2007 Silverado 2500 HD classic power steering air bleed hydro boost. Front wheels off the ground, fluid level on full cold and cap secured. Place rags around the power steering reservoir and underneath truck to catch possible spillage. Ignition on, engine not running, turn steering wheel all the way left and all the way right that counts as one. Do this five times and on the fifth steering stop push on brake pedal three times. This counts as one cycle. It can take up to 50-90 cycles to clear the air out of system. Check fluid level frequently and fill if needed and secure reservoir cap. Side note with the wheels lifted at the front you can get a false fluid level indication with the incline. Check fluid level when u have finished and the front wheels are back on the ground before turning vehicle on for results.

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