2010 Cadillac STS Owner's Manual - Page 379

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 6‑13 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 80 000 km (50,000 mile) interval. See Scheduled Maintenance on page 7‑3 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 6-23