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.
2018 GMC Acadia SLFACTORY OEM SERVICE PROCEDURE
Headlamp Control Module Replacement
WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
| Callout | Component Name |
|---|---|
| Preliminary Procedure Remove the rear compartment side trim panel - right. Refer to Rear Compartment Side Trim Replacement - Right Side (Sedan with AM9)Rear Compartment Side Trim Replacement - Right Side (Sedan except AM9)Rear Compartment Side Trim Replacement - Right Side (Coupe) . |
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| 1 | Headlamp Control Module Procedure
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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.