Park Brake Adjustment

Tools Required

J 21177-A Drum-to-Brake Shoe Clearance Gage. See Special Tools .

CAUTION: Refer to Brake Dust Caution in Cautions and Notices.

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

Fig 1: Measuring Inside Of Rotor

Courtesy of GENERAL MOTORS CORP.

Set the J 21177-A so that it contacts the inside diameter of the rotor. See Special Tools .

Fig 2: Adjusting Parking Brake Shoes Using Special Tool

Courtesy of GENERAL MOTORS CORP.

Position the J 21177-A over the shoe and the lining at the widest point. See Special Tools .
Turn the adjuster nut until the lining just contacts the J 21177-A . See Special Tools .
Repeat steps 1-3 for the opposite side.
The clearance between the park brake shoe and the rotor is 0.6604 mm (0.026 in).