At times, we need to remember to go back to basic, old-fashioned procedures to solve an issue. This was the case on a GMC pickup in which a technician couldn’t get the brakes bled after replacing the lines.
2000 GMC Sierra 2500 5.3L
Diagnostic Steps Performed/Parts Replaced
All lines were rusted out and were replaced. All four caliper bleeder screws were also removed and replaced. Couldn’t get a good bleed on this system without being able to do the onboard auto bleed procedure (bad module). Tried to vacuum bleed with no success, and tried to bleed with old standby pump pedal and hold and open bleeders, but have not had any of the wheels let fluid out.
Best Answer from Community Member
Open the bleeders one at a time and have someone slowly push the pedal down. When the pedal is all the way down, tighten the bleeder and do it again until you get all fluid. Repeat this step for all wheels. Be patient, it will take some time. This method has always worked for me. Patience is the key.
Amount of air in system with ABS not working.
Used manual bleeding method. Took over an hour bleeding the brakes to get all of the air out.
Courtesy of Mitchell 1 SureTrack Real Fix.