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.
Programmable Parameters: Notes
The instrument cluster will display "TBC FAULT" if it is receiving communications from the trailer brake control (TBC) module but has not been configured for a trailer brake system. If the instrument cluster displays "TBC FAULT" and there are no DTCs stored in the TBC module, follow these procedures to verify and/or modify the TBC module programmable parameter in the instrument cluster.
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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.