I beg to differ. VectorMotorsports power flash can restore stock tunes. The flash counter is not active in our ecu. I also have a friend who is a gm mechanic and he checked mine after I put the stock tune back in and he knew nothing different. All info came back as if it were a unmodified car. Also if it were tuned don't you think big brother would know and send a flag out? My diagonostic was just run and I have my tune in and everything was problem free. Call Vector Motorsports they can clarify all of this up for anyone. Lot easier to talk directly then to bounce back and fourth on the forums of he said she said.