2010 Hummer H3 Owner's Manual - Page 369

Service and Maintenance . 11-5 Exhaust system and nearby heat shields inspection for loose or damaged components. Accelerator pedal check for damage, high effort, or binding. Replace if needed. . . First Engine Oil Change After Every 40 000 km/25,000 Miles . Fuel system inspection for damage or leaks. First Engine Oil Change After Every 80 000 km/50,000 Miles . Engine air cleaner filter replacement. See Engine Air Cleaner/Filter on page 10‑17. Automatic transmission fluid change (severe service) for vehicles mainly driven in heavy city traffic in hot weather, in hilly or mountainous terrain, when frequently towing a trailer, or used for taxi, police, or delivery service. See Automatic Transmission Fluid on page 10‑12. . Four‐wheel drive only: Transfer case fluid change. Check vent hose at transfer case for kinks and proper installation. Check to be sure vent hose is unobstructed, clear, and free of debris. During any maintenance, if a power washer is used to clean mud and dirt from the underbody, care should be taken to not directly spray the transfer case output seals. High pressure water can overcome the seals and contaminate the transfer case fluid. Contaminated fluid will decrease the life of the transfer case and should be replaced. . Rear axle fluid change (normal service). See Rear Axle on page 10‑29. Spark plug replacement and spark plug wires inspection. An Emission Control Service. . First Engine Oil Change After Every 240 000 km/150,000 Miles . Engine cooling system drain, flush, and refill, cooling system and cap pressure check, and cleaning of outside of radiator and air conditioning condenser (or every 5 years, whichever occurs first). See Cooling System on page 10‑18. An Emission Control Service. Engine accessory drive belt inspection for fraying, excessive cracks, or obvious damage and replacement, if needed. An Emission Control Service. First Engine Oil Change After Every 160 000 km/100,000 Miles . . Automatic transmission fluid change (normal service). See Automatic Transmission Fluid on page 10‑12.