| i'd recommend breaking the system and getting the caliper in a vice. remove the piston dust boot (if it's there). soak the piston in brake fluid. evenly, and gently compress the piston using the vice. this should break the 'seal', allowing you to use pressurized air to pop the piston out (VERY DANGEROUS, take precautions). worst case, you'll have to just replace the caliper. considering it's a single piston floating caliper, i'd bet they can be had for $30.oo on trade in at Autozone.
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