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1986 GMC Suburban No power brakes

Tiny
LYNNPOM
  • MEMBER
  • 1986 GMC SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 30,000 MILES
When you depress the brake pedal it is very to push down, like there is no power brakes. There are not warning lights. Brakes themself are fine. Also when you pres on the brakes it makes a hissing noise like air is escaping
Monday, July 27th, 2009 AT 3:26 PM

2 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
You have a faulty brake booster. The big can thing between master cylinder and firewall.
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Monday, July 27th, 2009 AT 3:36 PM
Tiny
BUDDYCRAIGG
  • MECHANIC
  • 2,262 POSTS
Oops, posted 1 minute too late.
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Monday, July 27th, 2009 AT 3:37 PM

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