LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2004 >> Century Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 124 (Hydraulic Brake System) >> Repair Instructions >> Vacuum Brake Booster Replacement (3.8L) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  2. Remove the left instrument panel insulator. Refer to Closeout/Insulator Panel Replacement - Left in Instrument Panel, Gages, and Console.
  3. Remove the retaining clip and disconnect the brake booster pushrod from the brake pedal.
  4. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (L26) or Fuel Injector Sight Shield Replacement (L32) in Engine Mechanical - 3.8L.
    5. Fig 1: View Of Fuel Injector Sight Shield
    GM370383Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the brake fluid level sensor electrical connector from the brake fluid level sensor.
    6. IMPORTANT: It is not necessary to disconnect the brake pipes from the master cylinder to the BPMV.
  6. Remove the 2 master cylinder retaining nuts and position the master cylinder aside.
  7. Disconnect the vacuum brake booster check valve from the brake booster. Position aside the vacuum hose and the check valve as an assembly.
  8. Rotate the engine forward for service access. Refer to Rotating the Engine for Service Access in Engine Mechanical - 3.8L.
  9. Remove the EGR valve wiring harness heat shield.
    10. Fig 2: View Of EGR Valve Wiring Harness Heat Shield
    GM190554Courtesy of GENERAL MOTORS CORP.
  10. Remove the EGR valve. Refer to Exhaust Gas Recirculation (EGR) Valve Replacement in Engine Controls - 3.8L.
  11. Remove the transmission fluid filler tube bracket retainer and position the filler tube aside. Refer to Fluid Filler Tube Replacement in Automatic Transaxle - 4T65-E.
  12. Remove the brake pressure modulator valve. Refer to Brake Pressure Modulator Valve (BPMV) Bracket Replacement in Anti-lock Brake System.
  13. Attach the J 22805-B  to the booster using the master cylinder retaining nuts. See Special Tools and Equipment .
  14. Unlock the booster from the front of the cowl.

    Use a flat bladed tool to depress the brake booster locking tab (1) out of the cowl mounting flange, while turning the booster counterclockwise with a ratchet on the J 22805-B  (2). See Special Tools and Equipment .

    15. Fig 3: Locking/Unlocking Booster To Cowl
    GM739251Courtesy of GENERAL MOTORS CORP.
  15. Remove the vacuum brake booster.
  16. Remove the J 22805-B  (2) from the booster. See Special Tools and Equipment .
scientia non olet · About LEMON Manuals