OK so I'm a newbie to this. I'd like some pointers on tweaking the tune on an '05 Ion Redline. No mods yet, however, going to the GMPP Stage 2 Upgrade for sure. I would like to do a bit of a smaller pulley on it-2.9 or 2.8 Need some idea where to start as far as tweaking the s/w. I'm looking for mid range increases opposed to huge dyno numbers-butt meter rules here. Car will be driven daily and fuel mileage is of relative importance-will rarely see more than 6500 RPM (that's when it gets shifted). Haven't done the mods yet-will after the holidays as well as purchase the HPT suite at the same time. I'm just looking for some good advice and starting points to start tweking and turing dials-the help would be much appreciated!