Question about 1998 GMC Jimmy

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How do i properly bleed out my Jimmy?

How do i bleed my 1998 Jimmy? I put new rear calipers on and new pads all around, and bled out all four wheels, but the pedal still goes to the floor, and the brake light comes on.

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  • aknightstale Apr 21, 2009

    Thanks Rick...this did the trick for me...

    appreciate the quick response.

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I use a vacuum bleeder (abt $35) starting at the furthest brake line from the master cylinder & working my way back to the closest. If bled properly by keeping the maste cylinder full, this should solve your problem. Rick

Posted on Apr 15, 2009

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Time to redo the bleeding of the system again...starting with the master cylinder...you do not have to remove the master to re-bleed it. disconnect both brake lines from the master, and start again by pushing pedal to floor, and rebleed each line at the master...this is critical to work properly...you mentioned new master cylinder, if remanufactured I would return it. As noted above, after confirming the master is fully bled...rebleed each caliper beginning with the rear, farthest away from the master...you must have "air" in the brake lines. Hope this helps.

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I assume you mean that you replaced the front pads and rear shoes. Or did you also replace the disks and drums?? Either way you should be ok unless you also replaced the slave cylinders on the rears.
The fluid flows back up to the Master Cylinder as you squeeze the calipers and the slaves to fit the new parts in. Some people pre-fill the caliper to reduce the amount of air and make bleeding easier.Now .....Grinding better be a wrong choice of words. Possibly you spilled fluid on the pads while bleeding the lines. This will cause a binding and shuddering when you apply brake pressure. This will also make you think the lines are not bled properly because of the increased pedal pressure you are putting on the wet/lubricated front pads. If so, replace the pads. Don't try washing them with aerosol cleaner cause it takes more time and money than simply changing them.

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You need to bleed the whole system. Once this is done it should work better. Make sure you are not low on brake fluid. If the front brakes are disk brakes and the rear are drum breaks, the front really does most of the stopping, the back jjust keeps the car from spinning or swaying. But the main stopping power is in the front breaks. They need to be bled correctly, make sure brake fluid is up and make sure emergency break is not engaged. The emergency break uses a lever and cable to activate the rear brakes. The emergency breaks don't run off brake fluid...

please give good ratings, they are very important...

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