I have a 1-week old '09 SS/TC coupe and the steering wheel shakes intermittently around 55-65 MPH. Took it back to the dealer for the usual wheel balance & alignment, of course they found nothing wrong and couldn't duplicate the problem. They told me its "road feedback". Yah, right.

It doesn't do it all the time and I'm sure its not loose lug nuts, bent rim or a lost wheel weight. It almost feels like the electric steering is trying to overcompensate. It is very noticeable on newly paved roads. The car is absolutely stock with 800 miles on it.

Has anyone else experienced this? Thanks.

Does I Happen All The Time Or Only After Car Sits For Several Hours. There Is A Tsb On
Continental Tires Flat Spotting After Sitting For Several Hours. Hope That Helps.
Can Feel It In My 2008 Ss After It Sits All Night. Once Tires Warm Up It Goes Away.
Can Find Tsb On Alldata.com. Tsb Only Mentioned Continental Tires Sport Contact 2

It pretty much happens all the time. Last time was on the way home from an 85-mile trip. I do have the Continental tires though. Thanks for the post!