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1991 GMC Vandura 2500 Question: trouble bleeding back brakes



Visitor, Sharpsville, PA, November 14, 2010, 14:28

The rear brake line blew out half way back. I drove the van for 2 or 3 short trips with just front brakes. I replaced the brake line and am trying to bleed the back brakes, but when I have someone hold down the brake pedal while I open the bleeder valve, nothing happens. Is there some component that needs reset to allow fluid into the back system again? Also, the brake light on the dash is on.

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  • Answer #1

    mastertech6371 November 14, 2010, 18:27

    air bound. the light is on showing hydaulic difference. when you get a peadl, it will go out. you may have lost the master cylinder since the pedal went to the floor. it may have ripped the seals in the master.


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  • Answer #2

    delane 72 garage and body shop November 14, 2010, 19:09

    you will have to blead with computer because of abs system you could have mest up mastercylinder bleed at mastercylinder take a line wrench pump up brake pedal hold down them bleed each line on mastercylinder unless you no witch line go to rear

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