Tow Haul
Just wondering when to use Tow Haul? I know down hill is the best but any thoughts on the flat or uphill or just all the time?
Forum Discussion
It will depend, like others said, your individual truck and what your owner's manual says. When I had my 2005 Chevy 2500HD I didn't use it much when I towed heavy, except when climbing hills. My particular truck did not have grade braking, and in hot weather the transmission would actually run 10-20 degrees hotter with tow/haul engaged. Other users have reported cooler trans temps, and grade braking would be a very useful feature, especially combined with an exhaust brake.
