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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 250 (Hydraulic Brake System) >> Repair Instructions >> Power Brake Booster Vacuum Check Valve and Hose Replacement (LF4) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Apply the brake pedal several times until the pedal becomes firm to deplete the power vacuum brake booster vacuum reserve.
  2. Remove Front End Sheet Metal Diagonal Brace - Left Side. Refer to Front End Sheet Metal Diagonal Brace Replacement - Left Side (ATS-V)
  3. Remove Charge Air Bypass Valve - Left Side. Refer to Charge Air Bypass Valve Replacement - Left Side
  4. Remove Charge Air Cooler Inlet Pipe - Left Side. Refer to Charge Air Cooler Inlet Pipe Replacement - Left Side
  5. Disconnect the power brake booster vacuum sensor electrical connector.
  6. Fig 1: Power Brake Booster Vacuum Sensor
    GM4014488Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The charge air cooler inlet air hose not shown for clarity.

  7. Remove Power Brake Booster Vacuum Sensor (1)
  8. Fig 2: Power Brake Booster Vacuum Hose Quick Connect
    GM4014765Courtesy of GENERAL MOTORS COMPANY
  9. Disconnect Power Brake Booster Vacuum Hose Quick Connect (1) @ Intake Manifold
  10. Fig 3: Retainer And Clip
    GM4015324Courtesy of GENERAL MOTORS COMPANY
  11. Release Retainer and Clip (1)
  12. Remove Air Cleaner Outlet Front Duct. Refer to Air Cleaner Outlet Front Duct Replacement (LF4)
  13. Fig 4: Retainer And Clip
    GM4015327Courtesy of GENERAL MOTORS COMPANY
  14. Release Retainer and Clip (1)
  15. Fig 5: Power Brake Booster Vacuum Hose Quick Connect
    GM4015331Courtesy of GENERAL MOTORS COMPANY
  16. Disconnect Power Brake Booster Vacuum Hose Quick Connect (1) @ Vacuum Pump
  17. Disconnect Vacuum Hose (2) @ Engine Mount
  18. Remove Power Brake Booster Vacuum Hose Assembly