New Carpet
Year One perhaps? Other alternatives?
Sites like this say they have it:
http://www.carmotorsports.com/carpet...com/carpet.htm
I think I have even seen it on GMpartsdirect but I haven't heard of any feedback so I didn't want to steer you in their direction until I knew if you were going to get something good enough.
I have gotten on the MPG bug and managed to pull down really good numbers even with mods by removing needless things from my car or replacing with lightweight. You'll see your numbers go down more than you think. I believe my factory carpet was 35 lbs. The rear felt was an additional 2.

