2010 chevrolet cobalt ss. very loud brake squeal coming to a stop 20km and under (louder than a city bus). this has occurred consistently from 2500km. the car has been in the shop a dozen times, every time they machine the brakes and tell me the squeal is normal for high end brakes. i have driven porches, high end performance vehicles like sti's, 350z's, s2000's even high end bmw's, corvettes and ferraris, none of which have a "normal" squeal. *tr