SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 521 (WIRING SYSTEMS AND POWER MANAGEMENT - INTRODUCTION)SCHEMATIC AND ROUTING DIAGRAMSHARNESS ROUTING VIEWS
2008 Chevrolet Chevy Express G3500, Van Passenger Extended

Harness Routing Views

2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Harness Routing Views
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 GMC Savana Special, 2009 GMC Savana Camper Special, 2009 GMC Savana, 2009 Chevrolet RV Cutaway, and 2009 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Forward Lamp Harness
GM1965748Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 G100
2 J110
3 X150 (UFA)
4 J121
5 J118
6 G101
7 J122
Fig 2: Instrument Panel Harness - Front Engine Compartment
GM1965751Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X141 (UJ1)
2 X150 (UFA)
3 X100
4 X104
Fig 3: Engine - Left Rear (LU3)
GM1965622Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 J101
2 J102
3 G102
4 G103
Fig 4: Engine - Front (LU3)
GM1965639Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X109
2 J115
3 J120
4 J123
5 X100
6 X101
7 X176
Fig 5: Engine - Front (LMF)
GM1965668Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X109
2 J115
3 J123
4 X101
5 X100
6 X127
7 X177
Fig 6: Engine - Left Rear (LMF)
GM1965661Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X126
2 J102
3 J101
4 G102
5 G103
Fig 7: Engine - Front (LY6/LY2)
GM1965659Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X109
2 J115
3 J123
4 X101
5 X100
6 X126
7 X128 (Cutaway)
8 X177
Fig 8: Engine - Left Rear (LY6/LY2)
GM1965652Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X126
2 J101
3 J102
4 G103
5 G102
Fig 9: Engine Harness - Front View (LMM)
GM1966505Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X108
2 X142
3 X109
4 X101
5 X100
6 G102
7 G103
8 X105
9 X115
Fig 10: Engine - Part of Assembly (POA) Harness (LMM)
GM1966612Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X110
2 X111
3 X112
4 G108
5 G104
6 G107
Fig 11: Engine Harness Splices (LMM)
GM1966528Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 J115
2 J104
3 J123
4 J102
5 J101
Fig 12: Transmission Inline
GM1965743Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X175 (4L80-E)
2 X175 (4L60-E)
Fig 13: Instrument Panel Harness - Passenger Compartment
GM1965760Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 JX250
2 X221
3 X276
4 G304
5 X331
6 X330
7 X200
8 X318 (Passenger/Cargo)
9 G301/G302
10 X222 (YF2/YF7)
11 X220
12 JX200
Fig 14: Instrument Panel Harness Splices
GM1965782Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 J247
2 J244
3 J231
4 J248
5 J207
6 J246 (DE7)
7 J245 (DE7)
8 J249
9 J250
Fig 15: Identifying Steering Column
GM1965807Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X200
2 Steering Wheel Speed/Position Sensor (JL4)
Fig 16: Body Harness - Left Front Passenger Compartment
GM1965813Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 JX347
2 G347
3 X500
4 X319 (C36/ENC)
5 X318 (Passenger/Cargo)
6 G301/G302
7 X307
8 X330
9 X331
Fig 17: Locating Body Harness Connector X205
GM1965837Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X600
2 X205
3 X306
4 X324 (ASF)
5 G348
6 JX348
Fig 18: Body Harness - Right D-Pillar
GM1965826Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 C-Pillar - Right Side
2 X324 (ASF)
Fig 19: Driver/Front Passenger Seats
GM1965909Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X306
2 X307
Fig 20: Body Harness - Left Rear Cargo Area
GM1965819Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 G402
2 X401
3 X411
4 X321 (YF2/YF7)
5 X320 (YF2/YF7)
6 X407 (C36/C69)
7 X409 (C36/C69)
Fig 21: Body Harness - Right Rear Cargo Area
GM1965831Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X419
2 X415
3 X420
4 G401
5 X402
6 X412
7 X400
8 X324
Fig 22: Body Harness Splices
GM1965878Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 J308 (C69 without YF7)
2 J310 (C69 without YF7)
3 J311 (C69 without YF7)
4 J403
5 J451
6 J450
7 J453
8 J452
9 J410
10 J401 (C36/C49)
11 J356 (C69/AU3)
12 J318 (ASF)
13 J331
Fig 23: Front/Rear Headliner Harness
GM2044601Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X417 (Cargo without YF7)
2 X205
3 X420 (Passenger)
Fig 24: Driver and Passenger Doors
GM1966198Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 J501 (AU3)
2 J502 (DE5/DE7)
3 J500 (A31/DE5/DE7)
4 Driver Door
5 X500
6 X501 (ASF)
7 X600
8 Passenger Door
9 X601 (ASF)
10 J600 (A31/DE5/DE7)
Fig 25: Rear Cargo Doors
GM1966209Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 J902
2 X400
3 X412
4 Cargo Door - Right Rear
5 X902 (C49 with A12)
6 Cargo Door - Left Rear
7 X901 (C49 with A12)
8 X411
Fig 26: Chassis Harness (LMM)
GM1965974Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 J402
2 G400 (Passenger/Cargo)
3 X405 (Cutaway)
4 G400 (Cutaway)
5 J301
6 J315 (5.3L)
7 G300
8 J315 (4.3L/4.8L/6.0L)
9 X101
Fig 27: Chassis Harness (LMM)
GM1966192Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X101
2 X105
3 X405 (Cutaway)
4 G400 (Cutaway)
5 J402
6 X305 (K08)
7 J119
8 X174
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.