GM Service Manual Online
For 1990-2009 cars only

    Object Number: 306518  Size: SH
  1. Run the wiper arms to the mid-wipe position.
  2. Remove the wiper blades from the wiper arms. Refer to Windshield Wiper Blade Replacement .
  3. Attach a scale to the end of the wiper arm. Measure the force required in order to lift the wiper arm perpendicular to the windshield to a normal working height.
  4. Replace the wiper arm if the measurement is not within the specification. Refer to Windshield Wiper Arm Replacement .
  5. Tip Pressure
    8.3-10.1 Newtons (30-36 oz)

  6. Install the wiper blades on the wiper arms. Refer to Windshield Wiper Blade Replacement .