i had the same issue on my 2004 malibu classic. come to find out the semimetallic and the ceramic don't quite work the same on this car. After i replaced the pads back to factory. and readjusted the brakes. i was fine i still get a little drag but come to find out on mine it is from the custom wheels i have on my car. but all is well on the brakes....keep them clean and you should be fine.....the rear brakes on these particular cars tend to produce alot of dust. i now have my tires pulled every time i get an oil changed
