I own a 2009 Pontiac G8GT, this car is my baby and has been since day 1. I noticed a vibration in the steering wheel. I took it into a GM Dealer who said, "all 4 rotors need to be turned". The car only has 13, 122 miles on it. The explanation is that I live in a hilly area and geogrphically it's hard on rotors??? I've had 5 other new GM vehicles and nevr had this problem this early on. This is considered a high performance vehicle and I drive it gently how many miles would it have been for a driver that actually uses the car... read full review »