Page 487 of 599
MAINTAINING YOUR VEHICLE
CONTENTS
ENGINE COMPARTMENT — 5.7L ..........487
ENGINE COMPARTMENT — 6.4L ..........488
ONBOARD DIAGNOSTIC SYSTEM (OBD II) . . .489
▫ Loose Fuel Filler Cap Message ............489
EMISSIONS INSPECTION AND MAINTENANCE
PROGRAMS ......................... .490
REPLACEMENT PARTS ..................491
DEALER SERVICE ..................... .492
MAINTENANCE PROCEDURES ...........492
▫ Engine Oil ......................... .493▫
Engine Oil Filter ..................... .496
▫ Engine Air Cleaner Filter ................496
▫ Accessory Drive Belt Inspection ...........500
▫ Maintenance-Free Battery ...............502
▫ Air Conditioner Maintenance .............503
▫ Front Prop Shaft Lubrication — Four-Wheel
Drive Models ....................... .504
▫ Body Lubrication .....................505
▫ Windshield Wiper Blades ...............505
▫ Adding Washer Fluid ..................510
7
Page 495 of 599

CAUTION!(Continued)
•Your vehicle has been built with improved fluids
that protect the performance and durability of your
vehicle and also allow extended maintenance inter-
vals. Do not use chemical flushes in these compo-
nents as the chemicals can damage your engine,
transmission, power steering or air conditioning.
Such damage is not covered by the New Vehicle
Limited Warranty. If a flush is needed because of
component malfunction, use only the specified
fluid for the flushing procedure.
Engine Oil
Checking Oil Level
To assure proper lubrication of your vehicle’s engine, the
engine oil must be maintained at the correct level. Check
the oil level at regular intervals, such as every fuel stop. The best time to check the engine oil level is about five
minutes after a fully warmed up engine is shut off.
Checking the oil while the vehicle is on level ground will
improve the accuracy of the oil level readings. Always
maintain the oil level within the SAFE zone on the
dipstick. Adding one quart of oil when the reading is at
the bottom of the SAFE zone will result in a reading at the
top of the safe zone on these engines.
CAUTION!
Overfilling or underfilling the crankcase will cause
oil aeration or loss of oil pressure. This could damage
your engine.7
MAINTAINING YOUR VEHICLE 493
Page 529 of 599

4. Fully apply the parking brake and press the brake.
5. Place the shift lever momentarily into each gear posi-tion (allowing time for the transmission to fully en-
gage in each position), ending with the transmission in
PARK.
6. Wipe the area around the dipstick clean to prevent dirt from entering the transmission.
7. Remove the dipstick, wipe it clean and reinsert it until seated.
8. Remove the dipstick again and note the fluid level on both sides. The fluid level reading is only valid if there
is a solid coating of oil on both sides of the dipstick.
Note that the holes in the dipstick will be full of fluid
if the actual level is at or above the hole. The fluid level
should be between the “HOT” (upper) reference holes
on the dipstick at normal operating temperature. If the
fluid level is low, add fluid through the dipstick tube to bring it to the proper level.
Do not overfill.Use
ONLY the specified fluid (see Fluids, Lubricants, and
Genuine Parts for fluid specifications). After adding
any quantity of oil through the dipstick tube, wait a
minimum of two minutes for the oil to fully drain into
the transmission before rechecking the fluid level.
NOTE: If it is necessary to check the transmission below
the operating temperature, the fluid level should be
between the two “COLD” (lower) holes on the dipstick
with the fluid at 60-70°F / 16-21°C for 66RFE transmis-
sion, or 68-86°F / 20-30°C for AS66RC transmission. Only
use the COLD region of the dipstick as a rough reference
when setting the fluid level after a transmission service
or fluid change. Re-check the fluid level, and adjust as
required, once the transmission reaches normal operating
temperature.
7
MAINTAINING YOUR VEHICLE 527
Page 581 of 599

Auto Down Power Windows..................44
Automatic Door Locks ......................37
Automatic Headlights ..................... .151
Automatic High Beams .....................153
Automatic Temperature Control (ATC) ..........301
Automatic Transmission ....................524
Adding Fluid ......................... .527
Fluid and Filter Changes ..................528
Fluid Level Check ...................... .526
Fluid Type ........................... .524
Shifting ............................. .336
Special Additives ...................... .525
Axle Fluid ............................. .523
Axle Lubrication ......................... .523
Battery ................................ .502
Keyless Transmitter Replacement (RKE) ........27
Belts, Seat ...............................110
Body Builders Guide ........................6 Body Mechanism Lubrication
.................505
B-Pillar Location ......................... .389
Brake Control System, Electronic ..............371
Brake Fluid ............................ .521
Brake System ........................... .370
Anti-Lock (ABS) ....................... .371
Fluid Check .......................... .521
Master Cylinder ....................... .521
Parking ............................. .367
Warning Light ........................ .203
Brake/Transmission Interlock .................336
Bulb Replacement ........................ .547
Bulbs, Light .............................112
Cab Top Clearance Lights ...................552
Capacities, Antifreeze (Engine Coolant) ..........554
Capacities, Fluid ......................... .554
Caps, Filler Oil (Engine) .......................... .495
10
INDEX 579
Page 585 of 599

Overheating.......................... .460
Engine Oil Viscosity ...................... .495
Enhanced Accident Response Feature ............70
Entry System, Illuminated ....................22
Ethanol ............................... .422
Event Data Recorder ........................74
Exhaust Gas Caution ...................... .109
Exhaust System .......................... .109
Exterior Lighting ......................... .151
Exterior Lights ...........................112
Filters Air Cleaner .......................... .496
Engine Fuel .......................... .555
Engine Oil ........................... .496
Engine Oil Disposal .....................496
Flashers Turn Signal ............................112
Flat Tire Stowage ........................ .472Flooded Engine Starting
....................331
Fluid, Brake ............................ .558
Fluid Capacities ......................... .554
Fluid Leaks .............................112
Fluid Level Checks Automatic Transmission ..................526
Brake ............................... .521
Power Steering ........................ .366
Fluids, Lubricants and Genuine Parts ...........555
Fog Lights ............................. .155
Four-Way Hazard Flasher ...................460
Four Wheel Drive ........................ .351
Freeing A Stuck Vehicle .....................477
Front Axle (Differential) .....................523
Fuel .................................. .421
Adding ............................. .426
Additives ............................ .424
Clean Air ............................ .422
Ethanol ............................. .422
10
INDEX 583