Tow haul switch???
So now that I have a 2003 gmc k2500HD extended cab long box to tow our fifth wheel, am wondering how to use tow haul switch, do I activate the whole time towing fifth wheel?
Forum Discussion
The is an indicator on the dash that will say Tow/Haul, at least there is on my 2002. Don't over think it. You will know when it's on because it changes the shift points. Also, there is no harm in leaving it on. I will sometimes turn mine off while towing at slower speeds to gain an upshift at a lower speed than afforded by Tow/haul. The Tow/haul helps reduce torque converter temperature, which is a definite advantage.
