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Dave Nova
Dave Nova, GMC Technician
Category: GMC
Satisfied Customers: 19451
Experience:  ASE Master Certification. GM World Class Certification
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GMC Suburban K2500 4x4: recently replaced rear brakes on my

Customer Question

recently replaced rear brakes on my 89 suburban.cant get any pressure to pedal. gravity fed and still no pressure . replaced both rear cylanders.no pressure??????
Submitted: 1 year ago.
Category: GMC
Expert:  Dave Nova replied 1 year ago.
Is there any pedal at all? Does the BRAKE warning light stay on?
Customer: replied 1 year ago.
little pedal on end .brake fluid flows through screws.
Expert:  Dave Nova replied 1 year ago.
What commonly happens on these trucks is the piston in the brake proportioning valve becomes stuck. If you have a little pedal, put the vehicle on the ground and drive it in reverse. Jab the brakes hard. Do this a few times, this may get the piston re-centered in the proportioning valve and allow fluid to flow to the rear brakes again.