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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1316 (WIRING SYSTEMS)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 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: LNK Engine Compartment Connector Locations
GM874114Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Engine Harness
2 Engine Compartment Harness
3 Camshaft Position Sensor
4 Engine Coolant Temperature Sensor
5 Camshaft Timing Oil Control Valve (VVTL)
6 Cruise Control Actuator
7 Brake Fluid Level Warning Switch
8 Front Wiper Motor
9 LH Front ABS Speed Sensor
10 Back-up Light Switch
11 LH Front Parking/Turn Signal Light
12 LH Headlight (Low)
13 LH Headlight (High)
14 LH Front Fog Light
15 LH Front Airbag Sensor
16 Transmission Solenoid
17 Horn
18 Ambient Temperature Sensor
19 Crankshaft Position Sensor
20 A/C Clutch
21 RH Front Airbag Sensor
22 RH Front Fog Light
23 RH Headlight (High)
24 Front Washer Motor
25 RH Headlight (Low)
26 RH Front Parking/Turn Signal Light
27 Generator
28 Generator
29 RH Front ABS Speed Sensor
30 Camshaft Timing Oil Control Valve (VVT)
Fig 2: LNK Engine Compartment Connector Locations
GM874117Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Fuel Injector No. 1
2 Ignition Coil No. 1
3 Fuel Injector No. 2
4 Ignition Coil No. 2
5 Engine Compartment Harness
6 Engine Harness
7 Ignition Coil No. 3
8 Fuel Injector No. 3
9 Ignition Coil No. 4
10 Fuel Injector No. 4
11 Oil Pressure Switch (VVTL)
12 Evap VSV
13 Canister Closed Valve VSV
14 Mass Air Flow Sensor
15 Junction Connector
16 ACIS VSV
17 Throttle Position Sensor
18 O/D Direct Clutch Speed Sensor
19 Ignition Noise Filter
20 Vehicle Speed Sensor
21 Engine Cooling Fan Resistor
22 Park/Neutral Position Switch
23 Engine Cooling Fan Motor
24 Idle Air Control Valve
25 Starter
26 Starter
27 Oil Pressure Switch
28 Washer Fluid Level Sensor
29 Rear Washer Motor
30 Pressure Switch
31 Electronic Brake Control Module
32 Knock Sensor
33 Power Steering Oil Pressure Switch
Fig 3: LNK Engine Compartment Ground and Inline Connector Locations
GM874129Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Engine Compartment Harness
2 G104
3 G105
4 G103
5 C100
6 Engine Harness
7 G102
Fig 4: LNK Engine Compartment Splice Locations
GM874131Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Engine Compartment Harness
2 S105
3 S103
4 S106
5 Engine Harness
6 S101
Fig 5: LV6 Engine Compartment Connector Locations - 1 of 2
GM874118Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Engine Harness
2 Engine Compartment Harness
3 Camshaft Position Sensor
4 Heated Oxygen Sensor 1
5 Engine Coolant Temperature Sensor
6 Cruise Control Actuator
7 Brake Fluid Level Warning Switch
8 Front Wiper Motor
9 LH Front ABS Speed Sensor
10 Back-up Light Switch
11 LH Front Parking/Turn Signal Light
12 LH Headlight (Low)
13 LH Headlight (High)
14 Radiator Fan Resistor
15 LH Front Airbag Sensor
16 Transmission Solenoid
17 Horn
18 Ambient Temperature Sensor
19 A/C Clutch
20 RH Front Airbag Sensor
21 RH Front Fog Light
22 RH Headlight (High)
23 Front Washer Motor
24 RH Headlight (Low)
25 RH Front Parking/Turn Signal Light
26 Generator
27 RH Front ABS Speed Sensor
28 Generator
29 Crankshaft Position Sensor
30 Camshaft Timing Oil Control Valve (VVT)
Fig 6: LV6 Engine Compartment Connector Locations - 2 of 2
GM874119Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Power Steering Oil Pressure Switch
2 Ignition Coil No. 1
3 Fuel Injector No. 2
4 Ignition Coil No. 2
5 Engine Harness
6 Engine Compartment Harness
7 Ignition Coil No. 3
8 Fuel Injector No. 3
9 Ignition Coil No. 4
10 Fuel Injector No. 4
11 Vehicle Speed Sensor (Instrument Cluster)
12 Ignition Noise Filter
13 EVAP VSV
14 Canister Closed VSV
15 Mass Air Flow Sensor
16 Junction Connector
17 Vehicle Speed Sensor (Transmission)
18 Throttle Position Sensor
19 Engine Cooling Fan Resistor
20 Park/Neutral Position Switch (AWD)
21 Engine Cooling Fan Motor
22 Park/Neutral Position Switch (2WD)
23 Idle Air Control Valve
24 Starter
25 Starter
26 Oil Pressure Switch
27 Knock Sensor
28 Rear Washer Motor
29 Washer Fluid Level Sensor
30 Pressure Switch
31 Electronic Brake Control Module
32 Fuel Injector No. 1
Fig 7: LV6 Engine Compartment Ground and Inline Connector Locations
GM874134Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Engine Compartment Harness
2 G104
3 G105
4 G103
5 C100
6 Engine Harness
7 G102
Fig 8: LV6 Engine Compartment Splice Locations
GM874134Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Engine Compartment Harness
2 Engine Harness
3 S106
4 S103
5 S105
6 S101
7 G102
Fig 9: Instrument Panel Inline Connector Locations
GM874139Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 C202
2 C226
3 Instrument Panel Harness No. 4
4 Engine Compartment Harness
5 Instrument Panel Harness
6 A/C Harness
7 Engine Harness
8 RH Front Door Harness
9 Console Harness
10 Instrument Panel Harness No. 3
11 C214
12 Floor Harness
13 C222
14 C206
15 C216
16 C215
17 LH Front Door Harness
18 Door Harness
19 C204
20 C203
21 C201
22 Roof Harness
22 Roof Harness
Fig 10: Instrument Panel Ground Locations
GM874143Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 G201
2 G202
3 G200
Fig 11: Instrument Panel Inline Connector Locations
GM874183Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 C211
2 Engine Compartment Harness
3 Instrument Panel Harness
4 A/C Harness
5 C207
6 Engine Harness
7 C208
8 C209
9 C210
10 RH Front Door Harness
11 C218
12 C227
13 C217
14 Console Harness
15 C221
16 Instrument Panel Harness No. 3
17 C221
18 Floor Harness
19 LH Front Door Harness
20 Instrument Panel Harness No. 4
21 Roof Harness
Fig 12: Instrument Panel Splice Locations
GM875677Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 S111
2 S214
3 S223
4 S110
5 S123
6 S111
7 S100
8 S104
9 S202
10 S120
11 S210
12 S217
13 S211
14 S121
Fig 13: Body Connector and Ground Locations
GM874185Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Roof Harness
2 Instrument Panel Harness No. 3
3 RH Front Door Harness
4 C302
5 RH Rear Door Harness
6 Liftgate Harness No. 1
7 C300
8 C301
9 C205
10 G301
11 Liftgate Harness No. 2
12 C401
13 C400
14 RH ABS Sensor Harness
15 G300
16 LH ABS Sensor Harness
17 C205
18 LH Rear Door Harness
19 Instrument Panel Harness
20 Floor Harness
21 C303
22 LH Front Door Harness
23 Instrument Panel Harness
Fig 14: Body Harness Splice Locations
GM874188Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 S301
2 S300
3 S302
4 S600
5 S401
6 S400
7 S302
8 S223
9 S500
10 S500
Fig 15: Body Connector Locations-1 of 2
GM874126Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 LH Speaker
2 Floor Harness
3 RH Side Airbag Module
4 Roof Harness
5 RH Front Power Window Motor
6 Sunroof Motor and Limit Switch
7 Sunroof Control Relay
8 RH Power Mirror
9 RH Speaker
10 RH Front Power Window Switch
11 RH Side Airbag Sensor
12 Luggage Compartment Light
13 RH Rear Power Window Switch
14 RH Rear Power Window Motor
15 Right Rear Door Harness
16 RH Rear Door Speaker
17 Tailgate Harness
18 RH Pretensioner
19 RH Rear Combination Light
20 RH License Plate Light
21 LH License Plate Light
22 Rear Wiper Relay
23 Vacuum Switching Valve (VSV) (AWD)
24 LH Rear Combination Light
25 Noise Filter
26 Vapor Pressure Sensor (2WD)
27 Floor Harness
28 Vacuum Switching Valve (VSV) (2WD)
29 Vapor Pressure Sensor (AWD)
30 LH Rear Power Window Motor
31 LH Rear Door Speaker
32 LH Pretensioner
33 LH Side Airbag Sensor
34 LH Side Airbag Module
35 LH Rear Power Window Switch
36 Drivers Door Harness
37 LH Front Power Window Motor
38 LH Power Mirror
Fig 16: Body Connector Locations-2 of 2
GM874124Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Floor Harness
2 Vanity Mirror Light
3 Roof Harness
4 RH Front Door Speaker
5 RH Seat Belt Buckle Switch
6 Interior Light
7 RH Front Door Lock Control Switch
8 RH Front Door Key Switch and Door Lock Motor
9 RH Front Door Courtesy Switch
10 Right Rear Door Harness
11 RH Rear Door Lock Motor
12 Center High Mount Stop Lamp
13 Door Control Module
14 Floor Harness
15 RH Rear Door Courtesy Switch
16 Liftgate Courtesy Switch and Opener Motor
17 Junction Switch
18 Door Courtesy Diode
19 Liftgate Courtesy Switch and Door Lock Motor
20 Tailgate Harness
21 Junction Connector
22 RH Rear ABS Speed Sensor
23 Junction Conector
24 Junction Conector
25 Junction Conector
26 Fuel Pump and Sender (2WD)
27 Floor Harness
28 LH Rear ABS Speed Sensor
29 Fuel Pump and Sender (4WD)
30 LH Rear Door Courtesy Switch
31 LH Rear Door Lock Motor
32 LH Seat Buckle Switch and Seat Position Sensor
33 Left Rear Door
34 Drivers Courtesy Switch
35 Door Harness
36 Drivers Door Lock Switch
37 Left Front Door Speaker
38 Master Door Lock Switch
39 Master Door Lock Switch
33 -
34 LH Front Door Courtesy Switch
35 -
36 LH Front Door Key Switch and and Lock Motor
37 LH Front Door Speaker
38 LH Front Door Lock Control Switch and Power Window Switch
39 LH Front Door Lock Control Switch
Fig 17: Instrument Panel Connector Locations - 1 of 2
GM874123Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Accessory Power Receptical Switch
2 Hazard Switch
3 Rear Defogger Switch
4 Front Passenger Seat Belt Warning Light
5 Radio
6 Radio
7 Instrument Panel Harness
8 Accessory Power Receptical (115V)
9 Glass Breakage Sensor
10 Starter Cut Relay
11 SP107 C1
12 SP107 C2
13 TVIP ECU
14 Junction Connector
15 Junction Connector
16 Heated Oxygen Sensor 2 (LV6 w/AWD)
17 Rear Power Outlet
18 Junction Connector
19 Parking Brake Switch
20 Heated Oxygen Sensor 2 (LNK)
21 Shift Lock Control Module
22 Voltage Inverter
23 Heated Oxygen Sensor 1 (LNK)
24 Heated Oxygen Sensor (LV6 2WD)
25 Ignition Switch
26 Unlock Warning Switch
27 I/P Harness
28 Stop Light Switch
29 Integration Relay
30 Security Indicator
31 Turn Signal Flasher Relay
32 Liftgate Opener Switch
33 Dimmer Switch
34 Rear Wiper Relay 1
35 Power Mirror Switch
36 Junction Connector
Fig 18: Instrument Panel Connector Locations - 2 of 2
GM874122Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Automatic Light Control Sensor
2 Cruise Control Electronic Control Module
3 Daytime Running Light Relay
4 Instrument Cluster
5 Multifunction Switch
6 Multifunction Switch
7 A/C Control Switch
8 Antenna Amplifier
9 Blower Switch
10 Instrument Panel Harness
11 Air Inlet Control Servo Motor
12 I/P Airbag Module
13 Blower Resistor
14 Defroster Mode Switch
15 Blower Motor
16 Powertrain Control Module 1
17 Powertrain Control Module 2
18 Powertrain Control Module 3
19 Powertrain Control Module 4
20 CD Changer
21 CD Changer
22 Cigar Lighter Illumination
23 O/D Switch
24 ABS Deceleration Sensor
25 Power Outlet
26 Sensing and Diagnostic Module 1
27 Sensing and Diagnostic Module 2
28 Sensing and Diagnostic Module 3
29 Steering Wheel Airbag Module
30 Multifunction Switch
31 Harness
32 Data Link Connector
33 Cruise Control Clutch Switch
34 Rear Wiper Relay 1 Diode
35 Clutch Start Switch
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