GM Service Manual Online
For 1990-2009 cars only

Tools Required

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


    Object Number: 177200  Size: SH
  1. Remove the rear disc brake rotor (1). Refer to Rear Brake Rotor Replacement in Disc Brakes.
  2. Turn the rotor slowly while pulling the rotor away from the hub.
  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 (1) 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.