GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 Envoy - 4WD 🢒 Brakes 🢒 Park Brake 🢒 Parking Brake Actuator Replacement

Caution: Refer to Brake Dust Caution in the Preface section.

Removal Procedure

    Object Number: 777351 Size: SH
  1. Disable the park brake automatic adjuster. Refer to Parking Brake Cable Adjuster Disabling .
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  3. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
  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. Object Number: 790034 Size: SH
  6. Remove the rear brake caliper and mounting bracket assembly. Refer to Rear Brake Caliper Bracket Replacement .

    7. Object Number: 748573 Size: SH
  7. Remove the rear brake rotor.

    8. Object Number: 788488 Size: SH
  8. Remove the axle shaft. Refer to Rear Axle Shaft Replacement .

    9. Object Number: 790168 Size: SH
  9. Remove the park brake shoe. Refer to Parking Brake Shoe Replacement .

    10. Object Number: 370684 Size: SH
  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

    Object Number: 370684 Size: SH
  1. Install the park brake actuator lever housing to the backing plate.
  2. Perform the following procedure before installing the backing plate bolts:
    3. 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 the Preface section.

  3. Install the backing plate bolts.

    4. Tighten
    Tighten the backing plate bolts to 135 N·m (100 lb ft).


    Object Number: 790168 Size: SH
  4. Install the park brake shoe. Refer to Parking Brake Shoe Replacement .

    5. Object Number: 788488 Size: SH
  5. Install the axle shaft. Refer to Rear Axle Shaft Replacement .
  6. Adjust the park brake shoe. Refer to Park Brake Adjustment .

    7. Object Number: 748573 Size: SH
  7. Install the rear brake rotor.

    8. Object Number: 777351 Size: SH
  8. Install the rear park brake cable to the park brake actuator lever.

    9. Object Number: 777470 Size: SH
  9. Install the park brake cable to the mounting bracket, ensuring the locking tabs are secured.

    10. Object Number: 790034 Size: SH
  10. Install the rear brake caliper and mounting bracket assembly. Refer to Rear Brake Caliper Bracket Replacement .
  11. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
  12. Lower the vehicle. Refer to Lifting and Jacking the Vehicle .
  13. Enable the park brake automatic adjuster. Refer to Parking Brake Cable Adjuster Enabling .