Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 GMC Sierra 3500 HD, 2015 GMC Sierra 2500 HD, 2015 GMC Sierra 1500, 2015 Chevrolet Silverado 3500 HD, and 2015 Chevrolet Silverado 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
- 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.
- 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
- If DTC C111A 43 is not set
- If DTC C111A 43 is set
- All OK