I have a 2003 duramax 4x4 dually and live in the mountains. Have gotten good at driving with tow haul even with no load.(like the shifts and less braking). Will this hurt anything driving with tow/haul and no load everyday? or should I just us when haulling heavy loads?:cool:

I'm not a expert on these but frim everything I've read I don't think it will hurt it...Someone correct me if I'm wrong

It won't hurt anything. I use it a lot. It just makes the tranny shift at higher RPM's and locks the TC in 2nd, 3rd, 4th, and 5th. If anything it will decrease your fuel economy due to the higher RPM's and let the TC run a bit cooler.