Every day I get in here, I wish I could take it back. I have 735 miles on the odometer and it's already been "fixed" by the dealer once. I'm driving down a state highway and the rattle is non-stop. Shouldn't be posting from my PDA, but I figure a tree or ditch incident would shut this thing up. I have owned three f-bodies that I've tracked and autocrossed and tbey were/are not anywhere close to being as noisy. It's coming from a few different spots too. Worse, my incompetent dealer not only didn't fix the rattle, when they replaced the seat that was delivered with a rip, they gave the car back with the seat belt unscrewed from the floor and gouges in the inner door sill that they initially denied making. The new leather seat cover is looser than the original and honest to God, the service advisor told me it would probably tighten up over time. I thought GM had changed.