Manual Trailer Brake Apply Request Signal 1 Malfunction
Table of contents
C1116 GMC Possible Causes
- Faulty Manual Trailer Brake Apply Request Switch
- Manual Trailer Brake Apply Request Switch harness is open or shorted
- Manual Trailer Brake Apply Request Switch circuit poor electrical connection
- Faulty Chassis Control Module
How do I fix code C1116 GMC?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the C1116 GMC code
The cost of diagnosing the C1116 GMC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Anti-Lock Brake System (ABS) Warning Light ON
- Engine Light ON (or Service Engine Soon Warning Light)
C1116 GMC Description
The trailer brake control system has a control panel with the trailer gain and manual apply switches. The switches are located on the instrument panel to the left of the steering column. The control panel and switches allow you to adjust the amount of output, referred to as trailer gain, available to the electric trailer brakes and allows you to manually apply the trailer brakes. The trailer brake control panel, and switches are used along with the trailer brake display page on the driver information center to adjust and display power output to the trailer brakes.