I just bought my '08 LE this past friday. Ocassionally when freeway driving, the steering wheel shakes a bit. This is my first truck so im not sure if this is normal or not. One thing that is buging me though is my passenger seat shakes all over the place when im driving. Its like if someone is pushing it from behind trying to shake it. I also noticed my passenger side mirror shakes as well. Im thinking it has a bad vibration on the side of the truck. Anyone else has any problems like this?