1999 CHEVROLET SUBURBAN
96,000 MILES
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ANNWHIT
  • MEMBER
  • 3 POSTS
Both front driver and passenger brakes stick and will not release the wheels get real hot cant touch.Have gotten so hot they melted ABS wires so had to replace them.I have replaced the brake pads,calipers,rubber brake lines and master cylender new break fluid.What could it be.
Feb 28, 2013 at 9:40 PM
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CARADIODOC
  • CERTIFIED EXPERT
  • 34,306 POSTS
Next time they lock up, loosen the steel lines at the master cylinder. If that lets them release, the brake fluid was contaminated with a petroleum product. That will be a very expensive repair. If that appears to be the cause, get the brakes to lock up again, then loosen the mounting nuts for the master cylinder and pull it forward from the power booster 1/8". If THAT lets them release, check the adjustment of the brake light switch or for something else holding the brake pedal down a little.

If loosening the lines at the master cylinder doesn't help, loosen them at the ABS hydraulic controller. If that is what's holding the brake fluid under pressure, replace the controller.
Mar 15, 2021 at 11:33 AM
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ANNWHIT
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  • 3 POSTS
why can't I bleed the back lines
Mar 15, 2021 at 11:33 AM
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CARADIODOC
  • CERTIFIED EXPERT
  • 34,306 POSTS
What are you doing or what isn't working? Are the bleeder screws plugged with dirt? Does brake fluid come out if you push the brake pedal?
Mar 15, 2021 at 11:33 AM
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ANNWHIT
  • MEMBER
  • 3 POSTS
put new master cylinder on bleeding brakes then back ones just quit pushing out fluid. I adjusted the booster rod works now.
Mar 15, 2021 at 11:33 AM