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.
2008 Hummer H3 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Headlamp Leveling Module Replacement
WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
The headlamp leveling module is not serviced separately from the headlamp assembly. If the headlamp leveling module needs to be replaced, the complete headlamp assembly will need to be replaced.
Replace the headlamp assembly. Refer to Headlamp Replacement .
Refer to Control Module References for programming and setup information.
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.