how to reset proportioning valve on 1998 GMC Sonoma

replaced brake lines and have no pressure to rear brakes

by in Reading, PA on August 12, 2013
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2 answers 1 comment
ANSWER by , August 12, 2013
gravity bleed it first then stomp on brake pedal to see if you get valve to move
ANSWER by , August 12, 2013
best way is with a scan tools on auto bleed
COMMENT by , August 12, 2013
You are absolutely correct Greg.