ive run the canned predator tune with my truck with pretty good results. dyno numbers are in the sig. but i think im gonna have HPP retune it and see if i can get a little better numbers, the service engine light off, and most of all an extra MPG or two. the AF with the canned tune is almost dead on (not sure about the timing), but it stumbles a little when i first shift to 3rd here recently. its been great in the winter, but heat has it doin weird stuff. but the miles are racking up, and the tune needs to be dead on, not so-so. how much is to be gained with a professional tune? ive got the vette now so i dont drive the truck too much bc it gets GALLONS PER MILE compared to the vettes 30mpg. im lookin for personal experiences goin from a can tune to a tuner tune...TIA:rockon: