You have stuck pistons on one side of the caliper.
Rebuild, or replacement, time.
That will be your decision.
FYI.
Look in the for sale section.
I have a rebuilt pair, ready to go, if you might be interested.
If I rebuild, can I just do the passenger side, or is it like brakes always are where I need to rebuild both sides?
As a college kid on break, I have more time to spare than money, so rebuild sounds more appealing
