2004 GMC Yukon Owner's Manual - Page 511

Additional Required Services The following services should be performed at the first maintenance service (I or II) after the indicated miles (kilometers) shown for each item. Additional Required Services Service and Miles (Kilometers) Inspect fuel system for damage or leaks. Inspect exhaust system for loose or damaged components. Vehicles without a filter restriction indicator: Replace engine air cleaner filter. See Engine Air Cleaner/Filter on page 5-23. An Emission Control Service. Change automatic transmission fluid and filter (severe service). See footnote (h). Change automatic transmission fluid and filter (normal service). Four-wheel drive: Change transfer case fluid. See footnote (g). • 25,000 (41 500) • • 50,000 (83 000) • • 75,000 (125 000) • • 100,000 (166 000) • • 125,000 (207 500) • • 150,000 (240 000) • • • • • • • • • • • • • • 6-7