Question about 2000 GMC Sierra

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I am having a problem bleading my 2000 grand pris brakes. check all the brake line no leaks but when i bleed the brabe pedal coes to the floor. i have also bleeb frunt to rear and rear to frunt.

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This is a two person job. You have one push the brake pedal to the floor and hold it there. Then the other opens the bleed valve until brake fluid comes out. Close the bleed valve and have the other person release the brake pedal. Repeat. Continue doing this on each brake bleed valve until there is no more air coming out of the lines at each bleed valve just a solid stream of fluid. Fill master reservoir back up with brake fluid as needed through the process. You bleed from farthest to closest meaning from rear to front.

Posted on Aug 05, 2010

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1994 Jeep Grand Cherokee brake pedal goes all the way to the floor. Recently replaced calipers and master cylinder and bled the whole system. Brake pedal goes all the way to the floor when first pushed...


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Did you keep the brake fluid reservoir from going dry while bleeding? If it went real low, air might have got back into the lines.

It is not uncommon when bleeding brakes on an older vehicle for the master cylinder to suddenly develop an internal leak and require replacement . Here's why: pushing the pedal all the way to the floor causes the master's piston to push in farther than ever before. The rubber cups then travel over a section of the cylinder not usually touched by the cups-old fluid can develop a crud there and when the piston pushes over it, the cups can get ruined. To avoid this when bleeding brakes, put a short piece of 2X4 wood block under the pedal. Then the pedal will not extend the master's piston beyond it's normal travel. Of course on a new master cylinder, you do not have to do this. A new master cylinder does require bench bleeding before installing, however, to ensure no air pockets develop from there.

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Brake petal goes to floor


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