2000 GMC Sierra brakes

2000 GMC SIERRA
72,000 MILES • V8 • 2WD • AUTOMATIC
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JOHNMHURT
  • MEMBER
  • 1 POST
was having no problems with the brakes and all the sudden the pedal went almost to the floor. could pump them and it would come up some. next time i drove it, it worked fine for a while then started it again. am not loosing any fluid. if you keep pressure on the pedal it will slowly go to the floor.
Sep 3, 2009 at 3:10 PM
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DOCFIXIT
  • ✓ASE Certified Mechanic
  • 18,828 POSTS
  • ASE Certified Mechanic
Classic signs of a faulty brake master cylinder. Internal piston seals gone.
Sep 3, 2009 at 3:42 PM
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