Question about 1985 GMC C1500

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Why i can't get pressure at the clutch slave cylinder

We put in a brand new slave cylinder and have bled it many times and can't seem to get the pressure that is needed. We used brake fluid, is this a mistake or what else can we do to fix this problem.

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  • Contributor
  • 14 Answers

Start by checking the clutch master cylinder and if that's fine you might have a clog hose

Posted on Jan 06, 2013

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

maklean
  • 1665 Answers

SOURCE: '92 Jimmy rear brake failure

Have a look at bleeding procedure OF BRAKE SYSTEM. i think it helps.
There are no special bleeding procedures for the ABS SYSTEM. For bleeding, please use the standard rules as described for the conventional brake system as follows: 1. Remove the reservoir cap and fill the brake reservoir with brake fluid.5eb649a.jpg
Do not allow brake fluid remain on a painted surface. Wash it off immediately. When bleeding by pressurized fluid, do not depress the brake pedal. 2. Connect the vinyl tube to the wheel cylinder bleeder plug and insert the other end of tube in a half-full container of brake fluid.
1a15ab3.jpg 3. Slowly pump the brake pedal several times. 4. While depressing the brake pedal fully, loosen the bleeder plug until fluid starts to run out. Then, close the bleeder screw. 5. Repeat steps 3 and 4 until there are no more bubbles in the fluid. 6. Tighten the bleeder plug screw. 7. Repeat the above procedure for each wheel in the sequence shown in the illustration.
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Posted on Sep 22, 2008

ifixgms
  • 64 Answers

SOURCE: 1995 gmc sierra clutch pressure problem

could be wrong here but sure sounds like its out of fluid at the "master cylinder" look near the brake master cylinder for a seperate little container for the clutch. bleeding is tricky because it is small and wants to run out of fluid quick. you have to keep adding each time you bleed. Hope I helped. Thanks

Posted on Apr 06, 2009

  • 66 Answers

SOURCE: Poor Braking power- new cylinder-new lines new ABS module -bled

i have ran into this problem , but on earlier gm products---check the local dealership or a well known mechanic shop that has all data and check for bullitains. what i had found out was there was some trucks that gm had installed the wrong power booster . not saying your booster is to blame, but may be a great place to look seeing you replaced abs modules ,master cylinder ect---hope that helped out!!

Posted on Jul 08, 2009

  • 278 Answers

SOURCE: I replaced the slave cylinder on my 91 G.M.C.

Yes, get a pro-bleeder. They are around $ 75-$90 but well worth it.

Posted on Oct 15, 2009

  • 645 Answers

SOURCE: Having trouble bleeding the clutch on a 89 K1500.

try pumping the fork at the clutch slave with a large screw driver. make the fluid go backwards. Do not open the bleeder. I did this with a camero and it worked. hope this helps.

Posted on Jun 28, 2010

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