I have an 08 Silverado Crew Cab with the rear drums and every once in a while when I come to a complete stop the rear brakes seem to "release" just a little bit, you can hear it and feel it. Its nothing major but sometimes a nusiance, and people ask what it is. I'm not sure if there is a fix for it or if anyone has this problem too? My cousin seemed to think it was the rear diff but I dont think thats it...any help is greatly appreciated!!