Parking Brake Actuator: Service and Repair

Parking Brake Actuator Replacement

Removal Procedure

1. Raise and support the vehicle. Refer to Vehicle Lifting.
2. Remove the rear tire and wheel assemblies.




3. Remove the rear wheel hub and bearing assembly.
4. Rotate the park brake adjuster nut until the bolt is in the closed position.
5. Remove the park brake shoe hold down spring.




6. Remove the park brake shoe assembly (1) by grasping the shoe and spreading slightly while pulling the shoe from the actuator assembly.




7. Using a flat-bladed tool remove the adjusting nut (10).
8. Using a flat-bladed tool remove the tappet (2).
9. Remove the adjustment pawl (9).
10. Move the hand brake lever (5) to the apply position and remove the hand brake pushrod (4).
11. Pull the hand brake out and remove.
12. Using a flat-bladed tool, move the actuator retaining tab outward and remove the abutment plate (3) from the dust shield (8).
13. Remove the dust cover.

Installation Procedure




1. Apply a small amount silicone grease to positions (1,2) use GM P/N 18010909 (Canadian P/N 10953488) or equivalent. Do not apply grease to the bolt threads (3).
2. Install the dust cover (6) to the abutment plate (3).




3. Using a flat-bladed tool, move the actuator retaining tab outward and Install the abutment plate (3) to the dust shield (8). Ensure that the abutment plate (3) is seated and secure.
4. Install the hand brake lever (5) to the abutment plate.
5. Install the adjustment pawl (9) to the abutment plate.
6. Install the hand brake pushrod (4) to the abutment plate.
7. Install the tappet (2) to the abutment plate.
8. Install the adjusting nut (10) to the abutment plate.




9. Install the park brake shoe assembly by grasping the shoe and spreading slightly while pulling the shoe over the actuator assembly.




10. Install the park brake shoe hold down spring.
11. Adjust the park brake.
12. Install the rear wheel hub and bearing assembly.
13. Install the rear tire and wheel assembly.
14. Lower the vehicle.