the screws on the rotors??? lol, i drilled them bad boys out!!! but yeah, i had a sticking brake problem w/ my teggy on the passenger/rear caliper. And since i didn't have money at the time i bought me some authentic brake caliper rebuild kits...BLAH!!!...it took me like three hours for the first caliper and 2 for the other rear caliper. it is tedious, and way cheaper than buting a rebuilt one or a new one. the actual caliper itself doens't go out. it is the internals that go out..also check your slave cylinder and the problem may just be your proportional valve. the the chances of the proportional valve going out are like the chances of you dating brook burke. but anyways, check your brake line and maybe you have a dent on the steel lines and replace the old ugly oem rubber lines w/ some nice purty steel braided lines. but i hope that helps you out a bit.