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Parking Brake Adjustment

    WARNING:

    Refer to Brake Dust Warning .

    NOTE:

    Use ONLY HAND TOOLS whenever tightening or loosening the adjusting nut.

  1. Apply and fully release the park brake several times. Verify that the park brake lever releases completely.
  2. Turn ON the ignition. Verify the red BRAKE warning lamp is not illuminated.
  3. If the red BRAKE warning lamp is illuminated, verify the following:
    • The park brake lever is in the fully released position and against the stop.
    • There is no slack in the park brake cables.
  4. If the red BRAKE warning lamp remained illuminated and there were no other visible causes, refer to Symptoms - Hydraulic Brakes .
  5. Turn OFF the ignition.
  6. Release the park brake lever boot from the floor console by applying light pressure inward on the sides of the boot retainer, and pull the boot back.
    7. Fig 1: Front Park Brake Cable Adjusting Nut
    GM2308673Courtesy of GENERAL MOTORS COMPANY
  7. With the park brake lever in the released position, loosen the adjusting nut (1) enough to completely relieve tension on the front cable.
    8. CAUTION:

    Refer to Vehicle Lifting and Jacking Caution .

  8. Raise and support the vehicle. Raise the vehicle just enough to allow rear tire and wheel assembly removal and rear drum adjustment.
  9. Remove the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation .
  10. Adjust the rear drum brakes. Refer to Drum Brake Adjustment .
  11. Ensure there is no brake shoe drag after adjustment by rotating the brake drums. If drag exists, re-center the brake shoes and perform the brake shoe adjustment again.
  12. Raise the park brake lever 6 detent positions.
    13. Fig 2: Installing Park Brake Cable Adjusting Nut Until Projection Amount (A)
    GM2351407Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

  13. Install the park brake cable adjusting nut until the projection amount (A) of the adjusting rod reaches 21 mm from the adjusting nut.
  14. Attempt to rotate the rear brake drums. There should be no rotation forward or rearward.
  15. Fully release the park brake lever.
  16. Verify the park brake is released by rotating the rear brake drums. The drums should rotate freely and exhibit no brake shoe drag.
  17. If the drums do not rotate freely, repeat the park brake cable adjustment procedure.
  18. Raise the park brake lever 3 detent positions and attempt to rotate the rear brake drums:
    • One of the brake drums should not rotate forward or rearward.
    • The other brake drum should not rotate forward or rearward, or should require substantial effort to rotate.
  19. Raise the park brake lever one additional detent position and attempt to rotate the rear brake drums.
  20. Verify that the left and right brake drums cannot be rotated.
  21. Install the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation .
  22. Lower the vehicle.
  23. Position the park brake lever boot to the floor console and press the boot retainer into place to secure.
  24. Release the park brake lever.
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