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Home >> GMC >> 2013 >> Sierra 1500 Denali, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1778 (Trailer Brake Control System) >> Repair Instructions >> Trailer Brake Control Module Replacement (3500 Chassis Cab) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2011 GMC Sierra, 2011 GMC Cab & Chassis Sierra, 2011 Chevrolet Silverado, and 2011 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Place the ignition switch in the OFF position.
  2. NOTE: Do not remove the spare wheel hoist.
  3. Remove the spare tire and wheel assembly, if necessary. Refer to Spare Wheel Hoist Replacement .
  4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  5. Fig 1: Identifying Trailer Brake Control Module Bracket Bolts
    GM2442949Courtesy of GENERAL MOTORS CORP.
  6. Loosen, but do not remove, the trailer brake control module bracket bolts (1).
  7. Disconnect the trailer brake control module and relay electrical connectors.
  8. Fig 2: Identifying Trailer Brake Control Module And Bracket Assembly
    GM2442953Courtesy of GENERAL MOTORS CORP.
  9. Slide the trailer brake control module and bracket assembly (1) toward the right side of the vehicle.
  10. Remove the trailer brake control module and bracket assembly
  11. Fig 3: Identifying Trailer Brake Control Module Bolts
    GM2442963Courtesy of GENERAL MOTORS CORP.
  12. Loosen, but do not remove, the 3 trailer brake control module bolts (1).
  13. Fig 4: Identifying Trailer Brake Control Module
    GM2445183Courtesy of GENERAL MOTORS CORP.
  14. Slide the trailer brake control module (1) to remove the module from the bracket.