i have a 87 suburban. the rear wheel cyclinder went out. we replaced it 3 times. still no brakes so we replaced the master cyclinder and rebleed the brakes. still no breaks. the fluid is getting to the rear wheels but it will not make the cyclinder expand. does anyone have any ideas of what can be wrong an how to fix it ? i really need my ride thanks.
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1990 GMC Suburban 1500
Question: rear brake problem
Answer #1patrick mannion from Greg Solow's Engine Room, July 07, 2010, 23:00Master
If you are concerned the problem is in the rear wheel cylinders or rear brakes, locate the brake flexible line going to the rear axle, put a rubber hose over both jaws of a pair of needle hose vise grips and gently press the jaws closed on the rear flex line. You have now eliminated the rear brakes the pedal should be "hard" if the problem is indeed in the rear brakes. If the pedal is still soft the problem is not i the rear brakes.
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Replygreasymonkey, July 08, 2010, 20:38Rookie
thanks for the tip i will try it tomorrow. thanks again