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
Body Control System 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 | Instrument Panel |
| 2 | Body Control Module (BCM) |
| 3 | Transfer Case Shift Control Module |
| 4 | Transfer Case Shift Control Switch |
| 5 | Transfer Case Shift Control Module |
| 6 | I/P Harness |
| 7 | Transfer Case Shift Control Module - C3 |
| 8 | Transfer Case Shift Control Module - C2 |
| 9 | Transfer Case Shift Control Module - C1 |
| 10 | Headlamp and Panel Dimmer Switch |
| 11 | BCM - C1 |
| 12 | BCM - C2 |
| 13 | BCM - C3 |
| 14 | BCM - C4 |
| 15 | BCM - C5 |
| 16 | BCM - C6 |
| 17 | Body Harness |
Factory Service Tools
Use the Manual With the Right Hardware
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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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