I have the MAX ENERGY Hypertech for my 5.2. I am currently on 35'' tires, so I programmed the truck's speedometer for 35'' tires. When I hit the highway, it seemed like it was saying i was going much faster than I really was.
When I got home, I measured my tires. From the ground to top, they were only measuring around 33''.
Have my tires wore that much?? The air pressure is fine.
ANYWAY, I re-programmed for 33'' tires. Should I program for 33'' tires or 35'' tires?