Harness Routing Views. Chevrolet Express 2001

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2001 🢒 Express 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Harness Routing Views

Figure 1:

4.3L Engine Harness, Right Side


(1)	G103
(2)	S156
(3)	S133
(4)	S132
(5)	S130

Figure 2:

6.5L Engine Harness Wiring, Right Side


(1)	C101
(2)	Engine Oil Pressure Sensor
(3)	S127
(4)	S158
(5)	G102
(6)	D103
(7)	S117
(8)	S120
(9)	S111
(10)	S146
(11)	S153
(12)	S109
(13)	S113

Figure 3:

6.5L Engine Harness Wiring, Right Rear


(1)	S107
(2)	Fuel Shut-off Solenoid Connector

Figure 4:

8.1L Engine Harness, Rear


(1)	G101
(2)	G102
(3)	G103
(4)	S176
(5)	S175

Figure 5:

8.1L Engine Harness, Front Right


(1)	Purge Valve
(2)	S103
(3)	S102
(4)	Electronic Throttle Control (ETC)
(5)	C125, C124 LH
(6)	Engine Coolant Temperature Sensor (ECT)

Figure 6:

Accessory Wiring Harness


(1)	C409
(2)	C415
(3)	P103
(4)	S322
(5)	S311
(6)	S312
(7)	C302
(8)	Upfitter Provision Relay

Figure 7:

Antenna


(1)	Antenna
(2)	P104

Figure 8:

Automatic Transmission, 4-Speed, 4L60-E


(1)	C103
(2)	Vehicle Speed Sensor (VSS)
(3)	Park/Neutral Position Switch
(4)	S101

Figure 9:

Automatic Transmission, 4-Speed, 4L80-E


(1)	Vehicle Speed Sensor (VSS)
(2)	S156
(3)	Park/Neutral Position Switch
(4)	Backup Lamp Switch - Part of Park/Neutral Position Switch
(5)	Automatic Transmission Input Shaft Speed (A/T ISS) Sensor
(6)	S101

Figure 10:

Auxiliary Heater and Air Conditioning Control Wiring


(1)	Rear Auxiliary HVAC Controller Connector
(2)	S318
(3)	Front Auxiliary HVAC Controller Connector
(4)	HVAC Control Processor - Auxiliary
(5)	S319
(6)	S320
(7)	S310
(8)	S307
(9)	S321
(10)	C405

Figure 11:

Auxiliary Heater and A/C Wiring


(1)	C407
(2)	Blower Motor High Speed Relay - Auxiliary
(3)	Blower Motor Medium Speed Relay - Auxiliary
(4)	Blower Motor Low Speed Relay - Auxiliary
(5)	Blower Motor - Auxiliary
(6)	S412
(7)	Mode Actuator - Auxiliary
(8)	S405
(9)	S411
(10)	Air Temperature Actuator - Auxiliary
(11)	S413
(12)	Blower Motor Resistor - Auxiliary
(13)	C408

Figure 12:

Body Wiring -- Dome Lamps, Rear Window Defroster Relay


(1)	S306
(2)	Front Dome Lamp
(3)	S404
(4)	S406
(5)	S429
(6)	S414
(7)	S415
(8)	Rear Window Defogger Relay
(9)	Rear Dome Lamp
(10)	S419
(11)	S407
(12)	S423
(13)	S424
(14)	Body Harness

Figure 13:

Bulkhead Connector


(1)	C100
(2)	P100
(3)	Underhood Fuse-Relay Center
(4)	S170
(5)	S165
(6)	S120
(7)	Powertrain Control Module (PCM)
(8)	S127

Figure 14:

C419


(1)	C419

Figure 15:

Convenience Center Connectors


(1)	C202
(2)	C207
(3)	C210

Figure 16:

Dome Lamp Wiring


(1)	C417
(2)	C405

Figure 17:

Electronic Brake Control Module


(1)	Electronic Brake Control Module (EBCM)
(2)	Ignition Feed - C1
(3)	Wheel Sensor - C2
(4)	Brake Pressure Differential Switch
(5)	Battery - C3

Figure 18:

Engine, Upper RH Side (5.0L, 5.7L)


(1)	S120
(2)	A/C Compressor Clutch
(3)	Exhaust Gas Recirculation (EGR) Valve
(4)	Engine Coolant Temperature (ECT) Sensor
(5)	S119
(6)	S122
(7)	S102
(8)	S154
(9)	S139
(10)	S127
(11)	Evaporative Emission (EVAP) Canister Vacuum Switch
(12)	C110
(13)	S156
(14)	Ignition Control Module
(15)	Ignition Coil
(16)	Fuel Injectors
(17)	Manifold Absolute Pressure (MAP) Sensor
(18)	S132
(19)	S133

Figure 19:

Entertainment Harness


(1)	Rear Video Screen
(2)	Front Video Screen Connector
(3)	RSA Controller Connector
(4)	Mirror, Homelink and Reading Lights Connectors
(5)	Accessory Power Outlet Connector
(6)	Gamebox
(7)	100-Watt Amplifier Connector
(8)	Base Box Connector
(9)	VCP Connector
(10)	C302
(11)	RSA-T Box
(12)	Entertainment Harness
(13)	Fuse Block - Rear

Figure 20:

Forward Lamp Wiring


(1)	G109
(2)	C111
(3)	C102
(4)	G108
(5)	S110
(6)	S142
(7)	S143, S151-Export
(8)	S144, S150 -Export
(9)	S135
(10)	S145
(11)	S118

Figure 21:

Forward Lamp Wiring, Horns


(1)	G108
(2)	C102
(3)	C111
(4)	R100

Figure 22:

Front Crossbody Wiring (Center)


(1)	C210
(2)	S245
(3)	S240
(4)	S241
(5)	S228
(6)	S242
(7)	S206
(8)	S244
(9)	S232
(10)	S243

Figure 23:

Front Crossbody Wiring (Left)


(1)	G200
(2)	C211
(3)	S229

Figure 24:

Front Crossbody Wiring (Right)


(1)	C212
(2)	C300

Figure 25:

Front Side Door Wiring, Left


(1)	Power Outside Rearview Mirror, Interface Cable
(2)	P500, P600 (Right)
(3)	C211, C212 (Right)
(4)	Radio Speaker, Left Door (Right Opposite)
(5)	S502, S604 (RT)
(6)	S500, S601 (RT)
(7)	S501, S603 (RT)
(8)	S504, S606 (RT)
(9)	S503, S605 (RT)

Figure 26:

Fuel Pump Wiring


(1)	C301
(2)	Electronic Brake Control Module (EBCM)
(3)	Fuel Lift Pump

Figure 27:

Generator Wiring


(1)	Generator, 105/130 Amp

Figure 28:

Glow Plug Controller (Federal)


(1)	Glow Plug Relay-Federal

Figure 29:

Inflatable Restraint Forward Wiring


(1)	C114

Figure 30:

Instrument Panel, Radio


(1)	Radio Antenna Lead
(2)	Radio
(3)	C204

Figure 31:

Instrument Panel Wiring


(1)	C206
(2)	S231
(3)	S221
(4)	S239
(5)	C208
(6)	C201
(7)	C405

Figure 32:

Instrument Panel Wiring, Forward of Dash


(1)	S161
(2)	S164
(3)	Powertrain Control Module
(4)	S163
(5)	S162
(6)	Underhood Relay Center

Figure 33:

Instrument Panel Wiring, Left Hand Carrier


(1)	Instrument Panel Console Connector
(2)	S218
(3)	S246
(4)	S247
(5)	S223
(6)	S251
(7)	S227
(8)	Vehicle Speed Sensor Buffer Module
(9)	S225
(10)	S222
(11)	S215
(12)	Radio Connector
(13)	HVAC Controller Connectors - C1, C2, C3

Figure 34:

Instrument Panel Wiring, Right Hand Carrier


(1)	C213

Figure 35:

IP Fuse Block Wiring


(1)	P103
(2)	C100
(3)	S220
(4)	S252
(5)	S214
(6)	S213
(7)	S212
(8)	G202
(9)	S217
(10)	G201

Figure 36:

Left Body Wiring


(1)	G400
(2)	C404
(3)	C411
(4)	C408
(5)	C407
(6)	C406
(7)	C402
(8)	G401
(9)	C401
(10)	G402
(11)	S409
(12)	S402
(13)	S401
(14)	S400

Figure 37:

LH Wiring View


(1)	C215
(2)	C209
(3)	S306

Figure 38:

Oxygen Sensor Wiring (5.0L, 5.7L, 8.1L Engines)


(1)	Heated Oxygen Sensor Bank 1, Sensor 2
(2)	Heated Oxygen Sensor Bank 2, Sensor 2
(3)	Catalytic Converter
(4)	Heated Oxygen Sensor Bank 1, Sensor 1
(5)	C105
(6)	Heated Oxygen Sensor Bank 2, Sensor 1

Figure 39:

P400


(1)	P400

Figure 40:

P/B Booster System Wiring


(1)	P103
(2)	C113
(3)	G112
(4)	G108

Figure 41:

Power Brake Fluid Flow Alarm And Module


(1)	R208
(2)	S211
(3)	S201
(4)	P/B Booster Fluid Flow Alarm
(5)	D202
(6)	C208
(7)	C201
(8)	Park Brake Warning Switch
(9)	P/B Booster Fluid Flow And Pressure Alarm Delay Module - Cutaway-School Bus
(10)	S253
(11)	S235
(12)	S234

Figure 42:

Radio Rear Speaker Wiring


(1)	Right Body Harness
(2)	C415
(3)	Left Body Harness
(4)	Radio Speaker, Right Overhead
(5)	Radio Speaker, Left Overhead
(6)	C403

Figure 43:

Rear Defogger Details-Stationary Window


(1)	RR Window/Grid
(2)	Door Lock Actuator Motor, Rear
(3)	Power Door Lock Switch Connector
(4)	P902 LH, P901 RH
(5)	C411 LH, C402 RH
(6)	C400
(7)	C901 LH, C902 RH
(8)	P905 LH, P906 RH
(9)	S903

Figure 44:

Rear Defogger Details-Swing Out Window


(1)	RR Window/Grid
(2)	RR Window Latch w/Flex Circuit
(3)	C901 LH, C902 RH
(4)	P905 LH, P906 RH

Figure 45:

Right Rear Door Wiring (LH Similar), Radio Speaker


(1)	C412
(2)	S903
(3)	License Lamp
(4)	Door Jamb Switch, Right Rear
(5)	Door lock Actuator Motor, Rear
(6)	Radio Speaker, Right Rear Door - Left Rear Door Opposite
(7)	P901 RH, P902 LH
(8)	C402
(9)	C400 RH

Figure 46:

Steering Column Wiring


(1)	Steering Column Harness
(2)	C200
(3)	Inflatable Restraint Steering Wheel Module Connector
(4)	Steering Column

Figure 47:

Sunshade Illuminated Mirror Wire


(1)	S204
(2)	S308
(3)	S203

Figure 48:

Tail lamp Assembly Wiring


(1)	P903 LH, P904 RH
(2)	C401 RH, C404 LH
(3)	S900 RH, S901 LH
(4)	S909 RH, S910 LH

Figure 49:

Trailer Wiring


(1)	P400
(2)	C406

Figure 50:

Video, RSA-T, and Entertainment Harness


(1)	Video Harness to Game Box
(2)	Entertainment Harness
(3)	Video Harness to Front Video Display
(4)	RSA-T Pigtail

Figure 51:

Wheel Speed Sensor Wiring


(1)	Wheel Speed Sensor, LF
(2)	Wheel Speed Sensor, RF
(3)	Connector C3
(4)	Electronic Brake Control Module (EBCM)