Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1606 (LIGHTING SYSTEMS)COMPONENT LOCATORLIGHTING SYSTEMS COMPONENT VIEWS
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Lighting Systems Component Views
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Lighting Systems Component Views
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
| Callout | Component Name |
|---|---|
| 1 | Headlamp-Left |
| 2 | Headlamp Connector |
| 3 | Marker Lamp |
| 4 | Park/Turn Signal Lamp |
| Callout | Component Name |
|---|---|
| 1 | Fog Lamp |
| 2 | Cornering Lamp |
| Callout | Component Name |
|---|---|
| 1 | Forward Lamp Harness |
| 2 | Fog Lamp |
| Callout | Component Name |
|---|---|
| 1 | Headlamp-Left |
| 2 | Headlamp Connector |
| 3 | Fog Lamp Connector |
| 4 | Park/Turn Signal Lamp |
| 5 | Marker Lamp |
| Callout | Component Name |
|---|---|
| 1 | Headlamp Connector |
| 2 | Fog Lamp |
| 3 | Cornering Lamp |
| 4 | Marker Lamp |
| 5 | Forward Lamp Harness |
| 6 | Park/Turn Lamp |
| Callout | Component Name |
|---|---|
| 1 | Underhood Lamp |
| Callout | Component Name |
|---|---|
| 1 | Backup Switch |
| Callout | Component Name |
|---|---|
| 1 | Courtesy Lamp |
| 2 | Headlamp Switch Connectors |
| Callout | Component Name |
|---|---|
| 1 | Stop Lamp Switch |
| Callout | Component Name |
|---|---|
| 1 | Multi-function Switch |
| 2 | C201 |
| Callout | Component Name |
|---|---|
| 1 | Hazard Switch |
| 2 | Steering Column |
| Callout | Component Name |
|---|---|
| 1 | Vanity Mirror Lamps, LF |
| Callout | Component Name |
|---|---|
| 1 | I/P Compartment Lamp |
| Callout | Component Name |
|---|---|
| 1 | Left IP Harness |
| 2 | Turn Signal/Hazard Flasher Module |
Fig 15: Courtesy/Reading Lamps & Cargo Lamps Component View (Short Wheelbase Shown, Long Wheelbase Similar)
| Callout | Component Name |
|---|---|
| 1 | Courtesy/Reading Lamp-LF |
| 2 | Courtesy/Reading Lamp-LR |
| 3 | Cargo Lamp |
| 4 | Headliner |
| 5 | Courtesy/Reading Lamp-RR |
| 6 | Courtesy/Reading Lamp-RF |
| Callout | Component Name |
|---|---|
| 1 | Door Jamb Switch, Miniwedge-LR |
| Callout | Component Name |
|---|---|
| 1 | Liftglass Ajar Switch |
| 2 | License Plate Lamp Connector |
| 3 | Liftgate Ajar Switch |
| Callout | Component Name |
|---|---|
| 1 | Body Harness |
| 2 | Tail Lamp Connector |
| 3 | Tail Lamp |
| Callout | Component Name |
|---|---|
| 1 | Backup Lamps |
| Callout | Component Name |
|---|---|
| 1 | Frame Above Body Back Opening |
| 2 | Tail Lamp Connector |
| 3 | Tail Lamp |
| Callout | Component Name |
|---|---|
| 1 | Trailer Connector |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.