Okay, found this on Media GM by clicking some link... 2003 SE, SLE and SSEi movie to download the whole thing it will be about 300mb per model or you can download the smaller clips... There is also a pre-production GXP... (03 models no sound, but on the 04 GXP it has sound!
Enjoy and tell me what you think of my findings.
Put the whole thing in to get to the site and that area of it. I don't think most people are suppose to be in there lol thats why the link only worked for part of it. Paste it in your browser in go! The GXP is a 3800 Series III with a supercharger like orginally planed, that is the first stage of GXP model shown then there were to with the Northstar and slight variations and then the production model.
Sorry for the edit it was a proto-type and that was shot in early 03 or late 02 because they changed it to a N* about then.
Correct me if I am wrong I was not into the Bonneville'* as much but still loved them lol. Thanks guys enjoy and tell me what you think.