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.

2010 Hummer H3T Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Trailer Lamp Control Module Replacement

WARNING: This page is about a different car, the 2010 GMC Canyon and 2010 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Trailer Lamp Control Module

Courtesy of GENERAL MOTORS CORP.

Callout

Component Name

Preliminary Procedures

Turn the ignition switch to the OFF position.
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

Trailer Lamp Control Module Bolt (Qty: 2)

CAUTION: Refer to Fastener Caution .

Procedure:
Loosen, but do not remove the bolts. It is not necessary to completely remove the bolts.

Tighten: 9 N.m (80 lb in)

Trailer Lamp Control Module

Procedure

Disconnect the electrical connector.
Slide the module upward to remove.
If installing a new trailer lamp control module, program the module. Refer to Control Module References .

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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.