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95 chevolet surban making hissing noise when applying brakes

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Sounds like you have a vacuum leak to or from power brake booster. Check vacuum hose & plastic check valve that plugs into booster on the back of master cylinder. If hose or fitting not broken or collapsed most likely booster is leaking vacuum & will need to be replaced.

Posted on Oct 11, 2010

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Posted on Jan 02, 2017

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95 Chevy Tahoe had both front and back breaks replaced. Now a week later I hear a hissing noise when i push on break pedal and it's hard to push and barely stops .


You have a iar leak on the vacumn pipe which is most likely or the diaphragm inside the servo has split so ask a local mechanic for a opinion

Jul 25, 2014 | 1995 Chevrolet Tahoe

1 Answer

Hissing brakes


IT is probably a vacuum leak in the brake booster. With the pedal going to the floor There is either no brake fluid or you will have to bleed the system. Replace the booster and bleed the brakes starting at the longest line first

Oct 08, 2013 | Dodge Neon Cars & Trucks

1 Answer

Brake Problem


yes but up to a point
the brake pedal should move about 1" to take up the pedal free play and then be applied smoothly as you press further
the harder you press the more solid stopping action you will get
that way you can feel the brakes working so that you can adjust the braking action for stopping
there should be no hissing noise that occurs when the brakes are being applied
you say hydro booster which is hydraulic booster but a hissing noise will come from an air leak in a vacuum brake booster which indicates that it needs repalcing

Apr 16, 2017 | 2001 Dodge Durango

1 Answer

Brakes hissing noise


If the sound is heard when the barkes are applied it is due to worn out brake pads or brake drum.
You need to jack up each of the wheels and manually check if there is softness of the brake in any of them which indicates that the brakes are not fully holding on resulting in wiping noise as the hiss.
Remove the suspected brake assembly and replace.

Sep 06, 2011 | GMC Envoy Cars & Trucks

2 Answers

Hissing sound from under the driver's side of


Yes sound like brake booster. most of time when booster is going bad makes hissing sound when brake applied.But should not make any kind of air leakage noise at all.Replace brake booster.Hope this was helpful for you.

Nov 23, 2009 | 2003 Ford Expedition

1 Answer

When the brakes are either applied or released there is sometimes a hissing(air)noise from the brakes.front brake pads have recently been changed but the noise was there before they were changed


the noise you can hear may be coming from the brake system booster.. This is a vacuum system and the hissing noise may be from a leak into the vacuum chamber in the booster. My advice is to take the vehicle into a reputable mechanic and have it checked professionally..

Oct 31, 2009 | 1998 Volvo V70

1 Answer

Brake noise


replace the master cylinder bleed valve

Jun 23, 2009 | 2003 BMW 325

2 Answers

Air/Hissing Noise from Brake Pedal


air may have gotten into your brake lines. try bleeding your brakes. this will require two people

May 29, 2009 | 1995 GMC Suburban

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