Cadillac 2005 CTS - Manual (Page 302)

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 location.
When to Inspect the Engine
Air Cleaner/Filter
Inspect the air cleaner/filter at every oil change
and replace it at the first oil change after
25,000 miles (41 500 km).
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 engine air cleaner/filter,
do the following:
1. Remove the two screws located on the sides
of the cover.
2. Lift the cover off.
3. Inspect or replace the engine air cleaner/filter.
See Normal Maintenance Replacement Parts
on page 6-15 for the correct part number for
the filter.
4. Reinstall the cover by reversing Steps 1 and 2.
CTS shown, CTS-V similar
5-22