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 had the same issue with my new Ram. No issue with the old truck snd aftermarket brake controller, but as soon as I hooked up the new truck I got the check trailer wiring message.
I fiddled around with everything from cleaning contacts to changing the RV plug. Nothing worked. Finally took the RV into the dealer after trying a new rv on the lot with no problems. Turns out my rv had a faulty brake on one axle.
I fiddled around with everything from cleaning contacts to changing the RV plug. Nothing worked. Finally took the RV into the dealer after trying a new rv on the lot with no problems. Turns out my rv had a faulty brake on one axle.
