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Perform Maintenance Every (Where time and mileage
are listed, follow the interval that occurs first.)
Maintenance Items Miles Kilometers or Months
Change the transfer case fluid if using your vehicle for
any of the following: police, taxi, fleet, off-road or fre-
quent trailer towing.
60,000 100 000 60
Change the manual transmission fluid if using your
vehicle for any of the following: trailer towing, snow-
plowing, heavy loading, taxi, police, delivery service
(commercial service), off-road, desert operation or
more then 50% of your driving is at sustained high
speeds during hot weather, above 90F° (32C°).
60,000 100 000 60
Inspect and replace PCV valve if necessary. 90,000 150 000 90
Flush and replace the engine coolant. 102,000 170 000 60
Replace the ignition cables on 4.7L engines. 102,000 170 000 102
Replace the side row of spark plugs on 4.7L engines.
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102,000 170 000 102
MAINTENANCE SCHEDULES 393
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