Increase MPG
I have a 2014 GMC Sierra 2500HD with the 6.0 gas burner. I have been looking at computer programmers and air intakes. Has anyone done any of these mods and did it increase your MPG any?
Forum Discussion
in my opinion there all hipe and on a new truck I,D worry it would effect the warrennty. remember those on board computers remember everything you do to your truck.
