parking brake

Hello, My parking brake on my 2004 Tahoe does not return when I pull the release lever. The parking brakes still work, and I can pull the release lever and pull the brake pedal up, and the brake release. I have removed the pedal assembly, and can verify that it moves freely. However...

I have an 05' Tahoe and last time I pushed the parking brake pedal down I heard a "pop" noise. The brake will now not engage, the brake line does not appear to be broken under the car and the release cable is still functional. The brake pedal just won't engage. Has anyone encountered a...