Brake caliper issues

[Tony Stewart]

I have a 2000 Tahoe. Both of my back brake calipers are doing the same thing. One piston will extend the other will not.

Can this be fixed by replacing the calipers? I have flushed the brake system with fresh fluid and that did not help. I was just wondering if this was a caliper issue or an issue further up the system. It seemed strange that it is happening to both. I have really uneven wear on the inside pad.

Also with only one piston contacting the pad, could this cause noise in the rear end?

 

[iLikeEggs]

Sounds like the gasket on the piston is worn out. Either rebuild or replace the caliper and you should be fine. If you want to know why that squared edge o-ring works and/or then doesn't work, I will be happy to totally bore you with the details.
As far as your noise, if the piston is not returning it can cause a "hanging " condition and keep the pad in constant conact with the rotor. If the noise is a scraping noise then yes, that could be the problem.