Quote Originally Posted by Kaiser Pontiac View Post
If I remember my research correctly from ClubGP (I think), they could have everything except 3.29s... Wasn't the CompG and GXP trans the same? I actually saw one of these weird '05s on Craigslist a couple months back that had everything (TapShift too), but it wasn't a CompG. There's a digit in the VIN that can tell you if you have 3.29s too.

Sent from my LG G4 using Tapatalk.
Comp G trans had 3.29s, GXP had 2.93s. I never understood why, except maybe for longevity purposes, but that's out the window with the GXP anyway. Other than the gearing, they're the same. The Comp G was the only 04+ GP that came stock with 3.29s, which is why I figured some of these might have them - once the Comp G was discontinued, they didn't have another vehicle for those leftover transmissions to go into. They still made the GXP for 3 more years, they didn't have to get rid of any leftovers