I have a 2011 Camaro and I am having the same problem. The did have a forum on this 2 days ago and from what I can see it was deleted. I brought my camaro back to the dealer for this problem and they stated that the driveshaft was out of balance and changed it... did not fix the problem. The dealer stated that GM was showing that their were some complaints on this issue, but because their wasn't enough complaints that they weren't going to do anything about it. I did not pay $30,000 for a car to vibrate like it does....
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