2008 Cadillac STS Owner's Manual - Page 455

Additional Required Services (cont'd) Service and Miles (Kilometers) For all-wheel-drive vehicles used for trailer towing: Change transfer case fluid. Replace spark plugs. An Emission Control Service. Engine cooling system service (or every five years, whichever occurs first). An Emission Control Service. See footnote (j). 4.4L Supercharged Engine: Intercooler system service (or every five years, whichever occurs first). See footnote (l). Inspect engine accessory drive belt. An Emission Control Service. See footnote (n). If using DOT-4 brake fluid, change brake fluid at a regular maintenance service every two years. See footnote (i). 25,000 (40 000) 50,000 (80 000) • 75,000 (120 000) 100,000 (160 000) • • 125,000 (200 000) 150,000 (240 000) • • • • 6-7