I have a 07 g6 convertible gt with about 10k miles. When driving around 65-80 mph I get lot of feed back in peddle, seat and some time but not as much in the steering. It has been to the dealer 6 time but they either say nothing is wrong with it and it's the road (road is smooth and my lifted jeep with aggressive tires don't have the same problem) or they either rotate the wheels or grind the brakes. I also hear air gushing sound out of the right front when I hit the bumper and when I break I hear similar sound from right side. Anyone has this same issue? I have also been looking in the forum for aftermarket shocks to maybe help with handling.