2011 Chevrolet Impala Owner's Manual - Page 208

8-6 Climate Controls 5. Lift the air inlet grille and disconnect the washer hose at the quick-connect. 6. Remove the air inlet grille. 7. Remove the water deflector plate. 8. Remove the old passenger compartment air filter. 9. Reverse the steps to install the new air filter. For best climate control system performance, reinstall the air filter. For the type of filter to use, see Maintenance Replacement Parts on page 11‑8. To change the passenger compartment air filter: 1. Turn off the ignition when the windshield wipers are in the up position. 2. Raise the vehicle hood. 3. Pull back the hood weatherstrip from the passenger side of the vehicle halfway to center. 4. Remove the air inlet grille retainers.