Quote:
Originally Posted by 2013_GMC_BLACK_SLT
Frank,
I was already thinking about a tune. What do you suggest. What did you change with your factory tune? I also have the 5.3
|
I have a person that lives not far from me that uses the EFI Live programs. He downloaded the stuff for my 2011 and we used his computers to setup a new fuel map, adjust the tranny shift points (made them tighter to eliminate slow shifts) and moved the fuel cutoff up to a point where it will not affect higher speeds (the original cutoff is at 93 MPH). I also installed a CAI kit and a set of long tube headers to get the engine to operate more efficiently. The truck runs like a little hotrod now.