[CREWZIN]

The Stage 1 isn't a chip. Chrysler keeps the programing as a highly regarded secret and apparently nobody has been able to get it (that I know of). The Stage one for the 03 GT is a new computer and upgraded (larger) injectors. I don't think you can tell just by looking at it. It's possible if you take the VIN number to a dealer, they can look it up and see if it's been upgraded to Stage 1. The owner needed to supply the VIN to the dealer in order to buy the upgrade so the PTs history should have information on it.