GM Service Manual Online
For 1990-2009 cars only
  1. Inspect for a partially open air inlet valve.
  2. Ensure that the air inlet valve closes properly in all modes except the MAX air conditioning mode. Perform repairs as necessary.

  3. Inspect all of the side door seals for the following conditions. Repair or replace faulty seals as necessary.
  4. • Damaged seals
    • Missing seals