Interesting, everything I would have guessed is brand new... Make sure to let us know when you figure out what'* causing it, I'm quite curious.
Originally Posted by 03BlackSapphireSLE
i too am having these problems but my car is stock..... did anybody notice his avatar picture? if those big ol aftermarket wheels are on his car i guarantee its not helping the situation. we all know these cars are sensitive to every little thing for that dreaded high speed vibration.
If you look at his photo album he has stock Pontiac wheels on, unless he changed them since then.