2015 GMC Sierra 3500 - Check Trailer Wiring
We just purchased a 2015 GMC Sierra DRW with the Duramax and integrated brake controller. I hooked up the trailer (a 2013 Lifestyle 36FW with the standard electric brakes) for the first time and I dro...
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I have had to clean the plugs for the same reason. On our ford the truck is only looking for the trailer brakes. When I have a trailer hooked up with out brakes on it the truck doesn't know I have a trailer hooked up, when I put it in reverse it warns me I'm to close.
so you need to look at the ground and the brake wire and connections.
so you need to look at the ground and the brake wire and connections.
