i have a 02 3500 duramax that i love and i just bought a power pup from bully dog for it. my question is what setting are you guys running with no other modifcations. i plan on doing exhaust this summer, but right now the truck is stock. i tow a 6 tonnne dump trailer for a roofing company on the weekends. the programmer has 48hp setting, then a 69hp setting that says light towing but says must use pyro and boost guauges and then a 138hp setting that is i guess set to kill. do you think it will wreck anything on the 69hp setting and towing that trailer, and should i worry about not having the pyro or guages. your advice would be appreciated. you guys are great.