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Home >> GMC >> 2021 >> Yukon XL AT4 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Brakes >> Repair Instructions >> Brake Pedal Assembly Replacement >> Installation Procedure

Installation Procedure

  1. GM5549258Courtesy of GENERAL MOTORS COMPANY

    Brake Pedal (1) - Install

  2. GM5549260Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

    Brake Pedal Nut (1) - Install and tighten [ 5x ] - Fastener Specifications 

  3. GM5549261Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Tie Bar Bracket (2) - Install

  4. Instrument Panel Tie Bar Bracket Nut (1) - Install and tighten [ 2x ] - Fastener Specifications
  5. GM5607841Courtesy of GENERAL MOTORS COMPANY

    Brake Master Cylinder (2) - Install

  6. Brake Master Cylinder Adapter Nut (2) - Install and tighten - Fastener Specifications 
  7. GM5543167Courtesy of GENERAL MOTORS COMPANY

    Radiator Surge Tank (1) - Install

  8. GM5543163Courtesy of GENERAL MOTORS COMPANY

    Radiator Surge Tank Bolt (1) - Install and tighten - Fastener Specifications

  9. GM5549259Courtesy of GENERAL MOTORS COMPANY

    If a NEW threaded component is being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded component is reused, prepare the threaded component using the following steps:

    1. Remove any loose cured adhesive from the external threads of the component using a lint free cloth.
    2. Thread the cleaned component into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the component. Adhesives, Fluids, Lubricants, and Sealers 
    4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  10. Brake Pedal Push Rod Bolt (1) - Install and tighten - Fastener Specifications 
  11. GM5549257Courtesy of GENERAL MOTORS COMPANY

    Brake Pedal Position Sensor (2) - Install

  12. Brake Pedal Position Sensor Bolt (1) - Install and tighten - Fastener Specifications
  13. GM5549527Courtesy of GENERAL MOTORS COMPANY

    Wiring Harness Retainer (1) @ Brake Pedal - Install [ 2x ]

  14. Brake Pedal Position Sensor Electrical Connector (2) - Connect
  15. GM5568788Courtesy of GENERAL MOTORS COMPANY

    Body Control Module (1) - Install

  16. Secure the retaining tabs.
  17. Connect the electrical connectors.
  18. GM5002006Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    Upon installing the floor duct to the side of the HVAC case, it is necessary to verify duct opening is completely installed, surrounding the HVAC case outlet port. Failure to do so could result in the duct falling downward, with the potential to interfere with driver's legs and gas/brake pedal operation.

    Floor Front Air Outlet Duct - Left Side (1) - Install

  19. GM5002004Courtesy of GENERAL MOTORS COMPANY

    Floor Front Air Outlet Duct Bolt (1) - Install and tighten - Fastener Specifications

  20. GM5515685Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Lower Trim Panel Insulator (1) - Install

  21. GM5515684Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Lower Insulator Retainer (1) - Install [ 2x ]

  22. Calibrate the brake pedal position sensor. Brake Pedal Position Sensor Calibration