Buick Century 2003 Owner's Manual page 127

4. Disconnect the windshield washer pump hose from
the fender rail and air inlet grille.
5. Remove the hood weather-strip from the
passenger's side of the vehicle (peel back halfway
to center).
6. Remove the three air inlet grille retainers.
7. Remove the air inlet grille.
8. Replace the old air filter by pulling up on its tab. For
the type of filter to use, see Normal Maintenance
Replacement Parts on page 5-95 .
9. Install a new passenger compartment air filter.
Make sure it slides under the compartment
retainers.
10. Reverse steps 1 through 7.
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