2009 Cadillac DTS Owner's Manual - Page 414

Additional Required Services (cont'd) Service and Miles (Kilometers) Replace spark plugs. An Emission Control Service. Except Professional Vehicle: Engine cooling system service (or every five years, whichever occurs first). An Emission Control Service. See footnote (j). Professional Vehicle Only: Engine cooling system service (or every five years, whichever occurs first). An Emission Control Service. See footnote (j). Inspect engine accessory drive belt. An Emission Control Service. See footnote (l). 25,000 (40 000) 50,000 (80 000) 75,000 (120 000) 100,000 (160 000) • 125,000 (200 000) 150,000 (240 000) • • • • 6-6