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Home >> GMC >> 2022 >> Hummer EV >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Brakes >> Repair Instructions >> Brake Master Cylinder Replacement - With Power Brake Booster and Electronic Brake Control Module >> Installation Procedure

Installation Procedure

  1. GM5835312Courtesy of GENERAL MOTORS COMPANY

    Brake Master Cylinder Gasket (2) - Install NEW

  2. Maneuver the brake master cylinder (1) into the vehicle.
  3. GM5835308Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

    Brake Master Cylinder Adapter Nut (1) - Install and tighten - Fastener Specifications 

  4. GM5835311Courtesy of GENERAL MOTORS COMPANY

    Rear Brake Front Pipe Nut (1) - Install and tighten [4x] - Fastener Specifications 

  5. GM5835316Courtesy of GENERAL MOTORS COMPANY

    Lubricate the brake master cylinder reservoir seals (2) with GM approved brake fluid from a clean, sealed brake fluid container. Adhesives, Fluids, Lubricants, and Sealers 

  6. Brake Master Cylinder Reservoir Seal (2) - Install NEW [3x]
  7. Brake Master Cylinder Reservoir (1) - Install
  8. GM5835315Courtesy of GENERAL MOTORS COMPANY

    Brake Master Cylinder Bolt (1) - Install and tighten [2x] - Fastener Specifications 

  9. Electrical Connector @ Brake Fluid Level Indicator Switch - Connect
  10. Electrical Connector @ Brake System Control Module - Connect
  11. GM5835307Courtesy of GENERAL MOTORS COMPANY

    Brake Pedal Nut (2) - Install and tighten [4x] - Fastener Specifications 

  12. If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:
    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Remove loose debris from internal and external threads using compressed air.
    4. Apply liquid thread locking adhesive in a strip along half of the length of the external threads, starting at the tip, just prior to installation. Adhesives, Fluids, Lubricants, and Sealers
  13. Brake Pedal Push Rod Bolt (1) - Install and tighten - Fastener Specifications 
  14. Bleed the brake system. Hydraulic Brake System Bleeding 
  15. Check for brake system leaks.
  16. GM5787987Courtesy of GENERAL MOTORS COMPANY

    Front Compartment Side Sight Shield (1) - Install

  17. GM5787985Courtesy of GENERAL MOTORS COMPANY

    Front Compartment Side Sight Shield Retainer (1) - Install [3x]

  18. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection