Question about 1996 GMC Sierra

Open Question

1997 GMC brakes Hissing sound when brake pedal is depressed and poor braking

Posted by Anonymous on

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad
emissionwiz
  • 85020 Answers

SOURCE: Air/Hissing Noise from Brake Pedal

this noise is caused by a defective power brake vacuum booster, (big round thing behind the master cylinder) the diaphragm is leaking vacuum.

Posted on May 06, 2009

Ad
  • 10 Answers

SOURCE: Air/Hissing Noise from Brake Pedal

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

Posted on May 29, 2009

litoshop
  • 298 Answers

SOURCE: brake pedal goes down to far abs brakes

Hi I'm litoshop if you bled the system and get no results then your brake pump needs to be replaced now before replacing make sure your pads are installed correctly because if there not this to can cause this problem good luck. if this information has been useful please let us know thank you.

Posted on Aug 11, 2009

  • 701 Answers

SOURCE: Brakes problem

jcakey: My name is Roger and I will answer your question for you. From what you describe the problem sounds like a bad vacum brake booster. A simple way to check is to do the following. With the engine off. Press on the brake pedal 4 or 5 times. This will deplete all vacum in the booster. Next start the engine while holding your foot on the brake pedal. The pedal should drop a couple of inches. If the pedal does not drop. The problem is the brake booster. When the booster is bad you will hear a hissing sound inside of the truck when you apply the brakes..
If the master cylinder is faulty you will wave mushy brake to no brakes.Your ABS and brake failure lights will be on. Should you need further help please just ask. I will be glad to help you. Please rate this answer as this is how we know your answer was useful.Thank You for using Fix Ya. Roger

Posted on Sep 09, 2009

wracefans24
  • 1985 Answers

SOURCE: 1997 GMC Sierra 5.7 changed master cylinder

check under your master cylinder,is there another clyinder below with one line in and one line out,if you do I found this is for the Abs to the rear,I had to replace this it was full of air,and did exactly what yours is now

Posted on Dec 09, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My brake pedal will not budge, and a hissing noise present when running


The stop lights won't go out until the pedal is depressed, as there is a switch which is activated by the pedal.

A hard brake pedal is probably caused by a defective servo. The hissing noise is probably an air leak in the servo.

Switch the engine on, open the bonnet (the hood..) and see if you can locate the hissing - that'll probably be in the brake servo area.

If you don't know what a brake servo looks like here is a generic image:



26071617-5gult0ot5kkhyupfos0rfps2-1-0.jpeg

Jan 27, 2016 | 1989 GMC Sierra

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

A hissing sound, and rpms drop when i apply the brake pedal,


You have a vacuum leak. Very possibly the brake booster or the vacuum line running to it

Jan 28, 2011 | 1997 GMC Sonoma

1 Answer

Air pressure sound when i push on the brakes


air pressure sound may come from a leaky vacuum hose or bad check valve at the booster or master cylinder.

But, I think that it's normal to hear a soft hissing sound when depressing the brake pedal which comes from hydraulic fluid going through the passage ways.

Is the pedal hard?

Sep 30, 2010 | 1997 Chevrolet Suburban

1 Answer

When I step on the brakes I hear a hissing sound. The breaks ar mushy and the RPMs increase when I am in park and I step on the brakes.


That sounds like the power brake booster unit is faulty and it will require replacing the power brake booster unit to repair the vehicle. Also, check to see if there are any vacuum lines running to the brake switch(s) on the brake pedal lever that might have come loose or are damaged.

Aug 15, 2010 | 1997 GMC Sierra

1 Answer

Brake servo making a hissing sound around the brake pedal but


The brake booster is shot, there is a rubber diaphram inside the booster and it must be ruptured and is leaking vacuum. You may want to go to; car-parts.com, to see if the salvage yards in area have a used one.

Mar 21, 2010 | 2006 Volkswagen Passat

2 Answers

1998 caviler when brakes are applied engine revs up


Hello;
Yoou most likely have a vacuum leak in the line from the booster to the intake. It could be a bad booster or check valve as well.
Thanks;
Rich
RPM Northwest

Jun 04, 2009 | 2005 Hyundai Tucson

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

2 Answers

Air/Hissing Noise from Brake Pedal


this noise is caused by a defective power brake vacuum booster, (big round thing behind the master cylinder) the diaphragm is leaking vacuum.

May 06, 2009 | 1995 GMC Suburban

2 Answers

Brake hissing noise


Sounds like it could well be the brake servo unit.

Mar 29, 2009 | 2005 Lincoln Navigator

Not finding what you are looking for?
1996 GMC Sierra Logo

Related Topics:

279 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

Marvin
Marvin

Level 3 Expert

85020 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22484 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...