built in trailer brake controller
I have a 2008 Chev 2500hd Duramax with a built in brake controller. My question is: Does the tow haul need to be on for the brake controller to properly operate the trailer brakes on a fifth wheel rv....
Forum Discussion
You sure it's not other factors in the tow-haul mode making it SEEM like the trailer brakes are working better? Doesn't the Allison transmission downshift as you brake while in tow-haul mode, giving you some engine braking? I know mine does to a degree, and it's a much older model.
