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Drum Brake Adjustment: Adjustment

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Locating Front Park Brake Adjusting Nut
    GM891317Courtesy of GENERAL MOTORS CORP.
  1. Ensure the park brake lever is in the fully released position.
  2. Release the park brake lever boot from the floor console by applying light pressure inward on the sides of the boot retainer.
  3. Pull the boot away from the console to expose the front park brake cable adjusting nut (1).
  4. Release the tension from the park brake cable system at the front cable adjusting nut.

    Using ONLY HAND TOOLS, loosen the adjusting nut completely to the end of the front cable threaded rod.

    5. Fig 2: View Of Drum-to-Brake Shoe Clearance Gage
    GM891757Courtesy of GENERAL MOTORS CORP.
  5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  6. Remove the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation .
  7. Remove the brake drums. Refer to Brake Drum Replacement .
  8. Position the J-21177-A:  Drum to Brake Shoe Clearance Gauge to widest point of the brake drum inside diameter.
  9. Firmly hand tighten the set screw on the J-21177-A:  Drum to Brake Shoe Clearance Gauge.
    10. Fig 3: Positioning J 21177-A Over Brake Shoe Assembly
    GM891758Courtesy of GENERAL MOTORS CORP.
  10. Remove the J-21177-A:  Drum to Brake Shoe Clearance Gauge from the brake drum and position it over the corresponding brake shoe assembly at its widest point.
  11. While holding the J-21177-A:  Drum to Brake Shoe Clearance Gauge in position, insert a 0.375 mm (0.015 in) feeler gauge between one side of the J-21177-A:  Drum to Brake Shoe Clearance Gauge, and the corresponding brake shoe lining.
  12. Rotate the brake shoe adjuster screw until the brake shoe linings contact the J-21177-A:  Drum to Brake Shoe Clearance Gauge, and the feeler gauge.

    Specification:  Brake shoe lining-to-drum clearance: 0.375 mm (0.015 in).

  13. Repeat the above steps for the opposite brake drum and brake shoe assembly.
  14. Install the brake drums. Refer to Brake Drum Replacement .
  15. Adjust the park brake. Refer to Parking Brake Adjustment (Disc) or Parking Brake Adjustment (Drum) .
  16. Install the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation .
  17. Lower the vehicle.
  18. Position the park brake lever boot to the floor console and press the boot retainer into place to secure.
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