1999 - 2006 (GMT800) Section for all discussion related to the 1999-2006 Chevrolet and GMC trucks.

Back Brake lines blew, Now they won't bleed

Old Dec 16, 2019 | 2:40 PM
  #11  
mountainmanjoe's Avatar
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So explain to me how bleeding is different from braking.
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Old Dec 16, 2019 | 4:13 PM
  #12  
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the abs pump doesn't cycle the valves during normal braking. if air got introduced into the abs pump during service, normal bleeding or braking won't get it out.

when i do these, I use the p-value tool to allow fluid flow to the back, bleed it.... remove the tool and then do an abs bleed with the scan tool.
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Old Dec 16, 2019 | 8:25 PM
  #13  
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Originally Posted by tech2
the abs pump doesn't cycle the valves during normal braking. if air got introduced into the abs pump during service, normal bleeding or braking won't get it out.

when i do these, I use the p-value tool to allow fluid flow to the back, bleed it.... remove the tool and then do an abs bleed with the scan tool.

Exactly, this is what I was talking about, I just couldnt explain it right.
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