Heavy Duty Use Of The Vehicle - Jeep Grand Cherokee 2017 Owner's Manual

450 SERVICING AND MAINTENANCE
Mileage or time passed (which-
ever comes first)
Or Years:
Or Kilometers:
Flush and replace the engine coolant
at 10 years or 150,000 miles
(240,000 km) whichever comes first.
Change transfer case fluid.
Inspect and replace PCV valve if
necessary.
** The spark plug change interval is mileage based only,
yearly intervals do not apply.
WARNING!
• You can be badly injured working on or around a
motor vehicle. Do only service work for which you
have the knowledge and the right equipment. If you
have any doubt about your ability to perform a
service job, take your vehicle to a competent me-
chanic.
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(Continued)
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WARNING! (Continued)
• Failure to properly inspect and maintain your vehicle
could result in a component malfunction and effect
vehicle handling and performance. This could cause
an accident.

Heavy Duty Use Of The Vehicle

Change engine oil at 4,000 miles (6,500 km) if the vehicle is
operated in a dusty and off road environment or is
operated predominately at idle or only very low engine
RPM's. This type of vehicle use is considered Severe Duty.
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