My 07 Avalanche 5.3 with DOD and cat back only. Is it really worth me taking the time to learn this damm gen 4. The VE tables look like a PITA to do. The 99Z looks very simple compaired to this. And at least with the Z there is a plie of mods so tuning was a must and big hp maker.
Guys with stock trucks, did you get much for MPG or performance? I am not talking about the neck snaps from jacking up the shift points and psi.