I have replaced rotors, calipers,brake lines,brake pads and the master cylinder. What could be the problem?
Sounds like the flex line is capillarying? It blows out inside the line and cause it to seize in the closed position, only one fix, replace it, common on chevy.
usually you purely could desire to bleed the line of whichever caliper/wheel cylinder you're changing. regardless of the undeniable fact that, being that it is a 1996, i could additionally recommend doing a brake gadget flush, as you likely have on no account replaced out the brake fluid
the brake caliper has been built to many times and needs to be replaced.,,,,,,,,,