Buick 2003 Century Owner's Manual page 135

For information on how often to change the passenger
compartment air filter, see Scheduled Maintenance
on page 6-5.
To change the passenger compartment air filter, use the
following steps:
1.
2.
3.
4.
5.
6.
Turn off the ignition when the windshield wipers are
in the up position.
Raise the hood.
Disconnect the windshield washer pump hose from
the fender rail and air inlet grille.
Remove the hood weatherstrip from the passenger's
side of the vehicle (peel back halfway to center).
Remove the three air inlet grille retainers.
Remove the air inlet grille.
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 5-95.
9. Reinstall the air inlet grille.
10. Reinstall the air inlet grille retainers.
11. Reattach the hood weatherstip.
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.
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