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Home >> GMC >> 2024 >> Acadia AT4 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Brakes >> Repair Instructions >> Brake and Accelerator Pedal Assembly Replacement >> Removal Procedure

Removal Procedure

WARNING:

The battery must be disconnected to prevent the brake master cylinder from pressurizing the hydraulic system during its automated self diagnostic tests that can possibly occur when a door is opened or the key transmitter is activated. Failure to follow this precaution may cause personal injury.

  1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
  2. Oil Filler Cap - Remove
  3. GM6382158Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Cover (1) - Remove

  4. GM6382159Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    To avoid small parts like bolts or retainers fallen into the engine, install the oil filler cap.

    Oil Filler Cap (1) - Install

  5. GM6396380Courtesy of GENERAL MOTORS COMPANY

    Positive Crankcase Ventilation Fresh Air Tube (1) @ Air Cleaner Outlet Duct - Disconnect - Plastic Collar Quick Connect Fitting Service

  6. GM6405033Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Outlet Duct Front Clamp (1) - Loosen

  7. Air Cleaner Outlet Duct Clamp (5) - Loosen
  8. Air Cleaner Outlet Duct Bolt (2) - Remove [2x]
  9. Air Cleaner Outlet Duct Nut (3) - Remove
  10. Air Cleaner Outlet Duct (4) - Remove
  11. GM6400274Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Outlet Duct Rear Clamp (1) - Loosen

  12. Turbocharger Outlet Duct Connector (2) - Remove
  13. GM6383148Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Radiator Surge Tank Bolt (1) - Remove

  14. Without opening the cooling system position the radiator surge tank (2) aside.
  15. GM5168152Courtesy of GENERAL MOTORS COMPANY

    Disconnect the electrical connector. (1)

  16. NOTE:

    Label the brake pipes to ensure they are re-installed in the correct ports of the brake master cylinder.

  17. Brake Pipe Fitting (2) - Remove [4x]
  18. Plug the brake master cylinder ports and the brake pipes to stop fluid loss and contamination.
  19. GM5168150Courtesy of GENERAL MOTORS COMPANY

    Disconnect the electrical connector. (1)

  20. Brake Master Cylinder Bracket Nut (2) - Remove
  21. GM5168146Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Brake Master Cylinder Bracket Nut (1) - Remove [2x]

  22. With the aid of an assistant, hold the brake master cylinder away from the dash panel.
  23. GM4285082Courtesy of GENERAL MOTORS COMPANY

    Brake Pedal Retainer (1) - Release

  24. NOTE:

    Pull the brake pedal rearward to release.

  25. Brake Pedal (2) - Release
  26. GM6396042Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Insert a long, thin tool through the power brake booster pass-through from the engine compartment to remove the brake pedal retainer.

    Brake Pedal Retainer (1) - Remove and DISCARD

  27. GM5527510Courtesy of GENERAL MOTORS COMPANY

    Remove the brake master cylinder (1) from the vehicle.

  28. GM6389550Courtesy of GENERAL MOTORS COMPANY

    Brake Master Cylinder Adapter Bolt (1) - Remove [2x]

  29. Brake Master Cylinder Adapter (2) - Remove
  30. GM5169840Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) @ Brake Pedal Position Sensor - Disconnect

  31. Electrical Connector @ Accelerator Pedal Position Sensor - Disconnect
  32. Wiring Harness Retainer @ Brake and Accelerator Pedal Assembly - Remove
  33. GM4285094Courtesy of GENERAL MOTORS COMPANY

    Brake Pedal Bracket Bolt (1) - Remove

  34. GM5169842Courtesy of GENERAL MOTORS COMPANY

    Brake Pedal Bracket Bolt (1) - Remove [2x]

  35. Brake and Accelerator Pedal Assembly - Remove
  36. GM4292567Courtesy of GENERAL MOTORS COMPANY

    Accelerator Pedal Fastener (1) - Remove [3x]

  37. Accelerator Pedal (2) - Remove
  38. Transfer components as necessary.