[old_master]

VERY common problem. Each time the rear disc brakes are serviced on GM S & T body vehicles: resurface or replace the rotors, and use loaded rear calipers. They come with pads, calipers, hardware and the mounting bracket. The caliper is aluminum with a phenolic piston, great set up, for the life of the brake pads, then it's time to replace it all. Check the park brake adjustment also: Back off the adjuster cable then remove the rotor, small adjuster toward the top of the backing plate, adjust until park shoes have slight drag on drum, then readjust park cable. Lube all slides and reassemble, problem solved!