GM Service Manual Online
For 1990-2009 cars only

Parking Brake Adjustment Disc

Important: Perform the Park Brake System Check prior to performing this procedure in order to ensure that all of the park brake system components are operating properly.

  1. Apply the parking brake until three clicks are heard.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Use your hands in order to rotate both of the rear wheels.
  4. • If both of the rear the wheels exhibit drag or do not rotate, the park brake cable is adjusted properly, go to Step 8.
    • If either of the rear wheels rotate freely, go to Step 4.

    Important: The brake linings must be adjusted prior to adjusting the park brake cable.

  5. Adjust the applicable brake lining as necessary.
  6. For vehicles with drum brakes. Refer to Drum Brake Adjustment in Drum Brakes.

  7. Object Number: 474301  Size: SH
  8. Tighten the park brake equalizer nut until both rear wheels exhibit drag or do not rotate.
  9. Release the parking brake.
  10. Verify that both rear wheels rotate freely.
  11. For vehicles with rear disc, verify that the park brake actuator levers have returned to their stops (full release position). If the park brake levers do not return to their stops (full release position), adjust the park brake shoe and lining. Refer to Park Brake Adjustment .
  12. Lower the vehicle.

Parking Brake Adjustment Drum

  1. Apply and fully release the parking brake six times. Verify that the park brake pedal releases completely.
  2. Turn ON the ignition. Verify that the BRAKE indicator lamp is off.
  3. If the BRAKE lamp is on, then check the following:

    • Ensure that the parking brake is in release mode and fully returned to the stop.
    • Check the front park brake cable slack. Remove the slack in the front park brake cable by pulling downward on the cable.
  4. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  5. Remove the rear wheels and tires. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  6. Adjust the drum brakes. Refer to Drum Brake Adjustment in Drum Brakes.
  7. Install the rear wheels and tires. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.

  8. Object Number: 177170  Size: SH
  9. Adjust the park brake system by turning the nut at the equalizer (2) while spinning both rear wheels. When either rear wheel starts to drag, back off the nut one full turn.
  10. Lower the vehicle to curb height.
  11. Apply the park brake five clicks and check the forward rotation of the rear wheels. With five clicks applied it should be very difficult to turn by hand should require 30 40 N m torque , measured with a torque wrench on a wheel stud . With less then five clicks applied, wheels should turn easily by hand. Readjust the equalizer nut as needed to obtain this condition.
  12. Release the parking brake. Verify that the wheels rotate freely.
  13. Lower the vehicle.