Sounds like the brake rotors are warped.
Usually caused by over or uneven tightening of lug nuts.
On my last car i went through 4 pairs in 35,000 miles due to the dealer making lugs as tight as they could.
I only paid for the ones last year that i installed and stopped letting them work on the car.
The rotors aren't that hard to do. When I did mine last year and mine the brakes on my dad's Monte it was the first time i ever work on brakes and i had no issues.
For his the dealer wanted $275 for just new rear rotors.
I did the rear rotors and pads and front pads all for $120.
Auto zone has them for $45 each.
Last edited by bbrewbaker; 03-24-2010 at 03:19 PM.