GM Service Manual Online
For 1990-2009 cars only
  1. Clean the weather-strips with solvent.
  2. Clean the contact surfaces with solvent.
  3. Apply powder or chalk in an unbroken line to the contact surface of the weather-strip around the perimeter of the following surfaces:
  4. • The rear compartment lid
    • The door
    • The door window
    • The hood
  5. Ensure that the surrounding areas are free of chalk or powder.
  6. Important: Do not slam the panel.

  7. Close the panel completely.
  8. Inspect the applied line on the weather-strip.
  9. The weather-strip will be marred where contact is good. A corresponding imprint will be on the mating surfaces.

  10. Gaps or irregularities in the powder or chalk line indicate a poor seal.