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Home >> Chevrolet >> 2018 >> Volt Premier >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Brakes >> Repair Instructions >> Power Brake Master Cylinder Booster Assembly Replacement >> Removal Procedure

Removal Procedure

CAUTION:

Do not lift or carry the electric brake booster by the input rod, electrical connectors or master cylinder reservoir. Failure to follow these steps may damage the electric brake booster.

    CAUTION:

    If there is no brake fluid in the master cylinder, remove one of the brake booster fuses before applying the brake pedal. Failure to do so may damage the electric brake booster.

  1. Remove one of the electric brake booster fuses from the engine compartment fuse block.
  2. Dash Upper Extension Panel Opening Cover Replacement - Remove
  3. GM4168637Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) @ Power Brake Booster (2) - Disconnect

  4. Electrical Connector (3) @ Power Brake Booster (2) - Disconnect
  5. GM4084596Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (2) @ Brake Fluid Level Sensor (1) - Disconnect

  6. GM4091185Courtesy of GENERAL MOTORS COMPANY

    Clip (2) @ Brake Master Cylinder Reservoir (3) - Unclip [2x]

  7. Clip (4) @ Brake Master Cylinder Reservoir - Unclip
  8. Body Wiring Harness (1) @ Brake Master Cylinder Reservoir - Remove
  9. GM4084518Courtesy of GENERAL MOTORS COMPANY

    Clip (2) @ Radiator Surge Tank (1) - Remove

  10. NOTE:

    Do NOT disconnect the engine coolant hoses.

  11. Slide the radiator surge tank forward and lift to remove.
  12. Fig 1: Identifying Brake Master Cylinder And Brake Pressure Modulator Valve Hose/Pipe Components
    GM4168638Courtesy of GENERAL MOTORS COMPANY

    Brake Master Cylinder Reservoir Hose (2) @ Brake Master Cylinder Reservoir (1) - Disconnect

  13. Brake Pressure Modulator Valve Secondary Pipe Fitting (7) @ Brake Master Cylinder (8) - Remove
  14. Brake Pressure Modulator Valve Secondary Pipe (6) @ Brake Master Cylinder - Remove
  15. Brake Pressure Modulator Valve Primary Pipe Fitting (4) @ Brake Master Cylinder - Remove
  16. Brake Pressure Modulator Valve Primary Pipe (5) @ Brake Master Cylinder - Remove
  17. Remove the master cylinder without removing the master cylinder reservoir. Brake Master Cylinder Replacement 
  18. GM4168635Courtesy of GENERAL MOTORS COMPANY

    Bolt (2) @ Power Brake Booster (1) - Loosen [2x]

  19. Brake Pedal Position Sensor Replacement - Remove
  20. GM4171512Courtesy of GENERAL MOTORS COMPANY

    Disconnect the brake pedal push rod (1) from the brake pedal (2). Press the 2 tabs of the click fit connector (3) together and pull the brake pedal to facilitate the removal.

  21. GM4091509Courtesy of GENERAL MOTORS COMPANY

    Remove and DISCARD the click fit connector (1) from the brake pedal (2).

  22. NOTE:

    Protect the windshield edge before removing the component.

  23. Power Brake Booster @ Vehicle - Remove
  24. GM4168633Courtesy of GENERAL MOTORS COMPANY

    Remove and DISCARD the power brake booster gasket (1).

  25. Remove the power brake booster heat shield. (2)