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brake pedal wont build pressure

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New User

Oct 18, 2019, 1:44 PM

Post #1 of 2 (336 views)
brake pedal wont build pressure Sign In

2001 chevy blazer 70000 miles engine running brake pedal goes to the floor and hissing sound wont build any pressure. engine off will pump up. tried used master cylinder same results.

Hammer Time
Ultimate Carjunky / Moderator
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Oct 18, 2019, 4:07 PM

Post #2 of 2 (332 views)
Re: brake pedal wont build pressure Sign In

If you're hearing a hissing sound when you apply the brake, then you have a bad booster but I doubt that is the low pedal issue. There seem to be more than one problem.

What is the history on this? What led up to this problem? Any recent repairs?


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