Question about 1995 Chevrolet K2500

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I have a 1975 chevyvan 30 motorhome. The brake warning light came on on the dash. Checked fluid and it was low so added fluid. When stopped I can pump the brakes up firm but when motor running the pedal slowly goes down and the warning light comes back on. Seems to do it in reverse more than drive. What would cause this?

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If I were you I would pull a rear wheel and check the rear brake adjustment,if the rear brakes are out of ajustment you will use an abnormal amount of brake fluid to actuate the brakes and eventually you will push the pistons out of your wheel cylinders. This will cause your break equilization valve to stick and you will have no rear breaks at all. If your rear breaks are in adjustment then check the back of your master cyl. for leaks,and your break power booster for vacume leak. If that does not seem to be the problem, bleed the brakes starting at hte furthest wheel from the master cyl. this info should help unless you have a leaking break line,or some other leak.

Posted on Nov 06, 2008

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Air in the lines, or a leakey line or caliper, do you see any fluid leaking on the rims? or under the car? if not they prolly just need to be bled.

Posted on Jul 25, 2008

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Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

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