Don't know either way, but when I got my TTA at the the GM Indianapolis auto auction in the summer of 1990, I was told that my TTA was a VIP car used by industry people and others to drive around Indy. It's a leather T-Top car. IDK, either way, just glad it's a TA with the V6 turbo and not the 350TPI motor, which they had several of...but hey, I saw a GNX convertible at that auction several months ealier, so who knows what was going through the GM auction back then. My dad told me that it wasn't unusual for GM people to drive prototypes to the auction which were never up for sell but parked in the area.
Wish I had my iphone back then, I would have killer pics.