LaCrosse V8-5.3L (2008)
Vacuum Brake Booster: Service and Repair
Power Vacuum Brake Booster Replacement (LS4)
Tools Required
J 22805-B Brake Booster Holder
Removal Procedure
1. Remove the upper intake manifold sight shield. Refer to Upper Intake Manifold Sight Shield Replacement (See: Engine, Cooling and
Exhaust/Engine/Intake Manifold/Service and Repair).
2. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine
Performance Checks/Air Cleaner Housing/Service and Repair).
3. Remove the brake pressure modulator valve (BPMV) bracket. Refer to Brake Pressure Modulator Valve Bracket Replacement (See: Antilock
Brakes / Traction Control Systems/Hydraulic Control Assembly - Antilock Brakes/Service and Repair/Brake Pressure Modulator Valve Bracket
Replacement).
4. Remove the exhaust crossover pipe.
5. Disconnect the vacuum power brake booster check valve and hose assembly (1).
6. Disconnect the vacuum power brake booster vacuum sensor electrical connector.
7. Remove the left side instrument panel insulator panel. Refer to Instrument Panel Insulator Panel Replacement - Left Side (See: Body and
Frame/Interior Moulding / Trim/Dashboard / Instrument Panel/Service and Repair).