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 MANUALSCHEVROLET2018SILVERADO 2500 HD WT, 2D PICKUP, 6.0L ENG VIN G, RWD, GASREPAIR AND DIAGNOSISBRAKESBRAKES CONTROL SYSTEMSTRAILER BRAKE CONTROLS SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC C111A: TRAILER BRAKE POWER CONTROL MODULE EEPROM ERROR/TRAILER BRAKE POWER CONTROL MODULE TEMPERATURE HIGHCIRCUIT/SYSTEM TESTING
2018 Chevrolet Silverado 2500 HD WT, 2D Pickup, 6.0L Eng VIN G, RWD, Gas
Circuit/System Testing
2018 Chevrolet Silverado 2500 HD WT, 2D Pickup, 6.0L Eng VIN G, RWD, GasSECTION Circuit/System Testing
- Ignition ON.
- Verify DTC C111A 54 or C1114 00 is not set.
- If DTC C111A 54 or C1114 00 is set
Refer to the diagnostic procedure for DTC C1114 00 to diagnose this concern.
- Go to next step: If DTC C111A 54 or C1114 00 is not set
- If DTC C111A 54 or C1114 00 is set
- Verify DTC C111A 43 is not set
- If DTC C111A 43 is set
Replace the K133 Trailer Brake Power Control Module
- Go to next step: If DTC C111A 43 is not set
- If DTC C111A 43 is set
- All OK
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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.