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
NJRVer wrote:
I have an '09 and my brakes worked normal with tow/haul on or off.
^^^^ this x2.
The downshifting and "slower" shift points in Tow/Haul mode noticeably improve the authority of starting and stopping my 2009 2500.....if the trailer brakes seem better with Tow/haul on, I'd estimate that it's the general improvement of Tow / Haul being on, not any effect on the trailer brakes.
