ROTORS/BRAKES

Are you putting GM rotors on the car? Factory rotors dont warp as easy as aftermarket rotors. i have done many brake jobs with aftermaket rotors and usually have this problem. I heard from an old time mechanic that if the rotors are stored on their side the could cause them to warp. I have no clue if it trure but it sounds good right. I put factory rotors and pads on my truck and have to problem. I put aftermarket rotors and pads on my car and they pulsate a year later. Hopefuly you had a warranty.

driving habits are major contributors to warping rotors. they overheat when long braking occurs. make sure whoever does the job properly torques the wheels as that is another common reason Roy