Buick 2001 Park Avenue - Manual (Page 281)

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2. Remove the air intake hose that snaps over the
throttle body by pulling the hose upward and away
from the throttle body. As you are detaching the
hose, remove the air cleaner housing cover by
pulling upward and rearward.
3. Check or replace the engine air cleaner/filter.
4. Reattach the air intake hose.
5. Reinstall the air cleaner housing cover.
Refer to the Maintenance Schedule to determine when to
replace the air filter.
See “Scheduled Maintenance Services” in the Index.