2010 Cadillac STS Owner's Manual - Page 494

First Engine Oil Change After Every 64 000 km/40,000 Miles . First Engine Oil Change After Every 160 000 km/100,000 Miles . 3.6L (Code V) V6 Engine Only: Engine air cleaner filter replacement. See Engine Air Cleaner/Filter on page 6‑23. Automatic transmission fluid and filter change (normal service). See Automatic Transmission Fluid on page 6‑25. All‐wheel drive only: Transfer case fluid change (normal service). Check vent hose at transfer case for kinks and proper installation. Check to be sure vent hose is unobstructed, clear, and free of debris. Spark plug replacement. An Emission Control Service. First Engine Oil Change After Every 80 000 km/50,000 Miles . . 4.6L (Code A) V8 Engine Only: Engine air cleaner filter replacement. See Engine Air Cleaner/Filter on page 6‑23. Automatic transmission fluid and filter change (severe service) for vehicles mainly driven in heavy city traffic in hot weather, in hilly or mountainous terrain, when frequently towing a trailer, or used for taxi, police, or delivery service. See Automatic Transmission Fluid on page 6‑25. All‐wheel drive only: Transfer case fluid change (severe service) for vehicles mainly driven when frequently towing a trailer, or used for taxi, police, or delivery service. Check vent hose at transfer case for kinks and proper installation. Check to be sure vent hose is unobstructed, clear, and free of debris. . . First Engine Oil Change After Every 240 000 km/150,000 Miles . . Engine cooling system drain, flush, and refill, cooling system and cap pressure check, and cleaning of outside of radiator and air conditioning condenser (or every 5 years, whichever occurs first). See Engine Coolant on page 6‑27. An Emission Control Service. Engine accessory drive belt inspection for fraying, excessive cracks, or obvious damage and replacement, if needed. An Emission Control Service. . 7-6