This is a 2015 Sierra with 6.2l and mild cam, headers, intake and 3000 stall converter. The thing runs like a rapped ape once it goes full throttle but on the lower side of the rpms whether its 4 auto launching it by holding the brake or by just the hit it seems the throttle isn't opening at the same rate the pedal is floored. The throttle blade doesn't seem to go wot until around 3000 rpms. Makes it kinda lag out of the whole. I done all I can think of to make it follow the pedal to no avail. Even tweaked the VTT and made no changes. Attahced is the tune and the log if anyone can take a look.