GM Service Manual Online
For 1990-2009 cars only
  1. Remove the adjusting hole cover in the backing plate.
  2. Adjust the adjusting screw until the wheel can just be turned by hand. The brake drag should be equal at both wheels.
  3. Important:  The brakes should have no drag after the screw has been backed off about 15 notches. If a heavy drag is present, refer to Park Brake Cable Service/Adjustment in Parking Brake.

  4. Back off the adjusting screw 3 notches.
  5. Install an adjusting hole cover in the backing plate.
  6. Check the parking brake adjustment. Refer to Park Brake Cable Service/Adjustment in Parking Brake.