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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1769 (WIRING SYSTEMS AND POWER MANAGEMENT - INTRODUCTION)SCHEMATIC AND ROUTING DIAGRAMSHARNESS ROUTING VIEWS
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Harness Routing Views

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Harness Routing Views
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Forward Lamp Harness Routing (L61)
GM1777304Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Splice Pack SP101
2 Headlamp Assembly-Left
3 Forward Lamp Harness (L61)
4 Headlamp Assembly-Right
5 S111 (L61)
6 C106
7 G101
Fig 2: Forward Lamp Harness Routing (L66)
GM1777449Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Headlamp Assembly-Left
2 Forward Lamp Harness (L66)
3 Headlamp Assembly-Right
4 C106
5 G101
6 Splice Pack SP101
Fig 3: Forward Lamp Harness Routing (LAT)
GM1778648Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 C106
2 Fuse Block - Underhood
3 C122
4 Daytime Running Lamp (DRL) Resistor
5 Cooling Fan Resistor
6 Splice Pack SP101
7 G101
8 S111
9 Hood Ajar Switch Connector
Fig 4: Front of Engine Compartment (L61)
GM1760296Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Fuse Block - Underhood C2
2 C102 Engine Harness to Body Harness
3 Park Neutral Position (PNP) Switch
4 C100 Engine Harness to Transmission Harness
5 G105
6 C150 Engine to Fuel Injector Harness
7 G107
Fig 5: Front of Engine (Splices) (L61)
GM1760293Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 C100
2 Front Impact Bumper
3 S108
4 S109
5 S110
Fig 6: Engine Components - Top View
GM1760276Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Fuel Injector 6
2 Ignition Coil 6
3 Fuel Injector 5
4 Ignition Coil 5
5 Ignition Coil 4
6 Fuel Injector 4
7 Camshaft Position (CMP) Sensor
8 Knock Sensor (KS)
9 G109
10 Ignition Coil 1
11 Fuel Injector 1
12 Ignition Coil 2
13 Fuel Injector 2
14 Ignition Coil 3
15 Fuel Injector 3
Fig 7: Engine Components - Rear View
GM1760279Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Evaporative Emission (EVAP) Canister Purge Solenoid Valve
2 Splice Pack SP113
3 C102
4 Powertrain Control Module (PCM)
5 Rocker Arm Oil Control Solenoid Pigtail Connector
6 C103 (Crankshaft Position (CKP) Sensor Pigtail)
7 Rocker Arm Oil Control Solenoid
8 Engine Oil Pressure (EOP) Switch
9 Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2
10 Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
11 Splice Pack SP114
Fig 8: Front Engine Compartment (LAT)
GM1760263Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 S138
2 S139
3 S137
4 C110 Engine Harness to Forward Lamp Harness
5 C100 Engine Harness to Transmission
6 G105
Fig 9: Left Rear of Engine Compartment (LAT)
GM1760273Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 G107
2 Transmission Control Module (TCM) Connector
3 C123 Engine Harness to Body Harness
Fig 10: Left Rear of Engine Compartment (LAT)
GM1760272Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 C123 Engine Harness to Body Harness
2 Transmission Control Module (TCM)
3 Engine Control Module (ECM)
4 Auxiliary Fuse Block - Underhood
5 C110 Engine Harness to Forward Lamp Harness
6 Fuse Block - Underhood
7 Forward Lamp Harness
8 C121 Body Harness to Forward Lamp Harness
9 Body Harness
Fig 11: Engine Harness Splices (LAT)
GM1760255Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Fuse Block-Underhood
2 S137
3 S136
4 Transmission Control Module (TCM)
5 S139
6 S138
Fig 12: Engine Harness Splices (LAT)
GM1760250Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 S108
2 S103
Fig 13: Body Harness Routing-Front Engine Compartment (LAT)
GM1778656Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 C102 Body Harness to Engine Harness
2 C121 Body Harness to the Forward Lamp Harness
3 C104 Body Harness to Wheel Speed Sensor (WSS) Harness-LF
4 S140
5 Hill Hold Diode D2
6 S142
7 S141
8 Hill Hold Diode D1
9 S143
10 C105 Body Harness to Wheel Speed Sensor (WSS) Harness-RF
Fig 14: Body Harness Routing - Front Engine Compartment (L61)
GM1775989Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 C105
2 Rotor-RF
3 Battery
4 Fuse Block-Underhood
5 Forward Lamp Harness
6 C106
7 C102 (L61)
8 Body Harness
9 C104
10 Rotor-LF
Fig 15: Body Harness Routing - Front Engine Compartment (L66)
GM1776197Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Powertrain Control Module (PCM) Bracket
2 C105
3 C102 (L66)
4 Body Harness
5 Fuse Block-Underhood
6 C106
7 Body Harness
8 C108
Fig 16: Body Harness Routing - Passenger Compartment
GM1776896Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Instrument Panel (I/P) Trim
2 Body Harness
3 C306 (AG1/KA1)
4 C305 (AG1/KA1)
5 G301
6 Splice Pack SP301
7 S304
8 C204 (U2K)
9 S209
10 Front Windshield
Fig 17: Body Harness Routing - Lower Left Side of I/P
GM1776826Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Body Harness
2 G205/Splice Pack (SP205) (JM4)
3 C200
4 S501
5 S500
6 S204
Fig 18: Body Harness Routing - Lower Right Side of I/P
GM1776789Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 S600
2 S601
3 Door Latch-Front Passenger
4 C311
5 Body Harness
Fig 19: Body Harness Routing - Left Side of Passenger Compartment
GM1777178Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 C400
2 Tail Lamp - LR
3 C300
4 Splice Pack SP401
5 G401
6 Door Jamb Switch - LR
7 Left C Pillar
8 C309
9 Seat Belt Pretensioner - Left
10 Door Panel - LR
11 C700
12 Liftgate
Fig 20: Body Harness Routing - Rear Compartment Area
GM1777205Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Seat Belt Pretensioner - Right
2 C310
3 G403
4 Splice Pack SP403
5 C401
6 Tail Lamp - RR
7 Cellular/Navigational/Digital Antenna
8 Liftgate
9 C403
10 C402
11 C800
Fig 21: Body Harness Routing - Behind RR Wheel Well
GM1777213Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Fuel Tank Connector
2 Fuel Tank
3 C404
Fig 22: Electronic Power Steering (EPS)/Column Harness Routing
GM1781037Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Inflatable Restraint Steering Wheel Module Coil
2 C?? Inline to Coil ??
3 Inflatable Restraint Steering Wheel Module Coil C1/C2
4 Inflatable Restraint Steering Wheel Module Coil C5
5 Inflatable Restraint Steering Wheel Module Coil C3
6 Inflatable Restraint Steering Wheel Module Coil C4
7 Inflatable Restraint Steering Wheel Module Coil Harness
8 Power Steering Control Module (PSCM)
9 PSCM Motor
10 Electronic Power Steering (EPS) Harness
11 EPS Inline Fuse Holder
12 Fuse Block-Underhood B+ Post
Fig 23: I/P Harness Routing-Lower Left Side of I/P
GM1778958Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 C200
2 I/P Harness
3 Steering Column Bracket
4 C?? Cruise Control and Redundant Radio Controls
5 C203
Fig 24: I/P Harness Routing-Below Floor Shift Assembly
GM1779011Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Floor Shift Assembly
2 PRNDL Lamp
3 A/T Shift Lock Control Solenoid
4 Fuse Block-I/P
5 C304 (A/T)
6 Turn Signal Flasher Relay
Fig 25: I/P Harness Routing - Passenger Compartment
GM1778970Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Auxiliary Power Outlet 1
2 Floor Console
3 Inflatable Restraint Sensing and Diagnostic Module (SDM)
4 Auxiliary Power Outlet 2
5 Inflatable Restraint Side Impact Module - Right
6 Inflatable Restraint Vehicle Rollover Sensor (ASF)
7 C301 Instrument Panel (I/P) Harness to Auxiliary Power Outlet Harness
8 Inflatable Restraint Roof Rail Module Harness
9 C308 I/P Harness to Roof Rail Harness (ASF)
10 C307 I/P Harness to Roof Rail Harness (ASF)
11 I/P Harness
12 Inflatable Restraint Side Impact Module - Left
13 Inflatable Restraint Roof Rail Module Harness
Fig 26: I/P Harness Routing - Behind the Digital Radio Receiver (U2K)
GM1779096Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Body Control Module (BCM)
2 C204
3 Fuse Block - Instrument Panel (I/P) Connectors
Fig 27: I/P Harness Routing - Lower Right Side of I/P
GM1779778Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 HVAC Module
2 C202
3 C203
Fig 28: I/P Harness Routing - Behind Left Rear Wheel Well
GM1779780Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Liftgate
2 C412 Instrument Panel (I/P) Harness to Headliner Harness
3 I/P Harness
4 Wheel Well - LR
Fig 29: I/P Harness Splice Locations
GM1779806Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 S212
2 S306
3 S202
4 S203
5 S213
Fig 30: Headliner Harness Routing (CF5)
GM1779838Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Cellular/Navigational/Digital Antenna
2 Headliner Harness
3 Sunroof Motor (CF5)
4 Sunroof Control Module (CF5)
5 Sunroof Harness
6 C411 (CF5) Headliner Harness to Sunroof Harness
7 Instrument Panel (I/P) Harness
8 C410 I/P Harness to Headliner Harness
9 C412 I/P Harness to Headliner Harness
Fig 31: Door Harness Routing - Driver
GM1780666Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Door Lock Switch - Driver
2 Outside Rearview Mirror - Driver
3 Speaker - LF (Tweeter) (UW6/WBM)
4 Window Motor - LF
5 S500
6 S501
7 Body Harness
8 Speaker - LF
9 Door Latch - Driver
Fig 32: Door Harness Routing - Passenger
GM1780750Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Outside Rearview Mirror - Passenger
2 Door Lock Switch - Front Passenger
3 Door Latch - Front Passenger
4 Speaker - LF
5 Body Harness
6 Window Motor - Front Passenger
7 Speaker - LF (Tweeter) (UW6/WBM)
Fig 33: Door Harness Routing - LR
GM1780767Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Window Switch - LR
2 Window Motor - LR
3 Speaker - LR
4 Body Harness
5 C700
6 Door Latch - LR
Fig 34: Door Harness Routing - RR
GM1780825Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Window Switch - RR
2 Door Latch - RR
3 C800
4 Body Harness
5 Speaker - RR Connector
6 Window Motor - RR
Fig 35: Liftgate Harness Routing
GM1780607Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Center High Mounted Stop Lamp (CHMSL)
2 C403
3 S402
4 C402
5 S400
6 S407
7 Rear Defogger Grid Connector
8 C405
9 Liftgate Lamp - Left
10 License Lamps
11 Liftgate Latch
12 Liftgate Lamp - Right
13 Rear Defogger Grid Connector
Fig 36: Floor Console Harness Routing
GM1781030Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Auxiliary Power Outlet 1
2 Auxiliary Power Outlet 2
3 C301
RENDER: 1.0x

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