
Vehicles driven year-round in non-extreme climates should use a 50/50
mixture of engine coolant and distilled water for optimum cooling system
and engine protection.
What you should know about fail-safe cooling (4.6L V8 engine only)
If the engine coolant supply is depleted, this feature allows the vehicle to
be driven temporarily before incremental component damage is incurred.
The ªfail-safeº distance depends on ambient temperatures, vehicle load
and terrain.
Fail-safe cooling and engine oil temperature sensor (4.6L V8 only)
If the engine coolant and/or engine oil overheat, the vehicle limits engine
power before engine damage can occur. The instrument cluster can
provide up to four indicators to warn of coolant and/or oil overheat.
Warning lights/indicators Fail Safe cooling Oil Overheat Only*
(Engine oil pressure)OnOffÐwith normal
oil pressure
(Service engine soon)On Off
(Engine coolant temperature)On On
Engine coolant temperature gage Hot (H) area Hot (H) area
*Oil overheat warnings can be triggered in severe driving conditions, such as
towing heavy loads over mountainous terrain in extreme hot temperatures.
If the engine fluids reach even hotter temperatures, fail-safe cooling
protects the engine by limiting engine power further and may disable the
air conditioning system. The engine will automatically switch to
alternating cylinder operation. Each disabled cylinder acts as an air
pump and cools the engine. During this mode, the engine will run rough.
If continued operation increases the engine temperature to a critical
range, the engine will shut down. Steering and braking effort will
increase. Once engine temperature cools, the engine can be restarted.
When fail-safe mode is activated
You have limited engine power when in the fail-safe mode, so drive the vehicle
with caution. The vehicle will not be able to maintain high speed operation and
the engine will run rough. Remember that the engine is capable of completely
shutting down automatically to prevent engine damage, therefore:
1. Pull off the road as soon as safely possible and turn off the engine.
2. Arrange for the vehicle to be taken to an authorized dealer.
Maintenance and Specifications
293

²Theindicator may come on. For more information on the ªCheck
Engineº or the ªService engine soonº indicator, refer toWarning
lights and chimesin theInstrument Clusterchapter.
ESSENTIALS OF GOOD FUEL ECONOMY
Measuring techniques
Your best source of information about actual fuel economy is you, the
driver. You must gather information as accurately and consistently as
possible. Fuel expense, frequency of fill-ups or fuel gauge readings are
NOT accurate as a measure of fuel economy. We do not recommend taking
fuel economy measurements during the first 1,000 miles (1,600 km) of
driving (engine break-in period). You will get a more accurate
measurement after 2,000 miles-3,000 miles (3,000 km±5,000 km).
Filling the tank
The advertised fuel capacity of the fuel tank on your vehicle is equal to
the rated refill capacity of the fuel tank as listed in theRefill capacities
section of this chapter.
The advertised capacity is the amount of the indicated capacity and the
empty reserve combined. Indicated capacity is the difference in the
amount of fuel in a full tank and a tank when the fuel gauge indicates
empty. Empty reserve is the small amount of fuel remaining in the fuel
tank after the fuel gauge indicates empty.
The amount of usable fuel in the empty reserve varies and should
not be relied upon to increase driving range. When refueling your
vehicle after the fuel gauge indicates empty, you might not be
able to refuel the full amount of the advertised capacity of the
fuel tank due to the empty reserve still present in the tank.
For consistent results when filling the fuel tank:
²Turn the engine/ignition switch to the off position prior to refueling,
an error in the reading will result if the engine is left running.
²Use the same filling rate setting (low Ð medium Ð high) each time
the tank is filled.
²Allow no more than two automatic click-offs when filling.
²Always use fuel with the recommended octane rating.
²Use a known quality gasoline, preferably a national brand.
²Use the same side of the same pump and have the vehicle facing the
same direction each time you fill up.
Maintenance and Specifications
299

²Revving the engine before turning it off may reduce fuel economy.
²Using the air conditioner or defroster may reduce fuel economy.
²
You may want to turn off the speed control in hilly terrain if unnecessary
shifting between third and fourth gear occurs. Unnecessary shifting of
this type could result in reduced fuel economy.
²Warming up a vehicle on cold mornings is not required and may
reduce fuel economy.
²Resting your foot on the brake pedal while driving may reduce fuel
economy.
²Combine errands and minimize stop-and-go driving.
Maintenance
²Keep tires properly inflated and use only recommended size.
²Operating a vehicle with the wheels out of alignment will reduce fuel
economy.
²Use recommended engine oil. Refer toLubricant specificationsin
this chapter.
²Perform all regularly scheduled maintenance items. Follow the
recommended maintenance schedule and owner maintenance checks
found inscheduled maintenance information.
Conditions
²Heavily loading a vehicle or towing a trailer may reduce fuel economy
at any speed.
²Carrying unnecessary weight may reduce fuel economy (approximately
1 mpg [0.4 km/L] is lost for every 400 lb [180 kg] of weight carried).
²Adding certain accessories to your vehicle (for example bug
deflectors, rollbars/light bars, running boards, ski/luggage racks) may
reduce fuel economy.
²Fuel economy may decrease with lower temperatures during the first
8±10 miles (12±16 km) of driving.
²Driving on flat terrain offers improved fuel economy as compared to
driving on hilly terrain.
²Transmissions give their best fuel economy when operated in the top
cruise gear and with steady pressure on the gas pedal.
²Four-wheel-drive operation (if equipped) is less fuel efficient than
two-wheel-drive operation.
Maintenance and Specifications
301

Interior style
Electrochromatic compass/temperature interior mirrors
Floor mats
Scuff plates
Lifestyle
Bike racks
Cargo organization and management
Neutral tow kit
Rear seat entertainment systems
Trailer hitches, wiring harnesses and accessories
Peace of mind
First aid and highway safety kits
Full vehicle covers
Locking gas cap
Remote start
Vehicle security systems
Keyless entry keypad
For maximum vehicle performance, keep the following information in
mind when adding accessories or equipment to your vehicle:
²When adding accessories, equipment, passengers and luggage to your
vehicle, do not exceed the total weight capacity of the vehicle or of
the front or rear axle (GVWR or GAWR as indicated on the Safety
Compliance Certification label). Consult your authorized dealer for
specific weight information.
²The Federal Communications Commission (FCC) and Canadian Radio
Telecommunications Commission (CRTC) regulate the use of mobile
communications systems Ð such as two-way radios, telephones and
theft alarms - that are equipped with radio transmitters. Any such
equipment installed in your vehicle should comply with FCC or CRTC
regulations and should be installed only by a qualified service
technician.
Accessories
318

Tires ...........................172±174, 246
alignment ................................184
care ..........................................181
changing ..........................246, 252
checking the pressure ............177
inspecting and inflating .........175
label .........................................181
replacing ..........................183, 252
rotating ....................................185
safety practices .......................184
sidewall information ...............177
snow tires and chains ............192
spare tire .................247, 249, 251
terminology .............................174
tire grades ...............................173
treadwear ........................173, 182
Towing .......................................199
recreational towing .................205
trailer towing ..........................199
wrecker ....................................261
Transfer case
fluid checking .........................306
Transmission .............................217
brake-shift interlock (BSI) ....217
fluid, checking and adding
(automatic) .............................305
fluid, refill capacities ..............308lubricant specifications ..310, 313
Trunk .........................................102
Turn signal ..................................45
V
Vehicle dimensions ...................313
Vehicle Identification Number
(VIN) ..........................................315
Vehicle loading ..........................192
Ventilating your vehicle ...........209
W
Warning lights (see Lights) .......12
Washer fluid ..............................280
Water, Driving through .............234
Windows
power .........................................57
rear wiper/washer .....................53
Windshield washer fluid and
wipers ..........................................52
checking and adding fluid .....280
liftgate reservoir .....................280
replacing wiper blades ...........281
Wrecker towing .........................261
Index
325