I have a similiar question…maybe someone can help me as well. 99 grand prix, 200k. Same scenario as mentioned above…rear disc w/drum inside. Changed rotors and pads a couple of days ago….not calipers. Ran the car several miles and pulled into the garage. Rotors are HOT and I mean HOT! Assumed calipers were shot, so replaced calipers last night. Drove a few miles…same result, but only on driver side. What else could be causing this? Do I need to push a bunch of brake fluid through that line….maybe some debris plugging on the return? Caliper still pushes back in fine w/ clamp, but will not return on own once pressure is built up?
Any suggestions? I am frustrated w/ this one.