Hey Brother don't let this shake get your GS Chin on the ground..

I have a GS, run two set of wheels and tires. I do not have any steering wheel issues. The tires have been swapped blaaa blaaa. My point is get them rebalanced on a better quality high speed balancer.

If the issue still remains, drive the car (use caution) let go of the wheel, accelurate and apply the brakes, checking for straight tracking.

With the engine off check your degree of free play. How much will the steering wheel "free play" from left to right before the tires move. If there is excess free play, the steering needs tighten up. This can be done. I'm not the expert on this, but, I know some one in here is.

If you find resolution, please post update.
Good Luck Boxcar

Thanks Bud, Will check this out next outing.Unfortunateley w/work don't have a lot of free time.But hey Ive been looking at your tracking vids and it looks like you are having a blast.And yes will get tires rebalanced etc and i'll keep ya'all updated.Keep your eye out for my "garage" pics.Try not too laff too hard.Will