pontiacgp said:if it is a prototype and was used for testing and it comes without a title then why does it have over 15 thousand miles...the main reason they put a long window in the back was to stop the rear of the car getting lifted from the vacuum that was created by the flat back window, which in turn slowed the car down. Even the rear spoiler on the nascar body didn't help that problem so I don't see how that low rear spoiler had any effect on the problem they had..plus with the suspension on that car I don't know what testing they actually did with it sitting so high..
As mentioned, the explaination of the mileage is simple if it was a GM test car as claimed. The suspension on that car appears to be stock ride height for any G-body.