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...
Forum Discussion
My 2008 IBC was replaced under factory warranty. Don't remember what message but similar to what you quote; however I also had same messages when things were wrong such as loose connection.
