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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1621 (WIRING SYSTEMS AND POWER MANAGEMENT - INTRODUCTION)SCHEMATIC AND ROUTING DIAGRAMSHARNESS ROUTING VIEWS
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Harness Routing Views

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Harness Routing Views
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Forward Lamp Harness Routing (Gas except LY6) - 1 of 2
GM2159782Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X100
2 X103
3 X120 (HP2)
4 X106
Fig 2: Forward Lamp Harness Routing (Gas except LY6) - 2 of 2
GM2159641Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 J117 (HP2)
2 J101
3 J118 (HP2)
4 J119 (HP2)
5 J100
6 J115 (HP2)
7 J114 (HP2)
Fig 3: Forward Lamp Harness Routing (Diesel/LY6)
GM1922972Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 J101
2 X106
3 X103
4 J100
5 X100
6 G100
7 G101
Fig 4: Engine Harness Routing - Left Side (4.3L)
GM1846447Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Throttle Body
2 G107
3 Transmission
4 X300
5 X109
6 X110 (NQG/NQH)
7 Fuse Block - Underhood X2
Fig 5: Engine Harness Routing - Top (4.3L)
GM1846445Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Mega Fuse Ring Terminal
2 X175 (M30)
3 J128
4 J105
5 J106
6 J130 (M30 with NQG/NQH)
7 Engine Control Module (ECM) X1
8 Engine Control Module (ECM) X2
9 G103
10 X112
11 Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor Connector
Fig 6: Camshaft Position Sensor Jumper Harness Routing (4.8L/5.3L/6.0L/6.2L)
GM1922077Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X112
2 Camshaft Position Sensor Jumper Harness
Fig 7: Engine Harness Routing - Left Front Side (4.8L/5.3L/6.0L/6.2L)
GM1846441Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Air Intake Duct
2 X111
3 Fuse Block - Underhood X2
4 X109
5 X110 (NQF/NQG/NQH)
6 Engine Control Module (ECM) X2
7 Engine Control Module (ECM) X1
8 G102
9 J105
Fig 8: Engine harness Routing - Right Front Side (4.8L/5.3L/6.0L/6.2L)
GM1846440Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Dash Panel
2 X113
3 J106
4 G103
Fig 9: Engine Harness Routing - Rear (4.8L/5.3L/6.0L/6.2L)
GM1846443Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Dash Panel
2 Transmission
3 X175 (M30)
4 Transfer Case Shift Control Switch (NQG)
Fig 10: Heated Oxygen Sensor (HO2S) Jumper Harness Routing (31 Series +6.0L)
GM1934388Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X125
2 Heated Oxygen Sensor (H02S) Bank 2 Sensor 2
Fig 11: Engine Harness Routing - Front (LFA/HP2) - 1 of 2
GM2160366Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X111
2 X109
3 X110 (NQH)
4 X120
5 X150
6 X112
Fig 12: Engine Harness Routing - Front (LFA/HP2) - 2 of 2
GM2163311Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 J105
2 J121
3 J120
4 J123
5 J130 (NQH)
6 J124
7 J106
8 J104
9 J122
Fig 13: Engine Harness Routing - Rear (LFA/HP2)
GM2160370Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X113
2 X176
3 Automatic Transmission Connector
4 X300
Fig 14: Engine Harness Jumper to Engine POA Harness (Diesel)
GM1870628Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Battery - Right
2 Fuse Holder
3 X127
4 X108
5 X107
6 X123 (PTO)
7 Fuse Block - Underhood
8 X109
9 Battery - Left
10 Engine Control Module (ECM)
11 Transmission Control Module (TCM)
Fig 15: Engine Chassis Harness Routing - Top Rear (Diesel)
GM1870623Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 J104
2 J105
3 J106
4 J132 (K76/YF2)
5 J133 (PTO)
6 X110 (NQF/NQG)
Fig 16: Engine Chassis Harness Routing - Rear (Diesel)
GM2056669Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X300
2 G300
3 Automatic Transmission Turbine Speed Sensor (MW7)
4 Automatic Transmission (MW7)
5 Vehicle Speed Sensor (VSS) (MW7)
6 X124 (PTO)
7 Power Take Off (PTO) Module (PTO)
8 X175 (MW7)
Fig 17: Rear of the Engine Compartment Components (TP2)
GM1934393Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Fuse Holder
2 Auxiliary Battery Run Relay
3 Auxiliary Battery Harness
4 Auxilary Battery Relay
5 X122
Fig 18: I/P Harness Routing - Engine Compartment
GM1846432Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 G110 (XA7)
2 J113 (NQH)
3 Fuse Block - Underhood X5
4 Fuse Block - Underhood X4
5 Left Front Fender
6 X103
7 X109
8 X115
Fig 19: I/P Harness Routing - Engine Compartment (HP2)
GM2171756Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X115
2 X129
3 J113 (NQH)
4 X109
5 X103
6 X150
Fig 20: I/P Harness Routing - Passenger Compartment (HP2) - 1 of 2
GM2171977Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X201
2 X205
3 X200
4 X215
5 X212
6 X202
Fig 21: I/P Harness Routing - Passenger Compartment (HP2) - 2 of 2
GM2172590Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 J201
2 J206
3 J203
4 J225
5 J240
6 J226
7 J231
8 J200
9 J222
10 J241
11 JX221
12 J207
Fig 22: I/P Harness Routing - Passenger Compartment (Except HP2) - 1 of 2
GM2172747Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X201
2 X205
3 Junction Block - Right I/P
4 X200
5 X202
Fig 23: I/P Harness Routing - Passenger Compartment (Except HP2) - 2 of 2
GM2172751Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 J207 (NQF/NQH except MEX)
2 J201
3 JX221
4 J200
5 J203 (Y91)
6 J206 (CJ2)
Fig 24: I/P Extension Harness Routing (-Y91)
GM1846434Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 JX223 (U2K/UK6/UE1)
2 X203 (UE1/U3U/UVB)
3 X204 (U42)
4 X212
5 X206 (U42)
6 X213 (COAX)
7 Vehicle Communication Interface Module (VCIM) (UE1)
8 X301 (UQA/D07)
9 Floor Panel
Fig 25: I/P Extension Harness Routing (except SLT/Y91/MEX)
GM2168760Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X203 (UE1/U3U/UVB)
2 X204 (U42)
3 X206 (U42)
4 X213 (COAX)
5 X212
6 X301 (UQA/D07)
Fig 26: Fuse Block Jumper Harness Routing (9L4)
GM1890152Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Fuse Block - Mobile Radio
2 I/P Structure - Right Side
3 J224
4 J219
5 J209
6 X219
7 X214
8 J210
9 J211
10 Blunt Cut - Mobile Radio Provision
11 X226
12 Instrument Panel
Fig 27: Brake Clutch Harness Routing
GM1846991Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Driver Door Frame
2 X205
3 X102 (JL1)
4 Accelerator Pedal Position (APP) Sensor Connector
5 Junction Block - Left I/P (except MEX)
Fig 28: Steering Column Harness Routing
GM1933010Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X201
2 X276 (KA9)
3 Heated Steering Fuse (KA9)
4 X277 (KA9)
5 X275
Fig 29: Overhead Console Harness Routing
GM1890108Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X304 (except MEX)
2 Inflatable Restraint Passenger Air Bag On/Off Indicator (AL0/C99 except MEX)
3 Cellular Telephone Microphone (UE1/U3U/UVB)
4 Roof Beacon Switch (5X7/5Y0/TRW)
5 Sliding Rear Window Switch (A48)
6 Dome/Reading Lamps - Front
7 J322 (TRW/UG1/A48)
8 J323
9 X313 (CF5/TRW/5X7/5Y0)
10 Blunt Cut - Roof Mounted Beacon Provision (TRW)
11 Roof Beacon Relay (TRW)
Fig 30: Headliner Harness Routing (Regular Cab)
GM1846992Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X304 (except MEX)
2 X318
3 J327 (except MEX)
4 J328
5 X203 (UE1/U3U/UVB))
Fig 31: Headliner Harness Routing (Extended Cab)
GM1846993Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X304
2 X318
3 J327
4 J328
5 X203 (UE1/U3U/UVB)
Fig 32: Headliner Harness Routing (Crew Cab)
GM1846994Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X304
2 X318
3 J327
4 J328
5 X208 (A48)
6 X203 (UE1/U3U/UVB)
7 X204 (U42)
8 I/P Trim
Fig 33: Body Harness Routing (Regular Cab)
GM1846438Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X200
2 G302
3 X319 (AZ3/D07 with UQ3)
4 JX339 (except MEX)
5 X305 (except MEX)
6 G304 (except MEX)
7 J304 (AG2)
8 J303
9 X303 (except MEX)
10 Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector
11 X275
12 X202
13 X500 (YE9 without AN3/DL3)
14 X501 (YE9 without AN3/DL3)
15 X601 (ASF)
16 X600 (YE9 without AN3/DL3)
Fig 34: Body Harness Routing (Extended Cab)
GM1846437Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X700
2 G303
3 X303
4 Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector
5 X501 (YE9 without AN3/DL3)
6 X275
7 X208 (A48)
8 X202
9 X500 (YE9 without AN3/DL3)
10 G301
11 J304
12 X200
13 X601 (ASF)
14 X600 (YE9 without AN3/DL3)
15 G302
16 JX339
17 X305
18 X319 (AZ3/D07 with UQ3)
19 X800
20 J302
21 G304
22 X320 (A48)
23 J303
24 X322 (UD7)
25 Floor Panel
Fig 35: Body Harness Routing (Crew Cab except HP2)
GM2152886Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X601 (ASF)
2 X309 (Y91)
3 G302
4 J302
5 JX339
6 G301
7 J304
8 X305
9 X800
10 G304
11 G307
12 X320 (A48)
13 J303
14 G303
15 X700
16 X303
17 Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector
18 X501 (YE9 without AN3/DL3)
19 X502 (ASF without YE9 or with AN3)
20 X202
21 X500 (YE9 without AN3/DL3)
22 X208 (A48)
23 X600 (YE9 without AN3/DL3)
Fig 36: Body Harness Routing (Crew Cab with HP2) - 1 of 2
GM2163615Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X501 (Except DL3)
2 X275
3 X200
4 X215
5 X319
6 X305
7 X800
8 X322 (UD7)
9 X320 (A48)
10 X350
11 X303
12 X700
13 X601 (ASF)
14 X600 (Except DL3)
15 X500 (Except DL3) or X502 (DL3)
16 X202
17 X208 (A48)
Fig 37: Body Harness Routing (Crew Cab with HP2) - 2 of 2
GM2163892Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 J303
2 J302
3 J304
4 JX339
Fig 38: Chassis Harness Routing (Crew Cab)
GM1846424Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X300
2 X408 (UD7)
3 G401
4 J423 (except LU3)
5 J331
6 Fuse Block - Underhood X3
7 X115
8 X102 (JL1)
9 J338 (except LU3/LMG)
10 J300
11 G300
Fig 39: Chassis Harness Routing (HP2) - 1 of 2
GM2164185Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X102 (JL1)
2 X300
3 X408 (UD7)
4 X129
5 X115
Fig 40: Chassis Harness Routing (HP2) - 2 of 2
GM2164195Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 J331
2 J411 (JL1)
3 J423
4 J422
5 J338
6 J301
7 J321
8 J325
9 J300
Fig 41: Chassis Harness Routing (Regular Cab/Extended Cab)
GM1846422Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X300
2 X408 (UD7)
3 Trailer Connector (UY7)
4 J411 (JL1)
5 G401
6 J331
7 Fuse Block - Underhood X3
8 X115
9 X102 (JL1)
10 J300
11 G300
Fig 42: Chassis Harness - Front Engine Compartment (31 Series)
GM2085721Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X102 (JL1)
2 Fuel Pump Relay - Secondary (LY6 without NQZ)
3 Fuse Block - Underhood
4 X126
Fig 43: Chassis Harness (31 Series)
GM2085746Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Trailer Brake Control Relay (JL1)
2 J422 (JL1)
3 Trailer Connector
4 J331 (Diesel without NQZ/LY6)
5 X300 (LY6)
6 X300 (Diesel)
7 J411 (JL1)
8 Junction Block - Rear Lamps
9 G401
10 J338 (JL1)
11 G300
12 J300 (LY6 without NQZ)
Fig 44: Camper Harness Routing & Chassis Harness Routing - Rear
GM1890102Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X414 (UY2/8S3)
2 J420 (UY2)
3 Camper/Trailer Harness
4 J415 (UY2)
5 Chassis Harness
6 J416 (UY2)
7 J417 (UY2)
8 J414 (UY2)
9 J421 (UY2)
10 J410 (UY2)
11 Blunt Cut - Camper Trailer Provision (UY2)
12 G401 (except LY6/LMM)
13 Trailer Connector (UY7)
Fig 45: Driver Door Harness Routing
GM1846999Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Door Frame
2 Fuse Block - I/P X4
3 J502 (YE9 without AN3)
4 X500 (YE9 without AN3/DL3)
5 X502 (ASF without YE9 or with AN3)
Fig 46: Passenger Door Harness Routing
GM1847000Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 J604 (YE9 without AN3/DL3)
2 Junction Block - Right I/P X3
3 Door Frame
4 X601 (ASF)
5 X600 (YE9 without AN3/DL3)
6 J603 (YE9 without AN3/DL3)
Fig 47: Left Rear Door Harness Routing (Extended Cab)
GM1846996Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X700
2 Door Frame
Fig 48: Left Rear Door Harness Routing (Crew Cab)
GM1846998Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Door Frame
2 X700
Fig 49: Right Rear Door Harness Routing (Extended Cab)
GM1846995Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Door Frame
2 X800
Fig 50: Right Rear Door Harness Routing (Crew Cab)
GM1846997Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X800
2 Door Handle
3 Door Frame
Fig 51: Driver Seat Harness Routing
GM1913810Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Seat Recline Motor - Driver (AN3)
2 Seat Lumbar Vertical Motor Position Sensor - Driver (AN3)
3 Seat Lumbar Vertical Motor - Driver (AN3)
4 X324 (AN3)
5 Seat Lumbar Horizontal Motor - Driver (AN3)
6 Seat Lumbar Horizontal Motor Position Sensor - Driver (AN3)
7 Seat Recline Position Sensor - Driver (AN3)
8 Seat Lumbar Switch - Driver (AN3)
9 Seat Adjuster Switch - Driver (AG1)
10 Memory Seat Module (MSM) (AN3)
11 Inflatable Restraint Seat Position Sensor (SPS) - Driver (10 Series)
12 Seat Adjuster Motor Assembly - Driver (AG1)
13 Seat Belt Buckle - Driver
Fig 52: Console Harness Routing (Y91/D07/UQA)
GM1846450Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X319 (D07with UQ3)
2 X301
3 Console Bracket
Fig 53: Passenger Seat Harness Routing
GM1913813Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Seat Frame
2 X325 (AN3)
3 Seat Lumbar Vertical Motor - Passenger (AN3)
4 Seat Adjuster Switch - Passenger (AG2)
5 Seat Lumbar Switch - Passenger (AN3)
6 Seat Belt Buckle - Passenger
7 Inflatable Restraint Passenger Presence System (PPS) Module (AL0)
8 Seat Adjuster Motor Assembly - Passenger (AG2)
9 Inflatable Restraint Passenger Presence System (PPS) Sensor (AL0)
10 Seat Recline Motor - Passenger (AN3)
11 Seat Lumbar Horizontal Motor - Passenger (AN3)
Fig 54: Sliding Rear Window Jumper Harness Routing (A48)
GM1847001Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X320
2 Rear Window
3 J336 (except C49)
4 J335 (except C49)
Fig 55: Left & Right Hip Lamp Harness Routing (R05)
GM1922961Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 X415
2 J412
3 J419
4 Right Hip Lamp Harness
5 Left Hip Lamp Harness
6 J418
7 J413
8 X416
Fig 56: Rear Bumper Harness Routing
GM1846452Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Rear Bumper
2 J403 (UD7)
3 J404 (UD7)
4 Junction Block - Rear Lamps Connector
5 X408 (UD7)
RENDER: 1.0x

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