Question about 1997 GMC Jimmy

2 Answers

How do I bleed the brakes. I just bought my jimmy from my boyfriends parents, and dummy me didnt check the brake fluid, until now. I replaced the fluid as it was very low, now the pedal goes to floor.

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  • mike loshbough
    mike loshbough May 11, 2010

    If you were low on fluid and the peddle goes to the floor You have a leak somewere.

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  • Master
  • 15,935 Answers

This is not something you can do yourself. you will need an assistant.
Each wheel will need to be done.

Jack up the vehicle and support it safely.

Remove the tire.

Locate the bleeder device on the top of the caliper.

Attach a length of hose from the bleeder valve into a bucket.

Fill the brake fluid reservoir.

Loosen the bleeder valve (approximately 1/4 turn) and have your assistant push the brake pedal.

If no fluid comes out - loosen the bleeder valve until fluid starts coming out.

Once fluid stops coming out... tighten the bleeder back and have your assistant let the brake pedal up

Tell the assistant to press down slowly to the floor... and loosen the bleeder again.

Once the pedal is to the floor - and fluid stops coming out - re- tighten the valve.

Repeat until only fluid comes out - no bubbles.

If after all 4 tires are done, and there is still sponginess in the pedal, it is likely a more sever problem like the master cylinder, equalizer, or booster.

Most chain shops (Midas, Sears, etc) offer a free inspection service, and if it is simply air in the lines can bleed the system for you for under $35. (well worth it)

It will take you approximately 2-3 hours if you have never done it before (assumed because you dont know how) and they can do it with a bleeder machine in less than 1.

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Posted on Sep 24, 2009

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  • Master
  • 733 Answers

Start one wheel at a time. it goes from the one furthest from the master cylinder on forward. right rear(bleed out all the air), left rear, right front, left front. make sure you dont see any air bubbles when bleeding the lines, then go on to the next wheel. make sure your master cylinder is topped off every time you do each tire side(very important).

Posted on Sep 24, 2009

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