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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1122 (Hydraulic Brake System) >> Repair Instructions >> Power Vacuum Brake Booster Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the left side instrument panel insulator panel. Refer to Instrument Panel Insulator Replacement - Left Side .
  2. Without disconnecting the steering column from the intermediate shaft, lower the steering column assembly and support the column. Refer to Steering Column Replacement .
    3. Fig 1: Identifying Brake Pedal Position Sensor
    GM1919797Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the brake pedal position sensor (1) electrical connector.
    4. Fig 2: Identifying Vacuum Brake Booster Pushrod Retaining Clip
    GM1919805Courtesy of GENERAL MOTORS CORP.
  4. Remove the vacuum brake booster pushrod retaining clip (1).
    5. Fig 3: View Of Vacuum Brake Booster Pushrod
    GM1919807Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the vacuum brake booster pushrod (1) from the brake pedal pivot.
    6. Fig 4: View Of Vacuum Brake Booster Pushrod Bushing
    GM1919812Courtesy of GENERAL MOTORS CORP.
  6. Remove the vacuum brake booster pushrod bushing (1).
    7. Fig 5: Identifying Vacuum Brake Booster Pushrod Wave Washer
    GM1919814Courtesy of GENERAL MOTORS CORP.
  7. Remove the vacuum brake booster pushrod wave washer (1).
    8. Fig 6: Removing/Installing Master Cylinder Nuts
    GM1895892Courtesy of GENERAL MOTORS CORP.
  8. Remove the cross vehicle brace, if equipped. Refer to Cross Vehicle Brace Replacement .
  9. Disconnect the master cylinder fluid level sensor electrical connector.
  10. Remove the master cylinder nuts (1).
  11. Without disconnecting the brake pipes, position aside the master cylinder and support with heavy mechanics wire or equivalent.
  12. Remove the air inlet grille panel. Refer to Air Inlet Grille Panel Replacement .
  13. Without disconnecting the hoses, remove and position aside the surge tank. Refer to Radiator Surge Tank Replacement .
    14. Fig 7: Identifying Vacuum Brake Booster Check Valve & Hose Assembly
    GM1919873Courtesy of GENERAL MOTORS CORP.
  14. Disconnect the vacuum brake booster check valve and hose assembly (1) and position aside.
    15. Fig 8: Identifying J 22805-B & Locking Tab
    GM1919788Courtesy of GENERAL MOTORS CORP.
  15. Install the J 22805-B  (1) to the vacuum brake booster and secure with the master cylinder nuts. See Special Tools .
  16. Using a flat-bladed tool, depress the locking tab (2) toward the cowl.
    17. Fig 9: View Of Vacuum Brake Booster
    GM1919792Courtesy of GENERAL MOTORS CORP.
  17. Rotate the J 22805-B  and vacuum brake booster (1) counter clockwise to release the vacuum brake booster from the bracket. See Special Tools .
    18. IMPORTANT: Do not attempt to remove the vacuum brake booster completely. The vacuum brake booster pushrod retaining clip must be released prior to booster removal.
  18. Carefully pull the vacuum booster forward slightly and support the vacuum booster to access the booster pushrod retaining clip.
    19. Fig 10: View Of Brake Booster Pushrod & Retaining Clip
    GM1919795Courtesy of GENERAL MOTORS CORP.
  19. Compress the vacuum brake booster foam filter to access the vacuum brake booster retaining clip.
  20. Disconnect the brake booster pushrod (1) from the booster by releasing the retaining clip (2).
  21. Remove the vacuum brake booster from the vehicle.
  22. Remove the vacuum brake booster pushrod through the dust boot from inside of the vehicle, if necessary.
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