MAINTAINING YOUR VEHICLE
CONTENTS
Engine Compartment — 6.1L..............296
Onboard Diagnostic System — OBD II........297
▫Loose Fuel Filler Cap..................297
Emissions Inspection And Maintenance
Programs............................298
Replacement Parts......................299
Dealer Service.........................300
Maintenance Procedures..................300
▫Engine Oil..........................301▫Engine Oil Filter......................303
▫
Drive Belts — Check Condition And Tension...303
▫Spark Plugs.........................304
▫Engine Air Cleaner Filter................304
▫Fuel Filter..........................304
▫Catalytic Converter....................305
▫Maintenance-Free Battery................307
▫Air Conditioner Maintenance.............309
▫A/C Air Filter — If Equipped............310
7
Spark Plugs
Spark plugs must fire properly to assure engine perfor-
mance and emissions control. New plugs should be
installed at the specified mileage. The entire set should be
replaced if there is any malfunction due to a faulty spark
plug. Malfunctioning spark plugs can damage the cata-
lytic converter. Refer to “Fluids, Lubricants, and Genuine
Parts” in this section for the proper type of spark plug for
use in your vehicle.
Engine Air Cleaner Filter
Refer to the Maintenance Schedule in Section 8 for engine
air cleaner filter maintenance intervals.
NOTE:Be sure to follow the “dusty or off-road condi-
tions” maintenance interval if applicable.
WARNING!
The air induction system (air cleaner, hoses, etc.) can
provide a measure of protection in the case of engine
backfire. Do not remove the air induction system (air
cleaner, hoses, etc.) unless such removal is necessary
for repair or maintenance. Make sure that no one is
near the engine compartment before starting the
vehicle with the air induction system (air cleaner,
hoses, etc.) removed. Failure to do so can result in
serious personal injury.
Fuel Filter
A plugged fuel filter can cause stalling, limit the speed at
which a vehicle can be driven or cause hard starting.
Should an excessive amount of dirt accumulate in the
fuel tank, filter replacement may be necessary. See your
authorized dealer for service.
304 MAINTAINING YOUR VEHICLE
Perform Maintenance Every(Where time and mileage
are listed, follow the interval that occurs first.)
Maintenance Items Miles Kilometers or Months
Replace the engine air cleaner filter. 30,000 50 000 30
Change the rear axle fluid if using your vehicle for
any of the following: police, taxi, fleet, off-road, or fre-
quent trailer towing.48,000 80 000 48
Change the automatic transmission fluid and filter if
using your vehicle for any of the following: police,
taxi, fleet, or frequent trailer towing.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 spark plugs.102,000 170 000 102
Change the automatic transmission fluid and filter. 120,000 200 000 120
† This maintenance is recommended by the manufacturer
to the owner, but is not required to maintain emissions
warranty.
MAINTENANCE SCHEDULES 349
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