actuator breakout)
S421 (center high mount stoplamp harness, approx 60 cm from breakout to connector under rear center of headliner)
S904 (right rear door harness, approx 29 cm from door jamb switch breakout)
S909 (right taillamp harness, approx 7 cm from pass-through grommet)
S910 (left taillamp harness, approx 7 cm from pass-through grommet)
Side door jamb switch
Starter relay
Underhood fuse-relay center
Underhood lamp
Underhood reel lamp
Vehicle speed sensor buffer
W/ auxiliary heat & a/c
W/ auxiliary heat only
Water-in- fuel indicator

HEADLIGHTS

Headlight Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for Headlight Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(behind left kick panel) g200
(forward lamp harn, approx 13cm from left forward lamp breakout toward right breakout) s143
17a
A17
Acc
B17
Brake ind ctrl
Brake psi in
C200
Composite headlamps
Daytime running lamps module (under left side of dash, taped to dash harness)
Daytime running lamps relay (under left side of dash, on lower center portion of convenience center)
Drl diode module (near i/p relay center, under left side of dash)
Drl fuse 15 15a
Drl indicator
Drl relay ctrl
E11 c200
E12
E13
F f
G100 (left front of engine compt)
G101 (right front of engine compt)
Gauges fuse 4 10a
Ground
Head
Headlamp dimmer switch
Headlamp switch
High beam indicator
Hot at all times
Hot in run or start
I/p fuse block (on left lower kick panel)
Ign (run/st)
Ign key status
Ignition switch
Instrument cluster
Instrument cluster system
Lamp feed
Left headlamp
Left high beam headlamp lamp
Left low beam headlamp lamp
Lighting maxi fuse 40a
Lock
Off
Park
Park brake in
Park brake warning switch (near left kick panel, on park brake lever)
Pnk
Red
Right headlamp
Right high beam headlamp lamp
Right low beam headlamp lamp
Run
S118
S119
S143 (forward lamp harn, approx 13cm from left forward lamp breakout toward right forward lamp breakout)
S144 (forward lamp harn, approx 19cm from left forward lamp breakout)
S201
S202
S211
S216
Sealed beam headlamps
Start
Tan
Underhood fuse-relay center (on left side of engine compt)

HORN

Horn Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for Horn Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(4.3l) g119 (others) g110
(right front of engine) (left front of engine)
(steering column ground)
Diesel
Gasoline
Horn brush
Horn fuse 20a
Horn relay
Horn switch
Horns (left front of vehicle)
Hot at all times
Nca
S101
S103
S152 (4.3l, 5.0l, 5.7l only)
Turn signal switch
Underhood fuse/relay center

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram (1 of 2) for Chevrolet Chevy Express G1998 2500

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List of elements for Instrument Cluster Wiring Diagram (1 of 2) for Chevrolet Chevy Express G1998 2500:

(7 bulbs)
(engine harn, 14 cm from knock sensor) (4.3l) (engine harn, 11 cm from injector harn breakout) (5.0/5.7l) (engine harn, 10 cm from input shaft sensor) (7.4l) (engine harn, 4 cm from brake pressure differential switch) (6.5l diesel)
(not used)
A10
A11
A12
A13
A14
A15
A16
A17
Acc
Air bag ind
Anti-lock brakes system
Anti-lock brakes warning ind
B10
B11
B12
B13
B14
B15
B16
B17
Bat ind
Brake ind in
Brake pressure differential switch (part of electronic brake control module, left frame rail)
Brake psi
Brake tt
Brake warning ind
Check gauges ind
Check gauges lamp driver
Daytime running lamp control module (under left side of dash, taped to harness)
Diesel only
Diode-i d101
Drl lamp ind
Electronic brake control module (left frame rail, near center of vehicle)
Eng-i mini fuse 20a
Engine controls system
Engine coolant temperature gauge sender (left side of engine block)
Exterior lights system
Fuel gauge
G101 (right front of engine compt)
G110 (5.0, 5.7, 7.4l) (left front of engine)
G110 (6.5l) (left front of engine)
G119 (4.3l) (right front of engine)
G119 (4.3l) (right frt of engine)
G200 (behind left kick panel)
Gauges fuse 4 10a
Gnd
Headlights system
High beam ind
Hot in run or start
I/p fuse block (lower left kick panel)
Ign
Ign feed
Ignition switch
Illumin- ation lamps
Ind ctrl
Instrument cluster
Interior lights system
Left turn ind
Lock
Low coolant ind (diesel)
Low engine coolant level indicator module (diesel only) (under left side of dash)
Low engine coolant level indicator sensor (diesel only) (under coolant recovery/surge tank)
Nca
Off
Oil press gauge
Park/neutral position & backup lamp switch (left side of transmission)
Pk brake
Pnk
Prndl circuit board
Right turn ind
Run
S101
S102
S112
S118
S130
S156
S201
S202
S216
Safety belt ind
Service engine soon ind
Service throttle soon ind (diesel)
Solid state
Speedometer/ odometer
Start
Starting/charging system
Tan
Temp gauge
Underhood fuse-relay center (left front fender)
Volt- meter
Wait ind (diesel)
Warning system engine controls system
Water in fuel ind (diesel)
Water-in-fuel sensor (diesel only) (left frame rail, near center of vehicle)

Instrument Cluster Wiring Diagram (2 of 2) for Chevrolet Chevy Express G1998 2500

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List of elements for Instrument Cluster Wiring Diagram (2 of 2) for Chevrolet Chevy Express G1998 2500:

(below right
(i/p harn, approx 21 cm from hvac switch breakout) s247
+5v ref
1.5k
Anti-lock brakes system
Batt
Diesel
Engine oil pressure indicator sender (top rear of engine)
Evo/passlock module (behind left side of dash)
Fuel lev
Fuel pump and sender (in fuel tank)
Fuel pump switch & engine oil pressure gauge sensor (top rear of engine)
Fuel sender buffer module
Fuel sig
Fuel tank level sender (in fuel tank)
G110 (left front of engine)
G116 (under brake master cylinder)
Gasoline
Gauge ctrl
Gnd
Hot in acc or run
Hot in run
I/p fuse block (lower left kick panel)
Ign
Ignition
Inline diode d202 (near park brake switch)
Low flow
Low pres.
P/b booster fluid flow alarm
P/b booster fluid flow alarm switch
P/b booster fluid flow and pressure alarm delay module
P/b booster fluid pressure alarm switch
Park brake warning switch
Pnk
Powertrain control module (behind center of dash)
Radio, electronic power steering system
Radio-i fuse 17 10a
Resistor r208 (w/ uj1) (near i/p fuse block)
S112
S220
S238 (i/p harn, 4 cm from cluster breakout)
S246 (i/p harn, approx 25 cm from hvac switch breakout)
Sens gnd
Side of dash)
Sig in
Sw sense
Tan
Trans fuse 24 10a
Twisted pair
Vehicle control module (on left radiator support)
Vehicle speed sensor (left side of transmission)
Vehicle speed sensor buffer (diesel only) (below dash, near steering column)
Vss out
Vss rtn
Vss sig
W/ p/b booster warning option, rpo code-uj1

INTERIOR LIGHTS

Interior Light Wiring Diagram (1 of 3) for Chevrolet Chevy Express G1998 2500

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List of elements for Interior Light Wiring Diagram (1 of 3) for Chevrolet Chevy Express G1998 2500:

(base only)
(base: crossbody harn, 9-17 cm from in-line conn breakout, toward power door lock relay breakout)
(base: left body harn, 39 cm from in-line conn at front left interior roof panel)
(crossbody harn, approx 16 cm from inline conn, toward power door lock relay breakout)
(i/p harn, 11 cm from breakout to headlamp switch)
(i/p harn, 4 cm
(left body harn, 7 cm from in-line conn breakout toward left stepwell lmp breakout)
(left kick panel)
(right body harn, 13 cm from side door jamb switch breakout)
(right body harn, 33 cm from stepwell lamp breakout toward roof)
(right body harn, 7 cm from side door jamb switch breakout)
(under left side of dash) convenience center
(upfitter: left body harn, approx 150 cm from convenience center breakout)
A nca
Ash- tray lamp
B2 c210
Base
Battery
Bright adjust
C202
C210
C210 c1
C210 c6
Center dome and reading lamp (reading lamps w/ tr9 option)
Convenience center (under left side of dash)
Csty fuse 3 20a
Dome lamp
Dome lamp defeat switch
Dome switch
E10
From breakout to headlamp switch)
Front dome and reading lamp (reading lamps w/ tr9 option)
G200
G200 (behind left kick panel)
G200 (left kick panel)
G203 (right kick panel)
G403 (right rear interior, behind rear wheelhouse)
Gauges fuse 4 10a
Ground
Headlamp switch
Hot at all times
Hot in run and start
I/p compart- ment lamp
I/p fuse block
Ignition
Illuminated entry module (on right lower kick panel)
Jamb sw
Lamp
Left front door jamb switch
Left front power door lock switch
Left front power side window switch
Left stepwell lamp (w/ tr9 option)
Left sunshade mirror lamp
Nca
Non base
Non base only
Non base upfitter prov.
Parade mode switch
Park lps fuse 9 20a
Park switch
Pnk
Power door lock control module (on left kick panel)
Power mirrors system
Pwr accy fuse a 25a
Reading lamps
Rear dome and reading lamp (reading lamps w/ tr9 option)
Rear door jamb switch
Right front door jamb switch
Right front power door lock switch
Right front power side window switch
Right stepwell lamp (w/ tr9 option)
Right sunshade mirror lamp
S201
S204
S205
S206
S216
S221
S225
S226
S227
S228
S230
S240
S303
S305
S306
S308
S309
S316 (w/o power door locks only)
S406
S500
S501
S601
S603
S904
Side door jamb switch
Side stepwell lamp (w/ tr9 option)
To i/p fuse block (diagram 3 of 3)
To s224 (diagram 3 of 3)
W/ power door locks
W/o keyless entry
W/o power door locks

Interior Light Wiring Diagram (2 of 3) for Chevrolet Chevy Express G1998 2500

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List of elements for Interior Light Wiring Diagram (2 of 3) for Chevrolet Chevy Express G1998 2500:

(base only)
(base: left body harn, approx 39 cm from inline conn at frt interior roof panel)
(behind left kick panel)
(cross body harn, 16 cm from power door lock relay breakout)
(cross body harn, 9-17 cm from in-line conn breakout, toward power door lock relay breakout)
(i/p harn, 11 cm from breakout to headlamp switch)
(i/p harn, 4 cm
(left body harn, 6 cm from in- line conn breakout, at left front interior roof panel)
(lf door harn, 7 cm from power window switch breakout)
(rf door harn, 5 cm from power window switch breakout)
(right rear wheelhouse)
(upfitter: left body harn, approx 150 cm from convenience center breakout)
(w/o up)
(w/o up) (w/ up)
(w/o up: right body harn, 13 cm from side door jamb switch breakout)
(w/o up: right body harn, 7 cm from side door jamb switch breakout; w/ up: cross body harn, 16 cm from power door lock relay breakout)
(w/up)
(w/up: cross body harn, 14 cm from power door lock relay breakout)
1995 vftc c
A nca
Ash- tray lamp
Base
Battery
Bright adjust
C202
C210
Center dome and reading lamp (reading lamps w/ tr9 option)
Convenience center (under left side of dash)
Csty fuse 3 20a
Dome lamp
Dome lamp defeat switch
Dome switch
E10
From breakout to headlamp switch)
Front dome and reading lamp (reading lamps w/ tr9 option)
G200
G200 (behind left kick panel)
G203 (right kick panel)
G403
Gauges fuse 4 10a
Ground
Headlamp switch
Hot at all times
Hot in run or start
I/p compart- ment lamp
I/p fuse block
Ignition
Jamb sw
Lamp
Left front door jamb switch
Left front power door lock switch
Left front power side window switch
Left stepwell lamp (w/ tr9 option)
Left sunshade mirror lamp
Nca
Non base
Non base only
Parade mode switch
Park lps fuse 9 20a
Park switch
Pnk
Power door lock control module (on left kick panel)
Power mirrors system
Pwr accy fuse a 25a
Reading lamps
Rear dome and reading lamp (reading lamps w/ tr9 option)
Rear door jamb switch
Remote control door lock receiver (right kick panel)
Right front door jamb switch
Right front power door lock switch
Right front power side window switch
Right stepwell lamp (w/ tr9 option)
Right sunshade mirror lamp
S201
S204
S205
S206
S216
S221
S225
S226
S227
S228
S230
S232
S240
S305 s230
S306
S308
S309
S406
S500
S501
S601
S904
Side door jamb switch
Side stepwell lamp (w/ tr9 option)
To i/p fuse block (diagram 3 of 3)
To s224 (diagram 3 of 3)
Up=upfitter provision)
Upfitter prov.
W/ keyless entry
W/ up
W/o up

Interior Light Wiring Diagram (3 of 3) for Chevrolet Chevy Express G1998 2500

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List of elements for Interior Light Wiring Diagram (3 of 3) for Chevrolet Chevy Express G1998 2500:

(4.3l) g119 (right front of engine)
(aux htr & a/c harn, approx 7 cm from rr aux hvac module breakout) s310
(i/p harn, 15 cm from breakout to headlamp switch)
(i/p harn, approx 17 cm from radio breakout) s223
1995 vftc c
Auxiliary blower motor switch
Auxiliary heat
Auxiliary heat w/a/c
B12
B13
Base
C202
Cargo
Convenience center (under left side of dash)
Dim
From headlamp switch (diagram 1 0f 3 or 2 of 3)
Front auxiliary hvac control module
G110 (all others) (left front of engine)
G125 (front of engine, near thermostat housing)
G200 (behind left
G402 (left rear interior, behind rear wheel house)
Heater and a/c controller
Horn fuse 20a
Hot at all times
I/p fuse block
Illum fuse 14 10a
Instrument cluster
Kick panel)
Multi function alarm module
Non base
Odometer
Passenger
Prndl
Radio
Radio b fuse 19 10a
Rear auxiliary hvac control module
Remote cd player
S104
S112
S1219
S127
S148
S201
S202
S224
S318
S400
Under- hood lamp
Under- hood reel lamp
Underhood fuse-relay center

POWER ANTENNA

Power Antenna Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for Power Antenna Wiring Diagram for Chevrolet Chevy Express G1998 2500:

G200 (behind left kick panel)
Hot at all times
I/p fuse block (on left lower
Pnk
Power antenna assembly (right front fender)
Radio
Radio-b fuse 19 10a
S202
S219
Side of dash)
Solid state

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 4) for Chevrolet Chevy Express G1998 2500

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List of elements for Power Distribution Wiring Diagram (1 of 4) for Chevrolet Chevy Express G1998 2500:

(crossbody harness, approx 4 cm from convenience center conn breakout)
(i/p harness, approx 18cm from bulkhead connector)
(i/p harness, approx 24cm from bulkhead connector) s213
(i/p harness, approx 4 cm from bulkhead connector)
(rear a/c harness, approx 13 cm from blower motor resistor/ relay breakout)
(rear a/c harness, approx 7cm from blower motor resistor breakout)
(rear aux htr and a/c harness, approx 29cm from rear aux hvac module breakout)
(upfitter provision harn, left side red
(upfitter provisions harness, left side of dash)
A13
Abs fuse 60a
Acc
Ambulance
Aux-a fuse 30a
Aux-b fuse 30a
Auxiliary battery
Auxiliary blower motor high speed relay
Auxiliary blower motor low speed relay
Auxiliary blower motor medium speed relay
Battery
Battery junction block
Blower fuse 60a
Blower motor resistor relay
Brake fuse 18 10a
C202
C206
C210
C302
Convenience center
Crank fuse 8 10a
Cruise control module (gasoline)
Cruise control switch
Cruise fuse 6 10a
Diesel
Electronic brake control module
Engine harn, near bulkhead connector)
From aux-a fuse (diagram 1 of 4)
Front auxiliary hvac control module
Fusible link (10 ga- rust)
Fusible link (10 ga-rust)
G200 (left kick panel)
Gasoline
Generator
Glowplug relay
Heater and a/c control logic module
Heater and a/c controller
Htr a/c fuse 12 20a
I/p fuse block
Ign-a fuse 40a
Ign-b fuse 50a
Ignition switch
Inline fuse 30a
Left front power side window switch
Lock
Nca
Of dash)
Off
P/b booster fluid flow alarm
Park/ neutral position switch
Passenger
Pnk
Pwr wdo fuse 25a
Radio
Radio 1 fuse 17 10a
Rear auxiliary hvac control module
Rear auxiliary mode valve and seal assembly
Rear auxiliary temperature valve assembly
Red
Resistor
Right front power side window switch
Rr blower fuse 30a
Rr hvac fuse 24 10a
Run
S122
S134
S201
S210
S220
S229
S307
S311
S312
S404
S405
S412
Start
Starter relay
Starter solenoid
Tcc/ stoplamp switch
Tcc/stoplamp switch breakout)
Temperature valve actuator motor
To s214 (diagram 3 of 4)
To trans fuse (diagram 4 of 4)
To underhood fuse-relay center (diagram 2 of 4)
To upfitter provision relay (diagram 1 of 4)
Trailer wiring provision
Underhood fuse-relay center
Upfitter provision connector
Upfitter provision relay (behind left b pillar)
Vehicle control module (gasoline)
W/ rear a/c
W/ uj1 brake warning
W/ upfitter provisions
Windshield washer/ wiper switch
Windshield wiper motor
Wiper fuse 11 25a

Power Distribution Wiring Diagram (2 of 4) for Chevrolet Chevy Express G1998 2500

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List of elements for Power Distribution Wiring Diagram (2 of 4) for Chevrolet Chevy Express G1998 2500:

(6.5l, 5.0l, 5.7l-engine harness, approx 11-19 cm from bulkhead connector, 4.3l, 7.4l-engine harness, approx 65cm from underhood fuse relay center) s127
(crossbody harness, approx 14 cm from power door lock relay breakout) s232
(crossbody harness, left side of dash)
(gasoline-engine harness, approx 4-19 cm from bulkhead connector, diesel-engine harness, approx 4 cm into main harness breakout)
(i/p harness, 4cm from radio breakout)
(i/p harness, 7cm from instrument cluster breakout)
(i/p harness, approx 37 cm from bulkhead connector) s212
(i/p harness, approx 4 cm into power seat harness breakout)
(i/p harness, approx 8 cm into i/p relay center breakout)
(i/p harness, approx 9cm from radio breakout) s227
(right body harness, approx 13 cm from side door jamb switch breakout)
(right body harness, approx 7 cm from power seat switch breakout)
(sun shade illum mirror harness, approx 7 cm from right sun shade lamp breakout)
(underhood lamp harness, approx 11 cm from reel lamp connector breakout) s148
(upfitter provision-left body harness, 150cm from convenience center connector others-left body harness, behind left "b" pillar
A/c compressor enable relay
A/c fuse 20a
Auxiliary power outlet
Bat fuse 50a
C13
C202
C210
Center dome lamp
Cig ltr fuse 13 20a
Cigarette lighter
Convenience center
Ctsy fuse 3 20a
D13
Data link connector
Daytime running lamps diode module
Drl fuse 15 15a
Ecm-b fuse 20a
Evo passlock module
From underhood b fuse-relay center (diagram 1 of 4)
From underhood fuse-relay center (diagram 1 of 4)
Front dome lamp
Fuel pump relay
Fuel pump switch and engine oil pressure gauge sensor
G200 (left kick panel)
Hazard fuse 5 20a
Hazard warning switch
Headlamp switch
Heater and a/c controller
Horn fuse 20a
Horn relay
Htd mir fuse 2 20a
I/p compartment lamp
I/p fuse block
Illuminated entry module
Left front power door lock switch
Left power seat switch
Left stepwell lamp
Left sun shade mirror lamp
Lighting maxi- fuse 40a
Multi- function alarm module
Nca
Others
Park lps fuse 9 20a
Power antenna assembly
Power door lock control module
Power door lock relay
Power outside rear view mirror remote control switch
Powertrain control module (diesel)
Pwr accy fuse a 25a
Pwr aux fuse 7 25a
Radio
Radio-b fuse 19 10a
Rear dome lamp
Red
Remote control door lock receiver
Right front power door lock switch
Right power seat switch
Right rear power door lock switch
Right stepwell lamp
Right sun shade mirror lamp
S120
S205
S211 (i/p harness, approx 23 cm into headlamp switch breakout)
S218
S219
S221
S222
S300
S308
S309
S406
Security strg fuse 21 10a
Side stepwell lamp
Stop fuse 1 20a
Tcc/stop lamp switch
Underhood fuse-relay center
Underhood lamp
Underhood reel lamp
Vehicle control module (gasoline)
W/ upfitter provisions
W/o keyless entry
W/o upfitter provissions

Power Distribution Wiring Diagram (3 of 4) for Chevrolet Chevy Express G1998 2500

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List of elements for Power Distribution Wiring Diagram (3 of 4) for Chevrolet Chevy Express G1998 2500:

(engine harness, 117cm from underhood fuse-relay center)
(engine harness, appprox 12cm from right heated oxygen sensor breakout)
(engine harness, approx 11 cm into main harness breakout)
(engine harness, approx 15 cm into fuel injector harness breakout)
(engine harness, approx 4 cm from egr valve breakout) 5.0l, 5.7l
(engine harness, approx 4 cm from fuel injector harness breakout)
(engine harness, approx 6 cm from map sensor breakout)
(engine harness, approx 8 cm from fuel injector harness breakout)
(engine harness, approx 8 cm into fuel injector harness breakout)
(engine harness, top left of engine)
(engine jumper harness, approx 2 cm from optical fuel temperature sensor breakout)
(engine jumper harness, approx 4 cm into engine shutoff solenoid breakout)
(i/p harness, approx 17 cm from bulkhead connector) s214
(o2s jumper harness, 35 cm from breakout to connector near starter)
(o2s jumper harness, approx 22 cm from connector breakout near starter)
(o2s jumper harness, approx 66 cm from connector breakout near starter)
4.3l
5.0l, 5.7l
6.5l
7.4l
A/c compressor enable relay
C11
C12
Camshaft position sensor
Crankshaft position sensor
Diesel
Ecm-1 fuse 20a
Eng-1 fuse 20a
Engine shut off solenoid
Evap emission canister purge valve
Evaporative emission canister purge valve
Evaporative emission vent valve
Evaporative emissions vent valve
From ignition switch (diagram 1 of 4)
Fuel heater
Fuel injectors 1, 3 & 5
Fuel injectors 1, 3, 5 & 7
Fuel injectors 1, 3, 5, & 7
Fuel injectors 2, 4 & 6
Fuel injectors 2, 4, 6 & 8
Fuel injectors 2, 4, 6, & 8
Fuel sol fuse 20a
Fuel solenoid driver
Glow plug relay
Heated oxygen sensor, bank 1 sensor 1
Heated oxygen sensor, bank 1 sensor 2
Heated oxygen sensor, bank 1 sensor 3
Heated oxygen sensor, bank 2 sensor 1
Heated oxygen sensor, bank 2 sensor 2
Ign-e mini fuse 20a
Ignition coil
Ignition control module
Mass air flow sensor
Pnk
Pnk (engine harness, 4cm from bulkhead connector breakout) s126
Pnk (engine harness, approx 5 cm from ckp sensor breakout) s130
Pnk s304
Powertrain control module
S107
S108
S117 pnk
S130
S131
S132
S132 pnk
S133 pnk
S304
Secondary air injection pump relay
To i/p fuse block (diagram 4 of 4)
Underhood fuse-relay center
Vehicle control module
Waste gate solenoid
Water in fuel indicator sensor

Power Distribution Wiring Diagram (4 of 4) for Chevrolet Chevy Express G1998 2500

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List of elements for Power Distribution Wiring Diagram (4 of 4) for Chevrolet Chevy Express G1998 2500:

(i/p harness, approx 30 cm from bulkhead connector) s217
(i/p harness, approx 4 cm from breakout to connector at base of steering column) s216
Air bags fuse 10 10a
Automatic transmission
B10
B17
C210
Convenience center
Daytime running lamp control module
Daytime running lamps relay
Evo passlock module
From ignition switch (diagram 1 of 4)
From s214 (diagram 3 of 4)
Fuel sender buffer module
Gauges fuse 4 10a
Hazard warning switch
Headlamp switch
I/p fuse block
I/p relay center
Illum fuse 14 10a
Illuminated entry module
Inflatable restraint control module
Instrument cluster
Interior lights system
Interior lights system (i/p dimmer switch)
Low engine coolant level indicator module (diesel)
Multi- function alarm module
Park/neutral position switch
Pnk
Remote control door lock receiver
Trans fuse 20 10a
Turn b/u fuse 16 20a
Vehicle speed sensor buffer (diesel)
W/ keyless entry
W/o keyless entry

POWER DOOR LOCKS

Door Lock Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for Door Lock Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(crossbody harn, near power lock relay breakout) s243
Base models
Battery (b+)
Convenience center (left side of dash)
G200 (left kick panel)
Ground
Harness breakout)
Hot at all times
I/p fuse block (left side of dash)
Left door lock switch
Left front door lock actuator
Lock
Lock sig
Power door lock control module (left kick panel)
Power door lock relay (behind right center of dash)
Pwr accy fuse a 25a
Rear door lock actuator
Rear door lock switch
Right door lock switch
Right front door lock actuator
S206
S221
S228
S241 (crossbody harness, near power lock relay breakout)
S242 (crossbody harn, near power lock relay breakout)
S244 (crossbody harn, near power lock relay breakout)
S300
S314 (right body harness, 26cm from side door jamb switch harn breakout)
Side door contactor (right "b" pillar)
Side door jamb switch
Side door lock actuator
Side door sw
Tan
Unlock
Unlock sig
Upfitter package

Keyless Entry Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for Keyless Entry Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(crossbody harn, near power lock relay breakout) s243
(right body harness, 7cm from power seat switch breakout) (w/ passenger power seat only) s300
Base models
Batt (b+)
Battery (b+)
Convenience center (left side of dash)
Data link connector (under left side of dash)
Dome lamps
Dome lmp off
Driver dr unlk
G200 (left kick panel)
Gauges fuse 4 10a
Ground
Hot at all times
Hot in run, bulb test or start
I/p fuse block (left side of dash)
Ignition
Interior lights system
Left door lock switch
Left front door lock actuator
Lock
Lock out
Lock sig
Pass drs unlk
Pnk
Power door lock control module (left kick panel)
Power door lock relay (behind right center of dash)
Program sig
Pwr accy fuse a 25a
Rear door lock actuator
Remote control door lock receiver (upper right kick panel)
Right door lock switch
Right front door lock actuator
Right rear door lock switch
Rr door unlk
S206
S216
S221
S228
S241 (crossbody harness, near power lock relay breakout)
S242 (crossbody harn, near power lock relay breakout)
S244 (crossbody harness, near power lock relay breakout)
S303 (w/ pwr pass seat)
S315 (right body harn, 19cm from side door jamb switch harness breakout)
Side door contactor (right "b" pillar)
Side door jamb switch
Side door lock actuator
Side door sw
Tan
Unlock
Unlock in
Unlock sig
Upfitter package

POWER MIRRORS

Power Mirror Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for Power Mirror Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(behind left kick panel) g200
(crossbody harn, approx 14 cm from power door lock relay breakout) s232
(left front door harness, approx 15 cm from power mirror motor connector)
(right front door harness, approx 15 cm from power mirror switch connector)
C210
Convenience center (under left side of dash)
Ctsy fuse 3 20a
Hot at all times
I/p fuse block
Interior lights system
Left mirror
Left power outside rearview mirror
Power outside rearview mirror remote control switch
Right mirror
Right power outside rearview mirror
Right/ left motor
S227
S500
S502
S604
Up/ down motor
W/ upfitter provisions
W/o upfitter provisions

POWER SEATS

6-Way Power Seat Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for 6-Way Power Seat Wiring Diagram for Chevrolet Chevy Express G1998 2500:

All- down
All-up
Back
C210 d2
Convenience center (under left side of dash)
Down
Entire seat
For- ward
Front down
Front up
G200 (behind left kick panel)
G403 (right rear interior, behind rear wheel house)
Hot at all times
I/p fuse block
Left power seat forward/ rearward motor
Left power seat front tilt motor
Left power seat rear tilt motor
Left power seat switch
Left seat adjuster motor assembly
Nca
Pwr accy fuse a 25a
Rear down
Rear up
Red
Right power seat forward/ rearward motor
Right power seat front tilt motor
Right power seat rear tilt motor
Right power seat switch
Right seat adjuster motor assembly
S201
S221
S228
S300
S303
Tan

POWER WINDOWS

Power Window Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for Power Window Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(left kick panel) g200
C210
Convenience center (left side of dash)
Driver window motor
Driver window switch
Front passenger window motor
Front passenger window switch
Hot in accy & run
I/p fuse block (on lower left kick panel)
Interior lights system
Left
Power wdo fuse b 25a
Right
S229
S500
Tan

RADIO

Radio Wiring Diagrams for Chevrolet Chevy Express G1998 2500

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List of elements for Radio Wiring Diagrams for Chevrolet Chevy Express G1998 2500:

(left front door harn, approx 13cm from radio speaker breakout) s504
(left front door harn, approx 7cm from radio speaker breakout) s503
(right body harn, near center high mounted stoplamp breakout) s423
(right body harn, near center high mounted stoplamp breakout) s424
Antenna
Anti-theft system
Audio rtn
Base
Battery
Convenience center (left side of dash)
Diesel
Dim ctrl
Dim sig in
Dim sig out
Drain
E&c line
Except
G200 (behind left kick panel)
Gasoline
Ground
Hot at all times
Hot in acc or run
I/p fuse block
Ignition
Illuminaton
Interior lights system
Left front door speaker
Left front door tweeter speaker
Left overhead speaker
Left rear door speaker
Lf +
Lf -
Line
Lr +
Lr -
Lt input
Lt output
Nca
Pnk
Power antenna assembly
Premium
Pwr antenna
R14 in
R14 out
Radio
Radio i fuse 17 10a
Radio-b fuse 19 10a
Red
Remote compact disk player (below radio)
Rf +
Rf -
Right front door speaker
Right front door tweeter speaker
Right overhead speaker
Right rear door speaker
Rr +
Rr -
Rt input
Rt output
S202
S219
S220
S239 (i/p harn, approx 10cm into radio breakout)
S407 (left body harn near left "b" pillar)
S419 (left body harn, near left "b" pillar)
S605 (right front door harn, approx 7cm from power window motor breakout)
S606 (right front door harn, approx 4cm from power window motor breakout)
Tan
Vehicle control module (left side of engine compt)
Vehicle speed sensor buffer (below dash, near steering column)
Vss signal
W/ upfitter
W/o upfitter

SHIFT INTERLOCKS

Shift Interlock Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for Shift Interlock Wiring Diagram for Chevrolet Chevy Express G1998 2500:

A/t shift lock solenoid (right side of steering column)
G200 (behind left kick panel)
Hot in run and start
I/p fuse block
Park/neutral position switch (left side of transmission) c1
Pnk
S201
S217
Tcc/stoplamp switch (on brake pedal support)
Turn b/u fuse 16 20a
Turn signal switch

STARTING/CHARGING

4.3L

4.3L (VIN W), Charging Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for 4.3L (VIN W), Charging Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(100a) (124a)
(left side of engine compt)
(not used)
(right front of engine compt)
B16
B17
Battery
Battery junction block (next to radiator)
Battery lamp
Fusible link (10 ga-rust)
G100
G101
Gauges fuse 4 10a
Generator (w/ambulance package)
Hot at all times
Hot in run or start
I/p fuse block
Instrument cluster
L generator
Pnk
Power distribution system
Red
S158 (w/ambulance pkg) (engine harness, 4 cm from breakout to a/c compressor)
S216
Starting circuit
Stud

4.3L (VIN W), Starting Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for 4.3L (VIN W), Starting Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(5.0l, 5.7l, 7.4l-left front of engine, 4.3l-right front of engine)
(left side of eng. compt.)
(left side of trans.) park/neutral position switch
(right front of eng. compt.)
Accy
Battery
Battery stud
Bulb test
Charging circuit
Crank fuse 8 10a
Fusible link (10 ga- rust)
Fusible link (10 ga-rust)
G100
G101
G110 (5.0l, 5.7l, 7.4l) g119 (4.3l)
Hold- in coil
I/p fuse block (lower left kick panel)
Ign a maxifuse 40a
Ignition switch
Lock
Off
Pull- in coil
Red
Run
S103
S125
Start
Starter motor
Starter relay (in underhood fuse-relay center)
Starter solenoid
Underhood fuse-relay center

5.0L

5.0L (VIN M), Charging Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for 5.0L (VIN M), Charging Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(100a) (124a)
(left side of engine compt)
(not used)
(right front of engine compt)
B16
B17
Battery
Battery junction block (next to radiator)
Battery lamp
Fusible link (10 ga-rust)
G100
G101
Gauges fuse 4 10a
Generator (w/ambulance package)
Hot at all times
Hot in run or start
I/p fuse block
Instrument cluster
L generator
Pnk
Power distribution system
Red
S158 (w/ambulance pkg) (engine harness, 4 cm from breakout to a/c compressor)
S216
Starting circuit
Stud

5.0L (VIN M), Starting Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for 5.0L (VIN M), Starting Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(5.0l, 5.7l, 7.4l-left front of engine, 4.3l-right front of engine)
(left side of eng. compt.)
(left side of trans.) park/neutral position switch
(right front of eng. compt.)
Accy
Battery
Battery stud
Bulb test
Charging circuit
Crank fuse 8 10a
Fusible link (10 ga- rust)
Fusible link (10 ga-rust)
G100
G101
G110 (5.0l, 5.7l, 7.4l) g119 (4.3l)
Hold- in coil
I/p fuse block (lower left kick panel)
Ign a maxifuse 40a
Ignition switch
Lock
Off
Pull- in coil
Red
Run
S103
S125
Start
Starter motor
Starter relay (in underhood fuse-relay center)
Starter solenoid
Underhood fuse-relay center

5.7L

5.7L (VIN R), Charging Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for 5.7L (VIN R), Charging Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(100a) (124a)
(left side of engine compt)
(not used)
(right front of engine compt)
B16
B17
Battery
Battery junction block (next to radiator)
Battery lamp
Fusible link (10 ga-rust)
G100
G101
Gauges fuse 4 10a
Generator (w/ambulance package)
Hot at all times
Hot in run or start
I/p fuse block
Instrument cluster
L generator
Pnk
Power distribution system
Red
S158 (w/ambulance pkg) (engine harness, 4 cm from breakout to a/c compressor)
S216
Starting circuit
Stud

5.7L (VIN R), Starting Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for 5.7L (VIN R), Starting Wiring Diagram for Chevrolet Chevy Express G1998 2500:

(5.0l, 5.7l, 7.4l-left front of engine, 4.3l-right front of engine)
(left side of eng. compt.)
(left side of trans.) park/neutral position switch
(right front of eng. compt.)
Accy
Battery
Battery stud
Bulb test
Charging circuit
Crank fuse 8 10a
Fusible link (10 ga- rust)
Fusible link (10 ga-rust)
G100
G101
G110 (5.0l, 5.7l, 7.4l) g119 (4.3l)
Hold- in coil
I/p fuse block (lower left kick panel)
Ign a maxifuse 40a
Ignition switch
Lock
Off
Pull- in coil
Red
Run
S103
S125
Start
Starter motor
Starter relay (in underhood fuse-relay center)
Starter solenoid
Underhood fuse-relay center

SUPPLEMENTAL RESTRAINTS

Supplemental Restraint Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for Supplemental Restraint Wiring Diagram for Chevrolet Chevy Express G1998 2500:

A16
Air bag indicator
Air bags fuse 10 10a
B nca
B17
Bar
Data line
Data link connector (left side of dash)
Driver side high
Driver side low
G200 (behind left kick panel)
G200 (left kick panel)
Gauges fuse 4 10a
Hot in run and start
I/p fuse block (lower left kick panel)
Ignition
Indicator ctrl
Inflatable restraint diagnostic resistor
Inflatable restraint front end discriminating sensor (on front of vehicle)
Inflatable restraint i/p module
Inflatable restraint sensing and diagnostic module (under left front seat)
Inflatable restraint steering wheel module
Inflatable restraint steering wheel module coil
Instrument cluster
Lf seat belt input
Multi-function alarm module (under left side of dash)
Nca
Pass side high
Pass side low
Pnk
S201 (dash harn, near breakout to park brake warning sw)
S208 (dash harn, in breakout to sdm)
S209 (dash harn, in breakout to sdm)
S216 (dash harn, near breakout to instr cluster)
Seat belt sig
Seat belt switch
Sensor feed
Shorting
Shorting bar
Sir ground
Tan
W/ pass sir
W/o pass sir

TRANSMISSION

4.3L

4.3L (VIN W), Transmission Wiring Diagram, 4L60-E/4L80-E for Chevrolet Chevy Express G1998 2500

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List of elements for 4.3L (VIN W), Transmission Wiring Diagram, 4L60-E/4L80-E for Chevrolet Chevy Express G1998 2500:

(4.3l) g119 (5.0l/5.7l/7.4l) g117 (right front of engine-4.3l) (right rear of engine- 5.0l/5.7l/7.4l)
(4l60-e only)
(4l60-e) s
(4l80-e)
(4l80-e) u
(5.0l/5.7l only)
(eng harn, 15 cm from fuel inj breakout)
(engine harn) s136
(twisted wire pair)
1-2 shift sol
1-2 shift solenoid
2-3 shift sol
2-3 shift solenoid
3-2 ctrl solenoid
3-2 downshift sol
5v reference
A/t iss hi
A/t iss lo
Automatic transmission (4l60-e/4l80-e)
Automatic transmission input shaft speed sensor (w/ 4l80-e) (left side of transmission)
B17
Battery in
Brake fuse 18 10a
Brake switch input
Data class ii
Data link connector (partial) (under left side of dash)
Ecm-1 fuse 20a
Ecm-b fuse 20a
Ect sens input
Electronic brake control module
Engine controls system
Engine coolant temperature sensor (top front of engine)
Fuel injectors & ignition coil)
Fuel injectors (5.0l/5.7l)
Fuel pump relay & fuel pump switch
Fuel sender buffer module, power steering control module, remote control door lock receiver & headlamp swich
Gauges fuse 4 10a
Hot at all times
Hot in off, run or start
Hot in run
Hot in run or start
I/p fuse block
Ignition in
Instrument cluster
Malfunction indicator lamp
Mil control
Pcm ground
Pcs sol hi out
Pcs sol lo out
Pnk
Press ctrl
Range signal "a"
Range signal "b"
Range signal "c"
Red
S102
S120
S122
S132
S133
S139 (engine harness, 4 cm from ect sensor breakout)
S153 (eng harn, 4 cm from a/c compressor breakout-4.3l) (eng harn, 8 cm from ign coil breakout-5.0l/5.7l) (eng harn, 4 cm from egr breakout-7.4l)
S154 (eng harn, 98 cm from uh fuse/relay center breakout-4.3l) (eng harn, 4 cm from from ign coil breakout-5.0l/5.7l) (eng harn, 3 cm from maf breakout-7.4l)
S210
S216
Sensor ground
Sensor return
Solenoid
Switch assembly
Tan
Tcc pwm sol
Tcc pwm solenoid
Tcc sol
Tcc solenoid
Tcc/abs/ cruise switch
Tcc/stop lamp switch (on brake pedal support)
Throttle position sensor (left top of engine) (4.3l/5.0l/5.7l) (right top of engine) (7.4l)
Tp sens input
Trans fluid temp sensor
Trans fuse 20 10a
Trans range pressure
Trans temp sig in
Underhood fuse/relay center
Vehicle control module (left side of engine compt)
Vehicle speed sensor (left side of transmission)
Vss hi
Vss lo

5.0L

5.0L (VIN M), Transmission Wiring Diagram, 4L60-E/4L80-E for Chevrolet Chevy Express G1998 2500

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List of elements for 5.0L (VIN M), Transmission Wiring Diagram, 4L60-E/4L80-E for Chevrolet Chevy Express G1998 2500:

(4.3l) g119 (5.0l/5.7l/7.4l) g117 (right front of engine-4.3l) (right rear of engine- 5.0l/5.7l/7.4l)
(4l60-e only)
(4l60-e) s
(4l80-e)
(4l80-e) u
(5.0l/5.7l only)
(eng harn, 15 cm from fuel inj breakout)
(engine harn) s136
(twisted wire pair)
1-2 shift sol
1-2 shift solenoid
2-3 shift sol
2-3 shift solenoid
3-2 ctrl solenoid
3-2 downshift sol
5v reference
A/t iss hi
A/t iss lo
Automatic transmission (4l60-e/4l80-e)
Automatic transmission input shaft speed sensor (w/ 4l80-e) (left side of transmission)
B17
Battery in
Brake fuse 18 10a
Brake switch input
Data class ii
Data link connector (partial) (under left side of dash)
Ecm-1 fuse 20a
Ecm-b fuse 20a
Ect sens input
Electronic brake control module
Engine controls system
Engine coolant temperature sensor (top front of engine)
Fuel injectors & ignition coil)
Fuel injectors (5.0l/5.7l)
Fuel pump relay & fuel pump switch
Fuel sender buffer module, power steering control module, remote control door lock receiver & headlamp swich
Gauges fuse 4 10a
Hot at all times
Hot in off, run or start
Hot in run
Hot in run or start
I/p fuse block
Ignition in
Instrument cluster
Malfunction indicator lamp
Mil control
Pcm ground
Pcs sol hi out
Pcs sol lo out
Pnk
Press ctrl
Range signal "a"
Range signal "b"
Range signal "c"
Red
S102
S120
S122
S132
S133
S139 (engine harness, 4 cm from ect sensor breakout)
S153 (eng harn, 4 cm from a/c compressor breakout-4.3l) (eng harn, 8 cm from ign coil breakout-5.0l/5.7l) (eng harn, 4 cm from egr breakout-7.4l)
S154 (eng harn, 98 cm from uh fuse/relay center breakout-4.3l) (eng harn, 4 cm from from ign coil breakout-5.0l/5.7l) (eng harn, 3 cm from maf breakout-7.4l)
S210
S216
Sensor ground
Sensor return
Solenoid
Switch assembly
Tan
Tcc pwm sol
Tcc pwm solenoid
Tcc sol
Tcc solenoid
Tcc/abs/ cruise switch
Tcc/stop lamp switch (on brake pedal support)
Throttle position sensor (left top of engine) (4.3l/5.0l/5.7l) (right top of engine) (7.4l)
Tp sens input
Trans fluid temp sensor
Trans fuse 20 10a
Trans range pressure
Trans temp sig in
Underhood fuse/relay center
Vehicle control module (left side of engine compt)
Vehicle speed sensor (left side of transmission)
Vss hi
Vss lo

5.7L

5.7L (VIN R), Transmission Wiring Diagram, 4L60-E/4L80-E for Chevrolet Chevy Express G1998 2500

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List of elements for 5.7L (VIN R), Transmission Wiring Diagram, 4L60-E/4L80-E for Chevrolet Chevy Express G1998 2500:

(4.3l) g119 (5.0l/5.7l/7.4l) g117 (right front of engine-4.3l) (right rear of engine- 5.0l/5.7l/7.4l)
(4l60-e only)
(4l60-e) s
(4l80-e)
(4l80-e) u
(5.0l/5.7l only)
(eng harn, 15 cm from fuel inj breakout)
(engine harn) s136
(twisted wire pair)
1-2 shift sol
1-2 shift solenoid
2-3 shift sol
2-3 shift solenoid
3-2 ctrl solenoid
3-2 downshift sol
5v reference
A/t iss hi
A/t iss lo
Automatic transmission (4l60-e/4l80-e)
Automatic transmission input shaft speed sensor (w/ 4l80-e) (left side of transmission)
B17
Battery in
Brake fuse 18 10a
Brake switch input
Data class ii
Data link connector (partial) (under left side of dash)
Ecm-1 fuse 20a
Ecm-b fuse 20a
Ect sens input
Electronic brake control module
Engine controls system
Engine coolant temperature sensor (top front of engine)
Fuel injectors & ignition coil)
Fuel injectors (5.0l/5.7l)
Fuel pump relay & fuel pump switch
Fuel sender buffer module, power steering control module, remote control door lock receiver & headlamp swich
Gauges fuse 4 10a
Hot at all times
Hot in off, run or start
Hot in run
Hot in run or start
I/p fuse block
Ignition in
Instrument cluster
Malfunction indicator lamp
Mil control
Pcm ground
Pcs sol hi out
Pcs sol lo out
Pnk
Press ctrl
Range signal "a"
Range signal "b"
Range signal "c"
Red
S102
S120
S122
S132
S133
S139 (engine harness, 4 cm from ect sensor breakout)
S153 (eng harn, 4 cm from a/c compressor breakout-4.3l) (eng harn, 8 cm from ign coil breakout-5.0l/5.7l) (eng harn, 4 cm from egr breakout-7.4l)
S154 (eng harn, 98 cm from uh fuse/relay center breakout-4.3l) (eng harn, 4 cm from from ign coil breakout-5.0l/5.7l) (eng harn, 3 cm from maf breakout-7.4l)
S210
S216
Sensor ground
Sensor return
Solenoid
Switch assembly
Tan
Tcc pwm sol
Tcc pwm solenoid
Tcc sol
Tcc solenoid
Tcc/abs/ cruise switch
Tcc/stop lamp switch (on brake pedal support)
Throttle position sensor (left top of engine) (4.3l/5.0l/5.7l) (right top of engine) (7.4l)
Tp sens input
Trans fluid temp sensor
Trans fuse 20 10a
Trans range pressure
Trans temp sig in
Underhood fuse/relay center
Vehicle control module (left side of engine compt)
Vehicle speed sensor (left side of transmission)
Vss hi
Vss lo

WARNING SYSTEMS

Warning System Wiring Diagrams for Chevrolet Chevy Express G1998 2500

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List of elements for Warning System Wiring Diagrams for Chevrolet Chevy Express G1998 2500:

(i/p harn, 39 cm into inflatable restraint sensing and diagnostic module breakout)
(left kick panel)
(right kick panel)
A12
Battery input
C200
C210
Convenience center (under left side of dash)
Fasten belts out
G200
G200 (left kick panel)
G203
Gages fuse 4 10a
Ground
Hazard fuse 5 20a
Hot at all times
Hot in park or head
Hot in run or start
I/p fuse block (on lower left kick panel)
Ignition on input
Illum fuse 14 10a
Instrument cluster
Key-in sw input
Key-in warning switch (inside steering column assembly)
Left front door jamb switch
Lights on input
Multi-function alarm module (under left side of dash)
Nca
Pnk
S201
S202
S206
S209
S216
S222
S223
S500
Safety belt input
Safety belt lamp
Seat belt switch (in seat belt buckle) (opens with belt buckled)
Tan
Upfitter package only

WIPER/WASHER

Wiper/Washer Wiring Diagram for Chevrolet Chevy Express G1998 2500

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List of elements for Wiper/Washer Wiring Diagram for Chevrolet Chevy Express G1998 2500:

G200 (behind left kick panel)
Hot in acc or run
I/p fuse block (lower left kick panel)
Inst wipe
Inst wipe k
Low
Mist
Mist off
Off
Pulse
Red
S134
S201
Solid state
Wash
Washer switch
Windshield washer pump motor (left front of engine compt, at washer reservoir)
Windshield washer/ wiper switch
Windshield wiper motor (on left side of firewall)
Wiper fuse 11 25a
Wiper switch