GM Service Manual Online
For 1990-2009 cars only

Tools Required

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

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

Important: 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).