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.

2016 Buick EnvisionFACTORY OEM SERVICE PROCEDURE

Headlamp Control Module Replacement

WARNING: This page is about a different car, the 2016 Buick LaCrosse. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Headlamp Control Module

Courtesy of GENERAL MOTORS COMPANY

Callout

Component Name

Preliminary Procedure
Remove the instrument panel wiring harness junction block. Refer to Instrument Panel Wiring Harness Junction Block Replacement .

Headlamp Control Module

Procedure

Disconnect the electrical connectors.
Unsnap to release the module from the bracket.
Refer to Control Module References for programming and set up procedures.

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.