Trailer Lamp Control Module Replacement

WARNING: This page is about a different car, the 2021 GMC Sierra 3500 HD and 2021 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
Preliminary Procedure Raise and support the vehicle. Lifting and Jacking the Vehicle Lower and reposition the spare tire.
1	Trailer Lamp Control Module Bracket Nut[2x] CAUTION: Refer to Fastener Caution . Tighten 9N.m (80 lb in)
2	Trailer Lamp Control Module Procedure Disconnect the electrical connector. After installation, program the trailer lamp control module. Control Module References

Callout

Component Name

Preliminary Procedure

Raise and support the vehicle. Lifting and Jacking the Vehicle
Lower and reposition the spare tire.

Trailer Lamp Control Module Bracket Nut[2x]

CAUTION:

Refer to Fastener Caution .

Tighten
9N.m (80 lb in)

Trailer Lamp Control Module

Procedure

Disconnect the electrical connector.
After installation, program the trailer lamp control module. Control Module References