Black plate (5,1)Cadillac DTS Owner Manual - 2011Additional Required ServicesEvery 12 000 km/7,500 Miles. Rotate tires. Tires should be rotated every12 000 km/7,500 miles. See Tire Inspection andRotation on page 6‑65.At Each Fuel Stop. Engine oil level check. See Engine Oil onpage 6‑15.. Engine coolant level check. See Engine Coolanton page 6‑26.. Windshield washer fluid level check. SeeWindshield Washer Fluid on page 6‑32.Once a Month. Tire inflation pressures check. See Inflation - TirePressure on page 6‑57.. Tire wear inspection. See Tire Inspection andRotation on page 6‑65.. Sunroof track and seal inspection, if equipped. SeeSunroof on page 3‑56.Once a Year. Starter switch check. See Owner Checks andServices on page 7‑7.. Automatic transmission shiftlock control functioncheck. See Owner Checks and Services onpage 7‑7.. Ignition transmission lock check. See OwnerChecks and Services on page 7‑7.. Parking brake and automatic transmission P (Park)mechanism check. See Owner Checks andServices on page 7‑7.. Accelerator pedal check for damage, high effort,or binding. Replace if needed.. Underbody flushing service.First Engine Oil Change After Every40 000 km/25,000 Miles. Passenger compartment air filter replacement (orevery 24 months, whichever occurs first). Morefrequent replacement may be needed if youdrive in areas with heavy traffic, areas withpoor air quality, or areas with high dust levels.Replacement may also be needed if you noticereduced air flow, windows fogging up, or odors.Your dealer can help you determine when it is theright time to replace the filter.7-5