Question about 1999 GMC Jimmy

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The brake pedal on my '99 Jimmy, has always gone low when stopping. Anyway to adjust it? No leaks and new brake lines...

Posted by Debra Dykstra on

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5 Related Answers

Anonymous

  • 259 Answers

SOURCE: brakes not working

sounds like you still have air in the brake lines i would try to bleed them again hope this helps regards Jim

Posted on Apr 07, 2009

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Anonymous

  • 8 Answers

SOURCE: Brakes are gone

check ur brake lines for posible leaks. also make sure to bleed your brakes after you put fluid into it or else the air won't come out of the brake lines causing ur pedal to still go to the floor

Posted on May 27, 2009

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Anonymous

  • 175 Answers

SOURCE: front brakes stay locked up

You may want to replace your flexible feed lines to the calipers. Any little bit of **** in them will not let the brake fluid out of the caliper,

Posted on Jul 29, 2009

Richard Delahant

  • 1201 Answers

SOURCE: Brake pedal still goes to floor 2000 GMC Jimmy

It's very possible to be the master cylinder, the o-rings on the piston could be worn, letting the fluid seep back through instead of getting full pressure through the lines. Could also be the brake booster.
Try changing the master cylinder first, which is cheaper and easier, and see if there is a difference, you'll need to bleed the brakes again.
To check the booster,
With the engine off, pump the brakes until the pedal is hard, then hold pressure on the brake pedal and listen for air escaping, or the pedal goes slowly to the floor, Do that after the master cylinder has been changed, at least that will be eliminated.

Posted on Sep 15, 2009

Testimonial: "Hadn't thought about the O-rings on the rod thanks for the idea. Great Idea Thanks!"

bbbman78

Drew Z

  • 681 Answers

SOURCE: I have a 2000 Jimmy and the signal lights nor

Most likely the combination/multifunction switch (turn signal lever). It can be changed without taking the steering wheel off, but not a job I would recommend if you have minimal experience. Since one of the (pair) wires go across the top of the column and connect to the shift safety switch on the right side of the column. The rest of the wires go to the main plug lower left of the column. The knee bolster is usually removed (plastic piece of dash by driver's knees). Shouldn't take a mechanic over an hour/ hour and a half.

The reason it stops when you depress the brake pedal is because your brake lights, and flashers use the same bulb.

Hope that helped, thanks for using FixYa.

Posted on Mar 30, 2010

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My break pedal I have to pump twice to stop, I checked the pad and shoes, they are in good condition. what I don't know is how to set the E break?.


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First open and inspect all brakes for leaks, adjustment, etc. Check all brake lines.
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Dec 13, 2010 | 2000 GMC Jimmy

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mcdevito75 here, True a bad Master cylinder but you can"t rule out a major leak, look carefully for brake fluid leak, also chek fluid in master cylinder if low, fluid going someplace, have the shop check it out.

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