Cadillac 2009 Escalade EXT Owner's Manual page 404

Replacing the Engine Air Cleaner/Filter
2. Loosen the four screws on the cover of the housing
and lift up the cover.
6-20
1. Locate the air
cleaner/filter assembly.
See Engine
Compartment Overview
on page 6-14.
3. Remove the engine air cleaner/filter from the
housing. Care should be taken to dislodge as
little dirt as possible.
4. Clean the engine air cleaner/filter sealing surfaces
and the housing.
5. Inspect or replace the engine air cleaner/filter.
6. Reinstall the cover and tighten the screws.