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.
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HOMESERVICE MANUALSGMC2013SIERRA 2500 4WD V8-6.6L DSL TURBOREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - BRAKES AND TRACTION CONTROLTRAILER BRAKE CONTROL MODULESERVICE AND REPAIRTRAILER BRAKE CONTROL MODULE REPLACEMENT (2500, 3500 PICKUP)
2013 GMC Sierra 2500 4WD V8-6.6L DSL Turbo
Trailer Brake Control Module Replacement (2500, 3500 Pickup)
2013 GMC Sierra 2500 4WD V8-6.6L DSL TurboSECTION Trailer Brake Control Module Replacement (2500, 3500 Pickup)
Trailer Brake Control Module Replacement (2500, 3500 Pickup)
Removal Procedure
1. Place the ignition switch in the OFF position.
Note: Do not remove the spare wheel hoist.
2. Remove the spare tire and wheel assembly. Refer to Spare Wheel Hoist Replacement Service and Repair.
3. Disconnect the trailer brake control module and trailer brake control relay electrical connectors.
4. Loosen, but do not remove, the trailer brake control module bracket bolts (1).
5. Slide the trailer brake control module bracket toward the right of the vehicle and remove assembly from the vehicle.
6. Loosen, but do not remove, the trailer brake control module bolts (1).
7. Slide the trailer brake control module (1) to remove the module assembly from the bracket.
Installation Procedure
1. If installing a new trailer brake control module, partially install the 3 trailer brake control module bolts.
2. Install the trailer brake control module (1) to the bracket.
3. Slide the trailer brake control module in the bracket until the module bolts are resting against the back of the bracket slotted holes.
Caution: Refer to Fastener Caution Fastener Caution.
4. Tighten the trailer brake control module bolts (1) to 6 Nm (53 lb in).
5. Install the trailer brake control module and relay bracket assembly to the frame.
6. Slide the trailer brake control module bracket assembly fully into the slotted holes of the vehicle frame.
7. Tighten the trailer brake control module bracket bolts to 9 Nm (80 lb in).
8. Connect the trailer brake control module and trailer brake control relay electrical connectors.
9. Install the spare tire and wheel assembly. Refer to Spare Wheel Hoist Replacement Service and Repair.
10. If installing a new trailer brake control module, program the module. Refer to Control Module References Control Module References.
RENDER: 1.0x
NO RELATED
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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.