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How to reset proportioning valve

(1998 GMC Sonoma)
in Reading, PA on August 12, 2013
replaced brake lines and have no pressure to rear brakes
Displaying 2 answers & 1 comments
Popular Answer
of Greg's Orange Auto on August 12, 2013
best way is with a scan tools on auto bleed
on August 12, 2013
You are absolutely correct Greg.
on August 12, 2013
gravity bleed it first then stomp on brake pedal to see if you get valve to move
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