SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC
UNEVEN WEAR IN THE BRAKE ROTORS. GM HAS REDESIGNED THE ROTOR BECAUSE OF THIS PROBLEM AND THE CAR HAS BEEN IN FOR SERVICING TWICE REGARDING THIS PROBLEM. BECAUSE CAR IS NOW OUT OF WARRANTY, GM REFUSES TO FIX IT EVEN THOUGH THEY ACKNOWLEDGE IT WAS INCORRECTLY REPAIRED PREVIOUSLY AND IS A KNOWN PROBLEM. THE UNEVEN WEAR CAUSES A SHIMMY IN THE CAR AT FREEWAY SPEEDS. ACCORDING TO GM SERVICE BULLETINS, IT GENERALLY HAPPENS AFTER ABOUT 7000 MILES FROM LAST BRAKE SERVICING (AS IS THE CASE WITH MY CAR. *AK