GM Service Manual Online
For 1990-2009 cars only

Parking Brake Adjustment Without Dual Rear Wheel

Special Tools

J 21177-A Drum-to-Brake Shoe Clearance Gage

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

    Note: The park brake shoes must be adjusted before the park brake pedal is adjusted.


    Object Number: 177200  Size: SH
  1. Set the J 21177-A so that it contacts the inside diameter of the rotor.

  2. Object Number: 177201  Size: SH
  3. Position the J 21177-A over the shoe and the lining at the widest point.
  4. Turn the adjuster nut until the lining just contacts the J 21177-A .
  5. Repeat steps 1-3 for the opposite side.
  6. The clearance between the park brake shoe and the rotor is 0.6604 mm (0.026 in).

Parking Brake Adjustment With Dual Rear Wheel

Special Tools

J-21177-A Drum-to-Brake Shoe Clearance Gage

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


    Object Number: 177200  Size: SH
  1. Set the J-21177-A Drum-to-Brake Shoe Clearance Gage so it lightly contacts the parking brake shoe friction surface of the brake rotor.

  2. Object Number: 177201  Size: SH
  3. Position the J-21177-A Drum-to-Brake Shoe Clearance Gage over the parking brake shoes (1) at the widest point.
  4. Rotate the parking brake adjuster until the parking brake shoes just contact the J-21177-A Drum-to-Brake Shoe Clearance Gage .
  5. Using a feeler gage, set the parking brake shoe clearance to  0.62 mm (0.024 in.)
  6. Repeat steps 1-4 for the opposite parking brake assembly.