2000 GMC Yukon brake pedal to the floor

Tiny
DON CARNIATO
  • MEMBER
  • 2000 GMC YUKON
  • V8
  • 4WD
  • AUTOMATIC
  • 45,000 MILES
MY 2000 YUKON XL BREAK PEDAL SUDDENLY WENT TO THE FLOOR WHEN I APPLIED THE BRAKES. THE MASTER CYLINDER IS FULL, NO LEAKS. I ASSUME THE MASTER CYLINDER IS BAD. PLEASE GIVE ME YOUR OPINION. IF YOU AGREE, PLEASE PROVIDE THE CORRECT BRAKE BLEED PROCEDURE FOR THIS VEHICLE.

THANK YOU
DON
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Monday, December 22nd, 2008 AT 11:35 AM

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Tiny
BRIAN 1
  • MEMBER
Unbolt the master from the brake booster first and check the back of it, sometimes the seal at the back of the master cyl leak. Also check brake lines and calipers for any leaks. If you do decide to replace the master cyl, you will need a tech 2 to perform an automated bleed to get all the air out of the sys if you don't do this you will never get a brake pedal. Post back with any other questions.
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Monday, December 22nd, 2008 AT 4:54 PM

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