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.
2003 Hummer H2FACTORY OEM SERVICE PROCEDURE
Lighting Systems Component Views
WARNING: This page is about a different car, the 2004 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
| Callout | Component Name |
|---|---|
| 1 | Roof Lamps - Center Front |
| 2 | Clearance Lamp - LF |
| 3 | Marker Lamp - LF |
| 4 | Park/Turn Signal Lamp - Left |
| 5 | Headlamp - High Beam/Low Beam - Left |
| 6 | Daytime Running Lamp (DRL) - Left |
| 7 | G100 |
| 8 | Forward Lamp Harness |
| 9 | Daytime Running Lamp (DRL) - Right |
| 10 | Headlamp - High Beam/Low Beam - Right |
| 11 | Park/Turn Signal Lamp - Right |
| 12 | Marker Lamp - RF |
| 13 | Clearance Lamp - RF |
| Callout | Component Name |
|---|---|
| 1 | Center High Mounted Stop Lamp (CHMSL) |
| 2 | Roof Lamps - Center Rear |
| 3 | Clearance Lamp - RR |
| 4 | Backup Lamp - RH |
| 5 | Turn Signal Lamp - RR |
| 6 | Tail/Stop Lamp - Right |
| 7 | License Lamps |
| 8 | Trailer Connector |
| 9 | Tail/Stop Lamp - Left |
| 10 | Turn Signal Lamp - LR |
| 11 | Backup Lamp - LH |
| 12 | Marker Lamp - LR |
| 13 | Clearance Lamp - LR |
| Callout | Component Name |
|---|---|
| 1 | I/P Compartment Lamp Connector |
| 2 | I/P Compartment Lamp |
| 3 | Courtesy Lamp - Right B Pillar (Right Side Similar) |
| 4 | B Pillar Trim Panel |
| 5 | Body Harness |
| 6 | Left Front Door |
| 7 | Courtesy Lamp - Left Front Door Connector |
| 8 | Courtesy Lamp - Left Front Door (Right Side Similar) |
| 9 | Brake Pedal Assembly |
| 10 | Stop Lamp Switch |
| 11 | Footwell Courtesy Lamp - Left (Right Side Similar) |
| 12 | Data Link Connector (DLC) |
| 13 | Fuse Block - I/P C1 |
| Callout | Component Name |
|---|---|
| 1 | Courtesy/Reading Lamp - Center |
| 2 | Courtesy/Reading Lamp - Front |
| 3 | Courtesy/Reading Lamp - Front |
| 4 | Overhead Console (w/o Sunroof) |
| 5 | Courtesy/Reading Lamp - Rear |
| 6 | Liftgate Ajar Switch - Left |
| 7 | Liftgate Ajar Switch - Right |
| 8 | Liftgate Harness |
| 9 | Junction Block - Rear |
| 10 | Chassis Harness |
| 11 | Turn Signal Multifunction Switch |
| 12 | Headlamp and Panel Dimmer Switch |
| 13 | Vanity Mirror Lamp Connector - Left |
| 14 | Vanity Mirror Lamp Connector - Right |
| Callout | Component Name |
|---|---|
| 1 | Off Road Lamps - Switch |
| 2 | Overhead Console w/Front Courtesy/Reading Lamps (CF5) |
| 3 | Off Road Lamps - Roof |
| 4 | Relay Block - I/P |
| 5 | Relay Block - I/P C7 (Off Road Lamp Harness) |
| 6 | Off Road Lamps Relays |
| 7 | Instrument Panel Rail |
Factory Service Tools
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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.
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