Question about 1999 GMC Yukon

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1999 Yukon. My brake pads are good. I replaced the master cylinder, and bled the brakes. My brakes still fade away to the floor. Any suggestions?

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  • Christopher Foulkes Jun 05, 2010

    Have you checked the wheel cylinders to make sure they aren't leaking? How about adjusting the shoes?

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  • Master
  • 2,702 Answers

If its loosing brake fludid find out were its leaking out,,
its got to be a brake caliber or if not one of them and your happy with the master cylinder then have a realy good look at your brake servow it could be leaking into that

Posted on Jun 05, 2010

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Posted on Jan 02, 2017

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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

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Just replaced rotors, calipers, caliper brackets, and pads. Bled all four wheels, starting with the farthest away from the master cylinder working my way to the closest. Brake pedal feels firm when car...


Bleed with the car running and make sure all the air is out. Now make sure there is no leak and the pad contact are adjusted without much gap so that the calipers hold on. make sure the servo assist is correct, if so and the master cylinder was set right , it must work. Please recheck all your work once again to trim up.

Sep 28, 2010 | Nissan Xterra Cars & Trucks

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Brake pedal goes to floor,replaced front pads rear good,bleed brakes no help


Hi:
If you have replaced all pads, and see no leaks at any wheel, and have bled your brake system, then most likely your brake master cylinder has failed.

Dec 18, 2009 | 2001 Ford Taurus

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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

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Brakes are still spongy after changing the pads, one caliper, and master cylinder. bled front brakes.


I just went to Brake Masters this morning and had them replace the Master Cylinder since I was experiencing the pedal very spongy and going to the floor. When they replaced the Master Cylinder and they gave me back the car, the brakes were still spongy and going to the floor. I addressed this to them and they took another look at it, but when I took it for a second time, the brakes were extremely spongy. It was almost like they gave me back my car in worst condition to when I brought it in. Can you help?

May 21, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Brakes to the floor(almost) 99 blazer


bleed the brake again. if the pedal goes to the floor with little resistance, then the master cylinder is your problem.
the shim is to depress the noise when you applied the brake. you can skip that, if the brake works without it.

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1 Answer

2001 quest nissan brakes problems


then you either have a bad master cylinder or there is sti air in the system trapped.

go here for help

http://autos.groups.yahoo.com/group/villagerquest/

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