[bwood]

I had a very similar issue with my Mom-n-laws 99 S10 Blazer. Calipers stuck all the time, turned the rotors blue. I pulled a caliper and when I forced the piston back in with a c-clamp, rusty nasty brake fluid came out. I also replaced the calipers, lines, pads and rotors. I also just kept let the rear lines run fluid out constantly while keeping the MC full until I got clean fluid out. She doesn't drive it much and I assume moisture built up in the rears due to a damaged seal or something.