Brake controller
Ok I have a 2007.5 GMC 3500HD diesel with the integrated brake control, when I hooked up to my fifth wheel it used to show on the DIC "trailer connected" and when I pressed on the brake the led dots w...
Forum Discussion
Trailer sockets do go bad. Dirt and corrosion. Do you know someone with a trailer where you could plug into it to isolate the problem? Could be RV plug, PU socket, or the brake.
