Page 687 of 806

CAUTION!
Towing this vehicle in violation of the above require-
ments can cause severe engine and/or transmission
damage. Damage from improper towing is not cov-
ered under the New Vehicle Limited Warranty.
Four-Wheel Drive Models
The manufacturer recommends towing with all wheels
OFFthe ground. Acceptable methods are to tow the
vehicle on a flatbed or with one end of vehicle raised and
the opposite end on a towing dolly.
If flatbed equipment is not available, and the transfer
case is operable, the vehicle may be towed (in the
forward direction, with ALLwheels on the ground), IF
the transfer case is in NEUTRAL (N) and the transmis-
sion is in PARK(for automatic transmissions) or in gear
(NOT in NEUTRAL, for manual transmissions). Refer to “Recreational Towing” in “Starting And Operating” for
further information and detailed instructions.
CAUTION!
•
Front or rear wheel lifts must not be used. Internal
damage to the transmission or transfer case will
occur if a front or rear wheel lift is used when
towing.
• Towing this vehicle in violation of the above re-
quirements can cause severe transmission and/or
transfer case damage. Damage from improper tow-
ing is not covered under the New Vehicle Limited
Warranty.
6
WHAT TO DO IN EMERGENCIES 685
Page 695 of 806

ONBOARD DIAGNOSTIC SYSTEM (OBD II)
Your vehicle is equipped with a sophisticated onboard
diagnostic system called OBD II. This system monitors
the performance of the emissions, engine, and automatic
transmission control systems. When these systems are
operating properly, your vehicle will provide excellent
performance and fuel economy, as well as engine emis-
sions well within current government regulations.
If any of these systems require service, the OBD II system
will turn on the “Malfunction Indicator Light (MIL).” It
will also store diagnostic codes and other information to
assist your service technician in making repairs. Al-
though your vehicle will usually be drivable and not
need towing, see your authorized dealer for service as
soon as possible.
CAUTION!
•Prolonged driving with the MIL on could cause
further damage to the emission control system. It
could also affect fuel economy and driveability.
The vehicle must be serviced before any emissions
tests can be performed.
• If the MIL is flashing, while the engine is running,
severe catalytic converter damage and power loss
will soon occur. Immediate service is required.
Loose Fuel Filler Cap Message
If the vehicle diagnostic system determines
that the fuel filler cap is loose, improperly
installed, or damaged, a loose gascap indicator
will display in the EVIC telltale display area.
Refer to “Electronic Vehicle Information Center (EVIC) in7
MAINTAINING YOUR VEHICLE 693
Page 710 of 806

Under normal operating conditions, the catalytic con-
verter will not require maintenance. However, it is im-
portant to keep the engine properly tuned to assure
proper catalyst operation and prevent possible catalyst
damage.
NOTE:Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you.
In unusual situations involving grossly malfunctioning
engine operation, a scorching odor may suggest severe
and abnormal catalyst overheating. If this occurs, stop
the vehicle, turn off the engine and allow it to cool.
Service, including a tune-up to manufacturer’s specifica-
tions, should be obtained immediately. To minimize the possibility of catalytic converter dam-
age:
•
Do not shut off the engine or interrupt the ignition,
when the transmission is in gear and the vehicle is in
motion.
• Do not try to start the engine by pushing or towing the
vehicle.
• Do not idle the engine with any spark plug wires
disconnected or removed, such as when diagnostic
testing, or for prolonged periods during very rough
idle or malfunctioning operating conditions.
708 MAINTAINING YOUR VEHICLE
Page 769 of 806
Maintenance Chart
Mileage or time passed
(whichever comes first)
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
Or Years: 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
32,000
48,000
64,000
80,000
96,000
112,000
128,000
144,000
160,000
176,000
192,000
208,000
224,000
240,000
Additional Inspections
Inspect the CV/Universal joints. X XX X X
Inspect front suspension, tie rod
ends, and replace if necessary. XXX X X X X
Inspect the front and rear axle
surfaces. If gear oil leakage is
suspected, check the fluid level.
If using your vehicle for police,
taxi, fleet, off-road or frequent
trailer towing, change axle fluid. XXX X X X X
8
M
A I
N T
E
N
A
N
C E
S
C
H E
D
U L
E
SMAINTENANCE SCHEDULES 767
Page 771 of 806
Mileage or time passed
(whichever comes first)
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
Or Years: 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
32,000
48,000
64,000
80,000
96,000
112,000
128,000
144,000
160,000
176,000
192,000
208,000
224,000
240,000
Replace spark plugs
(6.4L engine).** X
Flush and replace the engine
coolant at 10 years or 150,000
miles (240,000 km) whichever
comes first. XX
Change automatic transmission
fluid and filter(s) (six-speed auto-
matic only), if using your vehicle
for police, taxi, fleet, or frequent
trailer towing. X
8
M
A I
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E
N
A
N
C E
S
C
H E
D
U L
E
SMAINTENANCE SCHEDULES 769
Page 772 of 806
Mileage or time passed
(whichever comes first)
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
Or Years: 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
32,000
48,000
64,000
80,000
96,000
112,000
128,000
144,000
160,000
176,000
192,000
208,000
224,000
240,000
Change automatic transmission
fluid and filter (six-speed auto-
matic only). X
Inspect the transfer case fluid,
change for any of the following:
police, taxi, fleet, or frequent
trailer towing. X
Change the transfer case fluid. X
Inspect and replace PCV valve if
necessary. X
** The spark plug change interval is mileage based only,
yearly intervals do not apply.
8
M
A I
N T
E
N
A
N
C E
S
C
H E
D
U L
E
S770 MAINTENANCE SCHEDULES
Page 789 of 806

Cupholders............................ .233
Customer Assistance ...................... .775
Data Recorder, Event .......................82
Daytime Running Lights ....................172
Dealer Service ........................... .695
Defroster, Rear Window .....................244
Defroster, Windshield ..................... .122
Delay (Intermittent) Wipers ..................181
Differential, Limited-Slip ....................492
Dipsticks Power Steering ........................ .520
Disabled Vehicle Towing ....................682
Disposal Antifreeze (Engine Coolant) ................713
Door Locks Door Locks ............................37
KeyFob...............................37
Remote ...............................37 Remote Keyless Entry (RKE)
................37
Door Locks, Automatic ......................39
Door Opener, Garage ...................... .214
Driving Off-Pavement ......................... .474
Off-Road ............................ .474
Through Flowing, Rising, or Shallow Standing
Water ............................... .494
Dual Rear Wheels ........................ .565
E-85 Fuel .............................. .582
Electrical Power Outlets .....................227
Electric Rear Window Defrost .................244
Electronically Shifted Transfer Case .............440
Electronic Brake Control System ...............526
Anti-Lock Brake System ..................527
Brake Assist System .....................528
Traction Control System ...................527
Electronic Range Select (ERS) .................410
10
INDEX 787
Page 793 of 806

Switch.............................. .170
Head Restraints ......................... .160
Heated Mirrors .......................... .144
Heater ................................ .361
Heater, Engine Block ...................... .399
High Beam/Low Beam Select (Dimmer) Switch . . . .180
Hitches Trailer Towing ........................ .594
Hoisting ............................... .671
HomeLink® (Garage Door Opener) ............214
Hood Release ........................... .168
Hub Caps .............................. .669
Ignition .................................16
Key..................................12
Ignition Key Removal .......................16
Illuminated Entry ..........................23
Immobilizer (Sentry Key) ....................19
Infant Restraint ...........................83 Inflation Pressure Tires
.....................561
Information Center, Vehicle ..................297
Inside Rearview Mirror .....................132
Instrument Cluster ....................... .284
Instrument Panel and Controls ................281
Instrument Panel Lens Cleaning ...............730
Integrated Trailer Brake Controls ..............604
Interior Appearance Care ....................728
Interior Lights .......................... .175
Intermittent Wipers (Delay Wipers) .............181
Introduction ..............................4
Inverter Outlet (115V) ..................... .232
Jack Location ........................... .633
Jump Starting ........................... .671
Key Fob Programming Additional Key Fobs ...........21
Programming Additional Transmitters .........21
10
INDEX 791