New GMC 2500 Wont Engage Trailer Brakes
I have a new 2021 GMC 2500, Diesel. It will not engage trailer brakes unless the brake pedal is mashed to the floor. It is this way on any trailer it’s hooked up to. My 04 Silverado works fine on my t...
Forum Discussion
So GM has sent engineers out and they can't figure it out but maybe someone here can? Doesn't it have a factory brake controller?
