Forum Discussion

EnzoColorado's avatar
EnzoColorado
Explorer II
Oct 30, 2023

"Service Trailer Brake System" message on Suburban

In August during a camping trip, the message "Service Trailer Brake System" came on the dashboard when the trailer was not connected to the Suburban. I checked all the fuses and they were good. I ho...
Tow Vehicles
Krusty's avatar
Krusty
Nomad II
Nov 06, 2023
I agree it is likely a corrosion related issue and you should inspect the trailer connector and the wiring that connects to it. Not sure what modules you were able to read with your code reader, but typically they are only good for the PCM, so there could be several other modules with faults that you are unable to detect.

About Tow Vehicles

From fifth wheels to teardrop trailers and everything in between.206 PostsLatest Activity: Mar 15, 2025