•  karjunkie 07/09/09 8:29 am PST The GTP model was added to the Pontiac line up in 1991. However, the supercharger was not added to the GTP model until 1997.

•  karjunkie 07/09/09 8:29 am PST Edit Answer (for another 6 minutes) The GTP model was added to the Pontiac line up in 1991. However, the supercharger was not added to the GTP model until 1997.