Generally your gonna have to wiggle and yank the **** outta the caliper once you get it un bolted. And yes PB Blaster is a great idea. If it doesnt wiggle at all and you cant feel any play in it, you havent unbolted something you need to. Look on the back side, its probably hidden pretty well. Once your sure you get all the bolts out take a pry bar to an exposed side and lift that sucker out.