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•An electronically actuated trailer brake controller is
required when towing a trailer with electronically actu-
ated brakes. When towing a trailer equipped with a
hydraulic surge actuated brake system, an electronic
brake controller is not required.
• Trailer brakes are recommended for trailers over
1,000 lbs (453 kg) and required for trailers in excess of
2,000 lbs (907 kg).
CAUTION!
If the trailer weighs more than 1,000 lbs (453 kg)
loaded, it should have its own brakes and they should
(Continued)
Page 310 of 516

Standing Water — Trailhawk Only
Avoid driving in standing water deeper than 19 inches (48
cm), and reduce speed appropriately to minimize wave
effects. Maximum speed in 19 inches (48 cm) of water is
less than 5 mph (8 km/h).
Maintenance
After driving through deep water, inspect your vehicle
fluids and lubricants (engine, transmission, Power Transfer
Unit and Rear Drive Module) to assure they have not been
contaminated. Contaminated fluids and lubricants (milky,
foamy in appearance) should be flushed/changed as soon
as possible to prevent component damage.
Driving In Snow, Mud And Sand
In heavy snow, when pulling a load, or for additional
control at slower speeds, shift the transmission to a low
gear and shift the 4WD system to the appropriate terrain
mode, using 4WD LOW if necessary. Refer to “Four-Wheel
Drive Operation” in “Starting And Operating” for further
information. Do not shift to a lower gear than necessary to
maintain headway. Over-revving the engine can spin the
wheels and traction will be lost.
Avoid abrupt downshifts on icy or slippery roads because
engine braking may cause skidding and loss of control.
Hill Climbing
NOTE:Before attempting to climb a hill, determine the
conditions at the crest and/or on the other side.
Before climbing a steep hill, shift the transmission to a
lower gear and shift the 4WD System to 4WD LOW. Use
first gear and 4WD LOW for very steep hills.
If you stall or begin to lose headway while climbing a
steep hill, allow your vehicle to come to a stop and
immediately apply the brakes. Restart the engine and shift
to REVERSE. Back slowly down the hill allowing the
compression braking of the engine to help regulate your
speed. If the brakes are required to control vehicle speed,
apply them lightly and avoid locking or skidding the tires.
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WARNING!
Abrasive material in any part of the brakes may cause
excessive wear or unpredictable braking. You might
not have full braking power when you need it to
prevent a collision. If you have been operating your
vehicle in dirty conditions, get your brakes checked
and cleaned as necessary.
• If you experience unusual vibration after driving in
mud, slush or similar conditions, check the wheels for
impacted material. Impacted material can cause a wheel
imbalance and freeing the wheels of it will correct the
situation.
310 STARTING AND OPERATING
Page 369 of 516

and hold the lock button on the gear selector. Then shift
back and forth between DRIVE and REVERSE (with auto-
matic transmission) or SECOND GEAR and REVERSE
(with manual transmission), while gently pressing the
accelerator.
Use the least amount of accelerator pedal pressure that will
maintain the rocking motion without spinning the wheels
or racing the engine.
For Vehicles With Automatic Transmission:
Shifts between DRIVE and REVERSE can only be achieved
at wheel speeds of 5 mph (8 km/h) or less. Whenever the
transmission remains in NEUTRAL for more than two
seconds, you must press the brake pedal to engage DRIVE
or REVERSE.
NOTE:Push the ESC Off switch (if necessary), to place
the Electronic Stability Control (ESC) system in Partial Off
mode, before rocking the vehicle. Refer to “Electronic
Brake Control” in “Safety” for further information. Once
the vehicle has been freed, push the ESC Offswitch again
to restore ESC Onmode.
CAUTION!
•Racing the engine or spinning the wheels may lead
to transmission overheating and failure. Allow the
engine to idle with the transmission in NEUTRAL
for at least one minute after every five rocking-
motion cycles. This will minimize overheating and
reduce the risk of clutch or transmission failure
during prolonged efforts to free a stuck vehicle.
• When “rocking” a stuck vehicle by shifting between
DRIVE/ SECOND gear and REVERSE, do not spin
the wheels faster than 15 mph (24 km/h), or drive-
train damage may result.
(Continued)
7
IN CASE OF EMERGENCY 367
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Place the ignition in the RUN and subsequently on ON,
without opening the door. During towing remember that
not having the aid of the power brakes and the electrome-
chanical power steering, greater force is needed in apply-
ing the brakes and steering of the vehicle.
CAUTION!
Tow hooks are for emergency use only, to rescue a
vehicle stranded off road. Do not use tow hooks for
tow truck hookup or highway towing. You could
damage your vehicle.
Rear Tow Hook Location
7
IN CASE OF EMERGENCY 371
Page 383 of 516
* The oil and oil filter replacement must be carried out
when indicated by a warning light or message on the
instrument panel, or in any case should not exceed 1 year
or 10,000 miles (16,000 km).
** The spark plug change is distance based only, yearly
intervals do not apply. The following are essential to ensure
correct operation and prevent serious damage to the en-
gine:
•Only use spark plugs of the same make and type which
are specially certified for such engines (refer to “Fluids
and Lubricants” in “Technical Specifications” for further
information).
• Strictly comply with the spark plug replacement interval
given in the “Maintenance Schedule” for spark plug
replacement.
• Contact your authorized dealer if you have any ques-
tions.
*** The brake fluid change interval is time based only,
mileage intervals do not apply.
Page 400 of 516
MS.90032) and distilled water for proper corrosion pro-
tection of your engine which contains aluminum com-
ponents.
• Keep the front of the radiator clean. If your vehicle is
equipped with air conditioning, keep the front of the
condenser clean.
• Do not change the thermostat for Summer or Winter
operation. If replacement is ever necessary, install ONLY
the correct type thermostat. Other designs may result in
unsatisfactory engine coolant (antifreeze) performance,
poor gas mileage, and increased emissions.
Brake System
In order to assure brake system performance, all brake
system components should be inspected periodically. Refer
to the “Maintenance Plan” in this section for the proper
maintenance intervals.
Page 401 of 516

NOTE:If your vehicle is equipped with a manual trans-
mission, the brake fluid reservoir supplies fluid to both the
brake system and the clutch release system. The two
systems are separated in the reservoir, and a leak in one
system will not affect the other system. The manual
transmission clutch release system should not require fluid
replacement during the life of the vehicle. If the brake fluid
reservoir is low and the brake system does not indicate any
leaks or other problems, it may be a result of a leak in the
hydraulic clutch release system. See your local authorized
dealer for service.
Use only manufacturer’s recommended brake fluid. Refer
to “Fluids And Lubricants” in the “Technical Specifica-
tions” section for further information.
CAUTION!
Use of improper brake fluids will affect overall clutch
system performance. Improper brake fluids may dam-
age the clutch system resulting in loss of clutch func-
tion and the ability to shift the transmission.
8
SERVICING AND MAINTENANCE 399