Cadillac 2005 STS - Manual (Page 311)

Engine Air Cleaner/Filter
The engine air cleaner/filter is in the engine
compartment on the driver’s side of the vehicle, near
the front. See Engine Compartment Overview on
page 5-12 for more information on locating and
accessing the air cleaner/filter.
When to Inspect the Engine Air
Cleaner/Filter
Inspect the air cleaner/filter at the Maintenance II
intervals and replace it at the first oil change after
50,000 miles (83 000 km).
See Scheduled Maintenance on page 6-4 for more
informaiton. If you are driving in dusty/dirty conditions,
inspect the filter at each engine oil change.
How to Inspect the Engine Air
Cleaner/Filter
To inspect the air cleaner/filter remove the filter from the
vehicle and lightly shake the filter to release loose
dust and dirt. If the filter remains caked with dirt, a new
filter is required.
To inspect or replace the filter, do the following:
1. Remove the two screws located on the top
of the cover.
2. Disconnect the coolant recovery hose so that
it is not going across the top of the engine air
cleaner/filter.
3. Loosen the clamp and remove the duct from the
passenger’s side of the engine air cleaner/filter.
4. The two sides of the airbox are hinged at the
bottom. Open the airbox by pushing the top of
the airbox cover toward the engine.
4.6L V8 shown, 3.6L V6 similar
5-21