2009 Cadillac STS-V Owner's Manual - Page 349

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 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 each 50,000 mile (80 000 km) interval. See Scheduled Maintenance on page 6-4 for more information. If you are driving in dusty/dirty conditions, inspect the filter at each engine oil change. 4.6L V8 Engine shown, 3.6L V6 Engine similar 5-23