Parking Brake Actuator: Service and Repair

Parking Brake Actuator Replacement
Caution: Refer to Brake Dust Caution (Brake Dust Caution).

Removal Procedure




1. Disable the park brake automatic adjuster. Refer to Parking Brake Cable Adjuster Disabling (Parking Brake Cable Adjuster Disabling).
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (Service and Repair).
3. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation (Service and Repair).
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. Refer to Rear Brake Caliper Bracket Replacement (Rear Brake Caliper Bracket Replacement).




7. Remove the rear brake rotor.




8. Remove the axle shaft. Refer to Rear Axle Shaft Replacement (Service and Repair).




9. Remove the park brake shoe. Refer to Parking Brake Shoe Replacement (Service and Repair).




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:

1. Remove all traces of the original adhesive patch.
2. Clean the threads of the bolt with brake parts cleaner or the equivalent and allow to dry.
3. Apply threadlocker GM P/N 12345493 (Canadian P/N 10953488) to the threads of the bolt.

Notice: Refer to Fastener Notice (Fastener Notice).

3. Install the backing plate bolts.

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




4. Install the park brake shoe. Refer to Parking Brake Shoe Replacement (Service and Repair).




5. Install the axle shaft. Refer to Rear Axle Shaft Replacement (Service and Repair).
6. Adjust the park brake shoe. Refer to Park Brake Adjustment (Adjustments).




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. Refer to Rear Brake Caliper Bracket Replacement (Rear Brake Caliper Bracket Replacement).
11. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation (Service and Repair).
12. Lower the vehicle. Refer to Lifting and Jacking the Vehicle (Service and Repair).
13. Enable the park brake automatic adjuster. Refer to Parking Brake Cable Adjuster Enabling (Parking Brake Cable Adjuster Enabling).