I currently have 265/75-16 tires on my 2003 Silverado 1500HD crew cab 4x4 truck. It has 4.10 gears and I am getting about 13 mpg. I will pull a 30' camper 2 or 3 times a year and haul my tractor a little locally. Will 285/75-16 tires hurt or help my milage? I haven't pulled anything with it yet but it seems to have plenty of power what little I have drove it. I bought this truck the Friday before Christmas. Monday after Christmas a deer hit me starting at thr right front fender and went all the way down the side, fender, hood, both doors and bed. Sure made me sick. All fixed now just burning a lot of gas. Will the 285's clear on the front without cranking up the torsion bars? What are your thoughts on a Bully Dog E-3 programer. I bought one but have not installed it yet. I want to get this P1516 code problem cleared up first.