Tow Haul.......When?
2003 GMC 2500HD pulling a roughly 11,000 LB 5th. Would you leave it in Tow/Haul on flat/level highways? Or do you put it in t/h and leave it?
Forum Discussion
When I'm hooked up I'm in TH mode! I might experiment with this on an upcoming trip to the keys to check MPG with it on -vs- off. Flat and straight, should be simple enough.
