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