2005 Cadillac CTS-V Owner's Manual - Page 302

Engine Air Cleaner/Filter 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: CTS shown, CTS-V similar 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. 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. 5-22