2009 Buick Enclave Owner's Manual - Page 372

6-6 Maintenance Schedule Additional Required Services (cont'd) Service and Miles (Kilometers) 25,000 (40 000) 50,000 (80 000) • 75,000 (120 000) 100,000 (160 000 125,000 (200 000) 150,000 (240 000) • All-wheel-drive vehicles: Change transfer case fluid (severe service). See footnote (m). All-wheel-drive vehicles: Change transfer case fluid (normal service). Replace spark plugs and inspect spark plug wires. An Emission Control Service. Engine cooling system service (or every five years, whichever occurs first). An Emission Control Service. See footnote (i). Inspect engine accessory drive belt. An Emission Control Service. See footnote (k). • •