auto tap is what i use. you plug the device into your port under near the gas pedal and its hooks up to a laptop via usb. You can read all kinds of crap with it.
just make sure you get one that has "GM Enhanced Parameters."
HP Tuners has a scanner version of their software you can buy, or you can just get the tuner suite that includes a scanner. Not sure how much you're wanting to spend on this stuff, though. HPT is $350 for the scanner only and $500 for the tuning suite.
you mean i cant just load in a premade file and go like all the subaru guys do and think they are cool? damn.![]()