Originally Posted by BonnevillesSince62

Have someone with access to GM'* service system run a VIS (Vehicle Identification System, or something like that). It shows the GM service history of the car. It'* very likely that the SRTA was put in by a dealer. Otherwise, it was purchased from a dealer and installed independently. I'll PM you an email address for a guy I know that will run it for you. Any GM dealership service department can do it, but they may or may not. I used to run them all the time working as a service advisor. You also get your car'* "birthday", the SPID sheet showing all the option codes and their meanings, the delivering dealer, etc.