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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 477 (Hydraulic Brake System) >> Repair Instructions >> Power Brake Booster Vacuum Check Valve and Hose Replacement >> Removal Procedure

Removal Procedure

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  1. Turn the ignition switch to the OFF position.
  2. Apply and release the brake pedal several times until the brake pedal becomes firm to depete the power vacuum brake booster vacuum reserve.
  3. Remove the upper intake manifold sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .
    4. Fig 1: Power Brake Booster Vacuum Sensor
    GM2277629Courtesy of GENERAL MOTORS COMPANY
  4. Disconnect the electrical connector from the vacuum sensor (1).
  5. Remove the vacuum sensor with check valve and hose assembly from the power vacuum brake booster.
    6. Fig 2: Brake Booster Check Valve And Hose Assembly
    GM2277636Courtesy of GENERAL MOTORS COMPANY
  6. Release the clamp and remove the vacuum brake booster check valve and hose assembly (1).
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