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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1550 (Parking Brake System) >> Repair Instructions >> Park Brake Adjustment >> Tools Required

Tools Required

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

J 21177-A  Drum to Brake Shoe Clearance Gauge. See Special Tools and Equipment .

IMPORTANT: Park brake adjustment is not necessary after replacing the park brake lever or park brake cables. The park brake cables are tensioned automatically by cycling the park brake lever three times.
  1. Apply and fully release the parking brake three times.
  2. Verify that the parking brake lever releases completely.
  3. Turn ON the ignition. Verify that the red BRAKE warning indicator lamp is off.
  4. Turn OFF the ignition.
  5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  6. Remove the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
    7. Fig 1: Identifying Rear Brake Components
    GM177186Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not operate the park brake lever with the rear disc brake rotor removed.
  7. Remove the rear disc brake rotors. Refer to Brake Rotor Replacement - Rear in Disc Brakes.
    8. Fig 2: Measuring Inside Of Rotor
    GM177200Courtesy of GENERAL MOTORS CORP.
  8. Place the inside measurement contacts of theJ 21177-A  at the widest point of the drum portion of the brake rotor (1). See Special Tools and Equipment .
  9. Tighten the set screw on the tool in order to ensure the proper measurement when removing the tool from the drum.
    10. Fig 3: Adjusting Parking Brake Shoes Using Special Tool
    GM177201Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: If the gap between the adjuster nut and the adjuster screw exceeds 5 mm (0.25 in) during the adjustment procedure, the park brake shoe must be replaced.
  10. Position the outside measurement contacts of the J 21177-A  over the park brake shoe (1) at the widest point. See Special Tools and Equipment .
  11. Adjust the park brake shoe-to-drum clearance by rotating the adjustment nut on the park brake actuator.

    Specification:  0.38 mm (0.015 in)

  12. Install the rear brake rotors. Refer to Brake Rotor Replacement - Rear in Disc Brakes.
  13. Install the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  14. Apply and release the park brake lever three times.
  15. Apply the park brake lever. Inspect the rotation of the rear wheels:
    • The wheels should not rotate forward.
    • The wheels should drag or not rotate rearward.
  16. If the rear tire and wheel assemblies rotate forward or do not exhibit drag rearward, repeat the adjustment procedure.
  17. Release the parking lever. Verify that the wheels rotate freely
  18. Lower the vehicle
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