2003 Buick Regal Owner's Manual - Page 132

To change the passenger compartment air filter, use the following steps: 1. Turn off the ignition when the windshield wipers are in the up position. 2. Raise the hood. 3. Disconnect the windshield washer pump hose from the fender rail and air inlet grille. 4. Remove the hood weatherstrip from the passenger's side of the vehicle (peel back halfway to center). 7. Remove the passenger compartment air filter. 8. Then replace the old air filter with the new one. For the type of filter to use, see Normal Maintenance Replacement Parts on page 5-96. 9. Reinstall the air inlet grille. 5. Remove the three air inlet grille retainers. 6. Remove the air inlet grille. 10. Reinstall the air inlet grille retainers. 11. Reattach the hood weatherstrip. 12. Reconnect the windshield washer pump hose to the fender rail and air inlet grille. 13. Close the hood. 14. Return the windshield wipers to the park position. 3-27