GM Service Manual Online
For 1990-2009 cars only

Important: Do not allow the A/C compressor to operate during this procedure.

  1. Start the engine.
  2. Set the blower to the highest speed setting.
  3. Set the temperature to the maximum heat setting.
  4. Remove the A/C system air filters. Refer to Passenger Compartment Air Filter Replacement .
  5. Turn the engine OFF after 10 minutes.
  6. Shake the deodorizer spray can.
  7. Install the extension tube into the nozzle of the can.
  8. Start the engine.
  9. Set the blower to the highest speed setting.
  10. Insert the extension tube into the filter opening.
  11. Spray short bursts, dispensing the contents of the can over a 2-3 minute period.
  12. Turn the engine OFF.
  13. After 3-5 minutes, start the engine.
  14. Set the blower to the highest speed setting.
  15. Operate the blower at this setting for 15-20 minutes in order to dry the evaporator.
  16. Install the A/C system air filters. Refer to Passenger Compartment Air Filter Replacement .