I have a 04 chevy 2500 HD 6.0L with a cat back magnaflow exhaust, and an aftermarket intake, its leveled and on 33's. i know very little on programmers and i need some help picking out the right one that would work great with my truck. thanks

 

Blackbear performance, gowheatley.com, or check to see if you have a place that can do dyno tunes