Question about 1997 Chevrolet Blazer

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97 Blazer brake pedal making hissing sound

When i apply presure on the brake pedal there is a long hissing sound coming from the pedal....i'm not losing any brake fluid but the car did cut off on me a few times.....help!!!

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Sounds like a vacume leak from power break booster, when you loose vacume it will stall out the engine if enought vacume is lost. chk. power break booster. and hose from engine leading to booster for vacume leak, booster is under hood, break master cyl. bolts to it.

Posted on Feb 21, 2009

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Posted on Jan 02, 2017

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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

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1996 Buick Park Avenue Ultra making a hissing noise when I press Brake Pedal. Have to Press super hard to stop or slow down.


Sounds like a possible air pocket in the braking system. Do you know how the bleed the brakes? They may need to be bled. Also, if you've added brake fluid recently, and didn't put the cap back on, it could create a suction. Another note is to check the cap to the brake fluid reservoir. It's rare, but, it could be bad.

Jul 10, 2013 | Cars & Trucks

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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

2000 Chevy K3500 No Breaks. Bled breaks, not losing fluid, ABS and break lights on. Hydraulic booster system. makes hissing sound when breaks applied???


I think I would get the body computer scanned for trouble codes and find out why the ABS warning light is on first.
The hissing noise usually means the booster is leaking vac but if the booster was faulty the brake pedal would be hard to push.

Feb 09, 2013 | 1998 Chevrolet Blazer

1 Answer

2001 ford escape makes a hissing and high pitched squealing sound when the brake pedal is released?


You need to have the brakes inspected. This noise is the brake pad wear warning tab hitting the brake rotor.;

Jun 27, 2012 | Cars & Trucks

1 Answer

Why would my brakes hiss when I step on them and cause the engine to rev up when I do this? It also makes the vehicle very hard to stop.


It sounds like your brake booster is leaking. The air hissing is the air going into the leak. This extra air goes into the engine and causes the engine to rev up. The booster is what makes it easy to push the brake, (when it is working correctly) which is why the pedal is hard to push.

May 31, 2012 | Chevrolet Blazer Cars & Trucks

2 Answers

My brake pedal hisses when i apply perssure on the pedal


if it is squishy when you press it you may have air in the lines and you need to bleed them out.

Jun 30, 2011 | 1991 Chevrolet S-10 Blazer

2 Answers

Brake pedal goes to floor when first applied. Fluid within limits. No signs of leak(s). Hissing sound noted. No vibration.


Hissing sound indicates booster diaphragm has torn. Please let me know if you would like instructions for replacing the booster.

May 28, 2011 | 2008 Toyota RAV4

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