GM Service Manual Online
For 1990-2009 cars only

Tools Required

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


    Object Number: 479659  Size: SH
  1. Remove the rear disc brake rotor (1). Refer to Rear Brake Rotor Replacement in Disc Brakes.

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

  4. Object Number: 177201  Size: SH
  5. Position the J 21177-A over the shoe and lining at the widest point.
  6. Turn the adjuster nut until the shoe and lining just contacts the J 21177-A .
  7. Repeat steps two through five for the rotor on the opposite side.
  8. Install the rear disc brake rotor (1). Refer to Rear Brake Rotor Replacement in Disc Brakes.