I would like to get a programmer for my 06 and i dont want to spend a WHOLE lot of money. Never gonna race the truck just want some mpgs, more PIRE! and maybe a lil smoke. Anybody got any used ones? Will it adjust the odometer for diff tire sizes? I will also eventually be getting cold air and i have no muffler only factory 4" and converter. My truck has 34000 miles on it and i was curious about having the trans serviced. An old man pulled a camper with it and I dont know if hes ever had the belts tightened??