Thread: need info and input on doing a swap on a series 3 05 grand prix to a supercharged

Originally Posted by FASGP

The Comp G is the step up to the top end above the GTP of these years. They had a few more bells and whistles, including the trans gearing for example...

so it was a gtp? or it was just a super charged gt? how can u tell the difference ive never seen a comp g badge or anything

Originally Posted by LSFoFaSho

so it was a gtp? or it was just a super charged gt? how can u tell the difference ive never seen a comp g badge or anything

The GT with L32 supercharged started in 06. Before that there were no GT's with L32, only GTP and Comp G. GP's with onstar antenna at front of roof are pre 2005, and at rear are post 2005. Comp G also had tapshift inside on steering wheel.

3.05 gears on L26?

Yes, GT trans with L26 was 3.05 ratio.