I thought that tint was standard, not an option, at least on the 2002 AVs, regardless of what model. My 2002 is a very early unit (June 4, 2001), GM couldn't get the tinted windows, so the rear doors came without the tint, the window sticker had a credit for it. The rear window was tinted. When the rear window frame broke GM replaced it under warrenty. I asked for a no tint window replacement and got one, so now none of my windows are tinted. I think some of the early 2002s also came with a no tint rear window.
What year Av do you have, what is the build date or frame build date?
Drivers door jab has the month it was built, the frame under the front passenger has the frame build date (about one week prior to the official build date), and the dealer service dept can provide the actual build date with the VIN.
The no tint rear window means that the auto diming drivers side mirror now works perfectly. With the rear tint, the rear view mirror gets less light, and doesn't need to dim as much. It feeds the drivers side mirror, which then doesn't think it needs to dim as much either, and was almost useless with the tinted rear.