Page 349 of 455
MAINTAINING YOUR VEHICLE
CONTENTS
Engine Compartment—5.7L...............352
Onboard Diagnostic System (OBD II).........353
Emissions Inspection And Maintenance
Programs............................353
Dealer Service.........................355
Replacement Parts......................356
Maintenance Procedures..................356
▫Engine Oil..........................356
▫Engine Oil Filter......................360▫Drive Belts—Check Condition And
Tensioner...........................360
▫Spark Plugs.........................361
▫Engine Air Cleaner Filter................361
▫Engine Fuel Filter.....................362
▫Catalytic Converter....................362
▫Emission-Related Components............364
▫Maintenance Free Battery................364
▫Air Conditioner Maintenance.............365
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Page 361 of 455

Belts should be inspected for evidence of cuts, cracks,
glazing or frayed cords and replaced if there is indication
of damage which could result in belt failure. Low gen-
erator belt tension can cause battery failure.
Also check belt routing to make sure there is no interfer-
ence between the belts and other engine components.
Spark Plugs
Spark plugs must fire properly to assure engine perfor-
mance and emission control. New plugs should be in-
stalled 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. For proper type of replacement spark
plugs, refer to the“Vehicle Emission Control Informa-
tion”label in the engine compartment.
Engine Air Cleaner Filter
Under normal driving conditions, replace the air filter at
the intervals shown on Schedule“A”. If, however, you
drive the vehicle frequently under dusty or severe con-
ditions, the filter element should be inspected periodi-
cally and replaced if necessary at the intervals shown on
Schedule“B”.
MAINTAINING YOUR VEHICLE 361
7
Page 415 of 455
Miles 18,000 21,000 24,000 27,000 30,000
(Kilometers) (29 000) (34 000) (38 000) (43 000) (48 000)
Change engine oil and engine oil filter, or at 3
months, whichever comes first.X XXX
Lubricate Drive Shaft Fitting. X X X X X
Rotate tires. X X X
Lubricate tie rod end links. X X X X X
Change rear axle fluid.X
Change front axle fluid.X
Check transfer case fluid level.X
Inspect brake linings. X
Inspect engine air cleaner filter, replace if neces-
sary.X
Replace spark plugs.X
Inspect PCV valve, replace as necessary.**X
SCHEDULE“B”415
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Page 417 of 455
Miles 48,000 51,000 54,000 57,000 60,000
(Kilometers) (77 000) (82 000) (86 000) (91 000) (96 000)
Change engine oil and engine oil filter, or at 3
months, whichever comes first.X X XXX
Lubricate Drive Shaft Fitting. X X X X X
Rotate tires. X X X
Lubricate tie rod end links. X X X X X
Drain and refill transfer case fluid.X
Change rear axle fluid.X
Change front axle fluid.X
Change 6-spd manual transmission (G-56) fluid. X
Inspect brake linings. X X
Inspect engine air cleaner filter, replace if neces-
sary.X
Replace spark plugs.X
Replace ignition cables.X
Inspect PCV valve, replace as necessary.**X
SCHEDULE“B”417
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Page 420 of 455
Miles 78,000 81,000 84,000 87,000 90,000
(Kilometers) (125 000) (130 000) (134 000) (139 000) (144 000)
Change engine oil and engine oil filter, or at 3
months, whichever comes first.X X XXX
Lubricate Drive Shaft Fitting. X X X X X
Rotate tires. X X X
Lubricate tie rod end links. X X X X X
Change rear axle fluid.X
Change front axle fluid.X
Check transfer case fluid level.X
Inspect brake linings. X
Inspect engine air cleaner filter, replace if neces-
sary.X
Replace spark plugs.X
Inspect PCV valve, replace as necessary.**X
Inspect auto tension drive belt and replace if re-
quired.X
420 SCHEDULE“B”
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Page 422 of 455
Miles 105,000 108,000 111,000 114,000 117,000 120,000
(Kilometers) (168 000) (173 000) (178 000) (182 000) (187 000) (192 000)
Change engine oil and engine oil filter, or at 3
months, whichever comes first.X X XXXX
Lubricate Drive Shaft Fitting. X XXXXX
Rotate tires. X X X
Lubricate tie rod end links. X XXXXX
Drain and refill transfer case fluid.X
Change rear axle fluid. X X
Change front axle fluid. X X
Change 6-spd manual transmission (G-56)
fluid.X
Inspect brake linings. X X
Inspect engine air cleaner filter, replace if
necessary.XX
Replace spark plugs.X
Replace ignition cables.X
422 SCHEDULE“B”
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Page 424 of 455
Schedule“A”
Miles 6,000 12,000 18,000 24,000 30,000
(Kilometers) (10 000) (19 000) (29 000) (38 000) (48 000)
[Months] [6] [12] [18] [24] [30]
Change engine oil and engine oil filter. X X X X X
Lubricate Front Prop Shaft fitting. X X X X v
Rotate tires. X X X X X
Check transfer case fluid level.X
Lubricate tie rod end links. X X X X X
Inspect brake linings. X
Inspect engine air cleaner filter, replace if neces-
sary.X
Replace spark plugs.X
424 SCHEDULE“A”
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Page 425 of 455
Miles 36,000 42,000 48,000 54,000 60,000 66,000
(Kilometers) (58 000) (67 000) (77 000) (84 000) (96 000) (106 000)
[Months] [36] [42] [48] [54] [60] [66]
Change engine oil and engine oil filter. X XXXXX
Lubricate Front Prop Shaft fitting. X XXXXX
Rotate tires. X XXXXX
Check transfer case fluid level. X
Lubricate tie rod end links. X XXXXX
Flush and replace engine coolant at 60
months, regardless of mileage.X
Inspect brake linings. X X
Inspect engine air cleaner filter, replace if
necessary.X
Replace spark plugs.X
Inspect PCV valve, replace as necessary.**X
Replace ignition cables.X
SCHEDULE“A”425
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