Additional Required ServicesThe following services should be performed at the first maintenance service (I or II) after the indicated miles(kilometers) shown for each item.Service 25,000(41 500) 50,000(83 000) 75,000(125 000) 100,000(166 000) 125,000(207 500) 150,000(240 000)Inspect fuel system for damage or leaks. • • • • • •Inspect exhaust system for loose ordamaged components. • • • • • •Replace engine air cleaner filter. SeeEngine Air Cleaner/Filter on page 5-22.An Emission Control Service. • • • • • •For vehicles used for trailer towing:Change transfer case fluid. • • •Change automatic transmission fluid andfilter (severe service).See footnote (h). • • •Change automatic transmission fluid andfilter (normal service). •Replace spark plugs.An EmissionControl Service. •Engine cooling system service (or every5 years, whichever occurs first).An Emission Control Service. Seefootnote (i).•Inspect engine accessory drive belt.AnEmission Control Service. •6-6