Parking Brake Actuator: Service and Repair

Park Brake Actuator Replacement





Caution: Refer to Brake Dust Caution.

Removal Procedure
1. Disable the park brake automatic adjuster.
2. Raise the vehicle. Refer to Vehicle Lifting.
3. Remove the tire and wheel assembly.
4. Remove the park brake cable from the mounting bracket by depressing the locking tabs.
5. Remove the rear park brake cable from the park brake actuator lever.





6. Remove the rear brake caliper and mounting bracket assembly.





7. Remove the rear brake rotor.





8. Remove the axle shaft.





9. Remove the park brake shoe.





10. Remove the backing plate bolts.
11. Remove the park brake actuator lever housing from the backing plate.
12. Using denatured alcohol, clean the backing plate and parking brake actuator.
13. Using non-lubricated, filtered air, dry the backing plate.

Installation Procedure





1. Install the park brake actuator lever housing to the backing plate.
2. Perform the following procedure before installing the backing plate bolts.
2.1. Remove all traces of the original adhesive patch,
2.2. Clean the threads of the bolt with brake parts cleaner or the equivalent and allow to dry.
2.3. Apply Threadlocker GM P/N 12345493 (Canadian P/N 10953488) to the threads of the bolt.

Notice: Refer to Fastener Notice in Service Precautions.

3. Install the backing plate bolts.
Tighten the backing plate bolts to 135 Nm (100 ft. lbs.).





4. Install the park brake shoe.





5. Install the axle shaft.





6. Adjust the park brake shoe (1).





7. Install the rear brake rotor.





8. Install the rear park brake cable to the park brake actuator lever.





9. Install the park brake cable to the mounting bracket, ensuring the locking tabs are secured.





10. Install the rear brake caliper and mounting bracket assembly.
11. Install the tire and wheel assembly.
12. Lower the vehicle. Refer to Vehicle Lifting.
13. Enable the park brake automatic adjuster.