I am considering purchasing a HyperTech Tuner for my 05 Chevy Avalanche 5.3L. Can anyone who has one tell me 1-are they worth the price? 2-what improvements did you notice? 3-what settings did you program in? I added a K&N #77 Cold Air Intake, AirAid PowerAid Throttle Body Spacer and a MagnaFlow SS Single Exit CatBack Exhaust so far. I am happy with the sound, power, throttle response, and gas savings these mods have provided but want MORE!
MooseAlanche  

I dont know a whole lot about hypertech but one of my friends has one on a 04 chevy 1500 and he likes it, when he punches it at 30, his truck will go sideways,But Im not sure what he programed it to. Did you notice a difference when you put the throttle body spacer on, Im looking at getting one but didnt know if it was worth spending the money on.