Just got my 09 GT500 a few weeks ago. The original owner had a 2.6 pulley and a SCT tune done on the car. Now when I go to get the car inspected some of the senors don't register when they hooked it up to the computer like the O2, O2 sensor heater, and the catalytic conv. I did not get the scanner with the car (had know idea to ask for it). Is this common with a SCT tune to have sensors not register and can you tune a car back without having the original tune data? I have a place that said they can program the car to pass and then set the tune back up but this is freaking me out a bit. Going cost me the for the scanner and the tune which is no big deal.
