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When i press the brake pedal on my 2003 chevy tahoe there is a loud whooshing sound, what is causeing this?

New brake lines, new brake fluid and brakes bled, but have no pressure when I press the brake pedal and I get this whooshing sound from under the dash around the brake pedal area, why? and how can I fix it?

Posted by Gerald Johnson on

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1 Answer

Joe Stanton

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  • Cars & Trucks Master
  • 1,154 Answers

You have a bad vacuum booster. The diaphragm in the booster is ruptured resulting in vacuum loss and no power assist to the brakes. Do not drive in this condition, loss of control (stopping) hazard exist.. Replace Power Brake Booster. Since replacement of the booster requires removal of the master cylinder, replace the master cylinder as well, It is old (2003) and time for replacement

Posted on Jul 17, 2017

  • Gerald Johnson
    Gerald Johnson Jul 17, 2017

    thank you will replace it tomorrow.

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5 Related Answers

Anonymous

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SOURCE: 2006Vito.Bled all callipers now pedal drops underfoot

hi,replacing all brake pad are not required to bleed the brake system,brake pad goes in flooring because the system have air,abs system is out,try to bleed the system again,if not bring to your dealer,they have a bleeding machine,ty

Posted on Mar 22, 2009

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Jonah Oneal

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SOURCE: brake pedal losses pressure 1 to 2 pumps back to full pressure.

you still air in system or a bad master cylinder or brake booster.

Posted on Apr 03, 2009

Anonymous

  • 607 Answers

SOURCE: Noise under dash when applying brake pedal

Well, now being 60, might be a bit of a challange for me , but if I had to..... anyway dress comfortably, push the front seat back as far as you can. Now lay on your back looking up UNDER the L/S of the dash where you hear the noise and LOOK. for something loose. Open the hood, look for something loose under the L/S of the windhield. Nothing to lose. Hope this helps

Posted on Apr 20, 2009

Anonymous

  • 232 Answers

SOURCE: brake light stays on after replacing brake line and bleeding

You may need to do a code scan,this will reset the computer and reset any codes if the brake problem has been taken care of.Autozone Shucks/Kragen/O'Reilly's will do this for free.

Posted on May 31, 2009

2coolrick

Cool Blue Services

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SOURCE: Have prodigy trailer brake control Have

When installing the trailer break controller, 4 things must be considered carefully and objectively . 1.Safety regarding the mounting of the controller with respect to the drivers ability to control the vehicle without any hindrance whatsoever . 2.The dirvers ease of access (and control) of the coltroller while actually driving.....not sitting in the driveway....and lastly.... 3. The expected and assured 100% faith in the controllers ability (by the driver) to function without failure (no exceptions allowed) AND as designed to function (not ***-u-med), by properly mounting the unit and performing the correct electrical aspects of the installation without "shortcutting or jerry rigging" (no exceptions allowed)
4. The trailer brakes themselves. Ie. Shoes, drums, actuators, mechanical and electrical components etc. And last.....but too often forgotten....axle bearings maintenance / checkups / and tires condition and proper air pressure attained with a reliable tire guage....Did I mention checking the trailer lights functions ??? Good Luck...Happy Safe Motoring..

Posted on Sep 05, 2010

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2 Answers

Replaced some brake line, rear pads and one rear wheel cylinder. Now no pressure and nothing happening when trying to bleed.


Does the car have ABS ? And does it have an equalizer block for the 4 wheels ?
It sounds like the ABS has been affected, or there is an equalizer block that is stuck on the front wheels only.
Can you open the bleeder or the rear line on the master cyl and get fluid to come out by depressing the pedal ?

Jul 07, 2013 | 1997 Mercury Tracer

1 Answer

2001 Silverado 2500 HD Why Rear brakes don't work after I installed new hydro-boost power booster, master cylinder, calipers, and pads. I bled master cylinder before installing, and brakes beginn


Hello Patricia,

Have you checked the master brake cylinder reservoir for brake fluid loss?

I don't suspect the master cylinder as you have replaced it... but am more suspect of a leaking brake line or fitting which should have
been discovered when you had the system bled.

The only time I ever had a rear brake problem with a 2500 series Chevrolet was due to seized rear brake caliper guide pins...as your calipers are also new that is not your problem.

If your brake pedal feels spongy and travels to the floor board you have air in the system, a brake fluid leak or a failure in the power steering system, such as a broken hose, broken power steering pump drive belt, or failed pump, would result in a loss of pressure to both the hydro-boost and steering.

Find more information here:

. Hydro Boost Power Assist Systems Operation Diagnosis and Repair

Jul 23, 2017 | 2001 Chevrolet Silverado 2500HD

1 Answer

No fluid to right front brake 1998 toyota sienna


Remove the line from the caliper and have someone press the brake pedal lightly. (Be carefull not to let any fluid get on vehicle paint it will damage it.) If fluid comes out then the caliper is frozen and a new will be needed. If u do not get any fluid then the brake line is probably collapsed inside. You may get some fluid to drain with the line loose and no pressure applied to pedal. Then when you depress the pedal the fluid stops. If this occurs the line is collapsed inside and blocking flow when placed under pressure. In that case a new line will be needed. The only other thing I can think of at the moment would be a pinched metal line somewhere on the vehicle, however, that is unlikely.

Mar 31, 2013 | 1998 Toyota Sienna

1 Answer

No brake fluid to the rear wheel cylinders


You'll need to start bleeding the brake system at the Master cylinder to determine where the problem lies.

The lines coming out of the master cylinder will need to be loosened & bled there, initially you can just do the back ones to identify the problem, but once fixed, the system will have to be bled from the Master cylinder first, then the farthest wheel from it, then next farthest, then next, until you do the drivers wheel last.

This method of bleeding the brakes prevents air from crossing from one line to another, causing air to be left in the system.

Back to bleeding the rear brakes first: As someone pumps up the brake pressure, making sure the resivoir stays full, with the cap on between bleeding, and have the person pressing the pedal to do these thngs.
1. Always move the pedal slowly, pressing and releasing.
2. Never release the pressure on the pedal after bleeding a brake, until the line is tightened, then release slowly to prevent air from getting into the fluid.

You should of course get fluid at the master cylinder when you bleed it (or just replace it), then you'll need to bleed the line at the right rear wheel (first) a few times to get fluid if it's been leaking, then the left rear wheel. If you get pressure but no fluid to the rear and the master cyliinder did have pressure released when you bled it, there is either a restriction in the line itself, or the porportioning valve could be damaged. (unusual for the valve to go bad actually, inspect lines for damage such as being pinched if you're getting pressure but no fluid.

Final test if it hasn't been resolved-remove lines at porportioning valve & make sure fluid is leaving/entering there as it should. If you find it defective, a good replacement can come from a salvage yard, or you can buy them new.

Brake fluid on the floorboard under the dash near the brake pedal=bad Master Cylinder.

good luck

Feb 21, 2010 | 1996 GMC Jimmy

3 Answers

Replace brakes. now they go to the floor. bled air


When you fixed the brakes, did you take the lid off the master cylinder. I just wonder if you spilled out your brake fluid. The only reason the pedal should go to the floor is if the brake fluid is gone or the master cylinder is not working. Check the fuse. Check the brake fluid level. The pedal only goes to the floor if there is no back pressure in the lines between the master cylinder the lines to the brake pistion on the calipers. Please give me a good ratin and keep me informed.

Jul 07, 2009 | 1999 Cadillac DeVille

1 Answer

Put new rear rotors and pads on my 2002 I35 Infinity, now have very weak pedal , have to pump the brakes in order to stop, doesn't maintain pressure.


Doesn't sound like the brake lines were bled properly. Many times after pad and rotor installation if the lines are bled correctly you will have to pump them initially after the repair for a couple of minutes until the pressure is built back up. Also check the master cylinder and make sure fluid level is ok.

Apr 13, 2009 | 2004 Infiniti I35

1 Answer

Is the brake booster going out?


Let me know what you find out. I get the same whoosh/pedal travel, and at this point have NO braking at all. I am also losing fluid nearly as fast as I can put it in if I use the brakes, but I can't find where it's coming out. I even drove on clean snow and don't see any fluid tracks...

Oddly enough if you are going to do it yourself, gmpartsdirect seems to have the best prices for OEM parts.

I am assuming that my rusted/pitted brake lines have failed me. Aaahhh the old money pit.

Jan 13, 2009 | 1999 Pontiac Grand Am GT

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