Envoy 2WD V8-5.3L (2007)
Vacuum Brake Booster: Service and Repair
Vacuum Brake Booster Replacement
Removal Procedure
1. Apply the parking brake.
2. Remove the master cylinder. Refer to Master Cylinder Replacement.
3. Disconnect the vacuum hose from the vacuum booster and from the engine.
4. Remove the left closeout/insulator panel. Refer to Instrument Panel Insulator Panel Replacement - Left Side.
5. Remove the pushrod retainer (3) from the brake pedal pin (4).
6. Remove the stop lamp switch (1) and the pushrod (2) from the brake pedal pin (4).
