Vacuum Brake Booster: Service and Repair

Vacuum Brake Booster Replacement

Removal Procedure
1. Remove the master cylinder.





2. Compress the hose clamp (3) and move the hose clamp away from the brake booster check valve fitting.
3. Hold the check valve fitting and twist the booster hose in order to separate the hose from the fitting.
4. Remove the left closeout panel.
5. Remove the left ventilation ducts.





6. Remove the push rod retaining clip (1).
7. Remove the washer (2).
8. Remove the push rod (3) from the brake pedal.
9. Remove the washer (4).





10. Remove the vacuum brake booster nuts (1,2,7,8) from the brake pedal bracket.
11. Pull the booster toward the engine.
12. Remove the booster from the vehicle.

Installation Procedure
1. Install the vacuum brake booster to the engine compartment.





2. Notice: Refer to Fastener Notice in Service Precautions.

Install the nuts (1,2,7,8) in order to retain the booster to the brake pedal bracket.
Tighten the nuts to 25 Nm (18 ft. lbs.).





3. Apply GM Vehicle Care Dri-Slide Lubricant, GM P/N 1052948, or the equivalent molybdenum disulfide lubricant, to the pivot point (5) of the push rod on the brake pedal.





4. Install the washer (4) to the brake pedal.
5. Install the push rod (3).
6. Install the washer (2).
7. Install the push rod retaining clip (1).
8. Install the left ventilation ducts.
9. Install the left closeout panel.
10. Install the booster hose to the booster check valve fitting.
11. Compress the hose clamp and move the hose clamp past the wider portion of the fitting. Release the hose clamp on the narrow portion of the fitting in order to retain the hose to the fitting.
12. Install the master cylinder.