Car has the shakes once in a while
I have a strange problem with my car. It is a 2005 base model coup. So no antilock brakes, or anything else special.
A while ago I had the tires rotated. 2 days later I was driving down the interstate, and the car started vibrating slightly. At first I thought I lost a weight off one the wheels or something. When I applied slight brake, it vibrated more. Then I took an off ramp, and it dissappeared. So I figured maybe it was the road.
A week or so later it happened again. Except it went from the interstate, down an off ramp, and onto another road. Maybe 2 or 3 miles. I came to a stop light, and applying brakes hard enough to make the car stop made it really come to life! It was shaking so bad I had a water bottle on the floor bouncing into the air. When the light turned green, I started off again and there was no more vibration.
I checked all 4 wheels, and they are all bolted on securely, and straight. The tires are not wearing funny at all. At all other times, the car drives smooth. No hint of a tire being out of balance.
I'm hoping someone here can help me. It has only happened those 2 times, and GM can't fix something they can't reproduce. But I don't feel safe at 65mph anymore. Could it possibly be a brake issue? What do you guys think?