Rear Drum Shoe Adjustment
- Raise vehicle and remove wheels and drums. Check to make certain that parking brake cable and linkage, including levers on rear secondary shoes, are free. Measure brake drum inside diameter using inside caliper portion of tool (J-21177).
Courtesy of GENERAL MOTORS COMPANY
- Adjust brake shoes to dimension obtained on outside caliper portion of tool (J-21177). Check brake fluid level in both master cylinder reservoirs. Add fluid if necessary. Adjust parking brake.
- Install drums and wheel. Tighten wheel mounting nuts. Lower vehicle. Drive car alternately forward and backward, applying brakes moderately in each direction.