Have a 02 Chev Suburban 1500, 4 wheel drive with wheel disc brakes. When the vehicle is cold the brakes are fine. The more you drive the rear calipers will start to not release all the way and keep pressure on the rotors to the point that you start to get a brake smell from the right rear wheel. The eight rear wheel seems to be worse than the left rear but both are having an issue. I have checked the parking brake shoes and they are ok. You can let vehicle sit for about 15-20 minutes and the calipers will release to normal. Any sugestions????