GM Service Manual Online
For 1990-2009 cars only

    Object Number: 219696  Size: SH
  1. Turn the adjustment nut on both parking brake self adjusters until both sets of parking brake shoes just contact the parking brake drum with no significant drag.
  2. Tighten the adjuster nut (1) on the parking brake lever shaft (2) until braking effort occurs while ensuring the wheels can still turn.
  3. Perform the following inspection:
  4. 3.1. Ensure the rear wheels still turn with the parking brake lever set on the 4th notch.
    3.2. Ensure the rear wheels are tight with the parking brake lever set on the 7th notch.
    3.3. Additionally, ensure the braking effort is equal at both rear wheels.
  5. The adjustment procedure is complete when the above inspections are correct.