I'm new to the tuning game so I don't want to screw with too much until I understand what and why to adjust. I will try the Diablo tune next with the AFM off. Thanks

I just picked up a U7194 for my 2007 Chevy Avalanche LTZ and would like to know what tune you would suggest. I have a K&N cai and replaced the stock muffler with a Magnaflow performance muffler. Also cut off the resonator, replacing with straight piping. I installed the 87 tune and turned off the ...