2003 Buick Park Avenue Owner's Manual - Page 270

To check or replace the engine air cleaner/filter, do the following: 1. Remove the wing nuts on the engine air cleanedfilter housing cover. 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 housing cover by pulling upward and rearward. 5-21