What could be causing vibration at freeway speed on my GM 3899 Sedan?

Answer by  CapnAnswers (39)

One of the most common reasons why a car may be having "shakes" or just be pulling to the left or the right is that you simply have mud under your tires. Taking a pressure house underneath you rims will most likely fix this problem, or you may just need to realign your tires.

Answer by  Travis404607 (3916)

Vibrations on a car are normal as a car ages, but excessive vibrations can be an indication of tire issues. If the tires are low, or there is uneven wear, this can definitely cause serious vibration noises at high speeds.

Answer by  Amber40 (24961)

Vibration at highway speed could be a few different things. First check to make sure that the wheels are aligned and that they properly balanced. Then look under the car to make sure you suspension components are all tight and the bushings have no play.

Answer by  Chiyamaka (846)

This is most likely because you are too close to the side of the road. There are strips near the sides that make a lot of noise to wake up those who fall asleep at the wheel. You're probably driving on them.