bigcahoonas10
Full Member
I have a 2011 Avalanche with 20's and 33 inch tires, I have a gibson cat back exhaust and would like to get some more power out of my truck but all of the pre loaded tunes reduce engine power. Does any one know of a good set up for a custom tune to give it more power? I will be putting in a intake soon to help but would like to use the tuner to the best of my advantage.