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including towing a trailer. The trailer button will blink
continuously until trailer height has been achieved.
The system requires that the ignition be in ON/RUN
position or the engine running for all user requested
changes.
After the engine is turned off, it may be noticed that the
air suspension system operates briefly, this is normal. The
system is correcting the position of the vehicle to ensure
a proper appearance.
NOTE:If equipped with a touch screen radio all
enabling/disabling of air suspension features must be
done through the radio. Refer to “Uconnect® Access
Settings” in “Understanding Your Instrument Panel” for
further information.WARNING!
The air suspension system uses a high pressure
volume of air to operate the system. To avoid per-
sonal injury or damage to the system, see your
authorized dealer for service.
Air Suspension Modes
The Air Suspension system has multiple modes to protect
the system in unique situations:
Tire/Jack Mode
To assist with changing a spare tire, the air suspension
system has a feature which allows the automatic leveling
to be disabled. This mode is intended to be used with
engine running. Refer to “Electronic Vehicle Information
Center (EVIC)” in “Understanding Your Instrument
Panel” for further information.
5
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Electronic Vehicle Information Center (EVIC)
Display Messages
When the appropriate conditions exist, a message will
appear in the EVIC display. Refer to “Electronic Vehicle
Information Center (EVIC)” in “Understanding Your
Instrument Panel” for further information.
An audible chime will be heard whenever a system error
has been detected.
Operation
Pushing the Trailer Mode button once, while at Normal
Ride Height (NRH) will lower the vehicle to trailer level.
NOTE:The LED will continuously blink until vehicle
trailer level that been achieved.
Pushing the Trailer Mode again will raise the vehicle to
Normal Ride Height (NRH). NOTE:
The LED will continuously blink until Normal
Ride Height (NRH) has been achieved.
• Transport Mode – No indicator lamps will be illumi-
nated. Transport Mode is disabled by driving the
vehicle.
• Tire/Jack Mode – The LED will be illuminated. Tire/
Jack Mode is disabled by driving the vehicle.
• Wheel Alignment Mode – The LED will be illumi-
nated. Wheel Alignment Mode is disabled by driving
the vehicle.
AXLE LOCKER SYSTEM — POWER WAGON
MODELS ONLY — (IF EQUIPPED)
This vehicle is equipped with electronically locking front
and rear differentials. These differentials, when engaged,
mechanically lock together the axle shafts forcing the
wheels to spin at an equal rate. This allows the vehicle to
maintain its momentum and prevents it from becoming
5
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what is the best direction to recover the vehicle. Depend-
ing on what you are in contact with, jack the vehicle up
and place a few rocks under the tires so the weight is off
of the high point when you let the vehicle down. You can
also try rocking the vehicle or winching the vehicle off
the object.
CAUTION!
Winching or rocking the vehicle off hard objects
increases the risk of underbody damage.
Hill Climbing
Hill climbing requires good judgment and a good under-
standing of your abilities and your vehicle’s limitations.
Hills can cause serious problems. Some are just too steep
to climb and should not be attempted. You should alwaysfeel confident with the vehicle and your abilities. You
should always climb hills straight up and down. Never
attempt to climb a hill on an angle.
•
Before Climbing A Steep Hill – As you approach a
hill consider its grade or steepness. Determine if it is
too steep. Look to see what the traction is on the hill
side trail. Is the trail straight up and down? What is on
top and the other side? Are there ruts, rocks, branches
or other obstacles on the path? Can you safely recover
the vehicle if something goes wrong? If everything
looks good and you feel confident, then change trans-
mission into a lower gear, shift the transfer case into 4L
(Low) and proceed with caution. You should use first
gear and 4L (Low Range) for very steep hills.
• Driving Up Hill – Once you have determined your
ability to proceed and have shifted into the appropri-
ate gear, line your vehicle up for the straightest pos-
sible run. Accelerate with an easy constant throttle and
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severely hung up on something you should jack the
vehicle up and stack something under the wheels to
allow the vehicle to roll off the object without causing
further damage. This should be tried before attempting
any recovery method.
CAUTION!
Pulling the vehicle off an obstacle, without first
clearing the object, may result in additional under-
body damage.
• Rock Cycling Your Vehicle – Rock cycling your ve-
hicle is one of the easiest, fastest and most commonly
used methods. This simply involves shifting your
vehicle from DRIVE to REVERSE, while applying
throttle after each shift. During this process, for addi-
tional traction, try turning your steering wheel quickly
back and forth no more than a ¼ turn. If you are stuck
in mud, sand, or snow try spinning your tires during this process to clean the debris from the tread and
improve the traction. You want to create a rocking
motion with the vehicle. This helps build vehicle
momentum, which hopefully gets you out. Remember
to ease off and on the accelerator before and after the
shift. If after a few rock cycles your vehicle is not free,
stop and try another method of recovery. Continuous
rock cycling will only cause unnecessary damage to
your vehicle and the environment.
CAUTION!
Damage can occur when spinning your tires at an
excessive high speed. Do not spin your tires faster
than an indicated 30 mph (48 km/h).
• Using The Tow Hooks With A Tow Strap – Tow straps
are a quick and easy way to recover your vehicle from
minor situations if you have a secondary vehicle which
is not stuck. The tow hooks on your vehicle are
480 STARTING AND OPERATING
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WHAT TO DO IN EMERGENCIES
CONTENTS
HAZARD WARNING FLASHERS ...........617
IF YOUR ENGINE OVERHEATS ............617
WHEEL AND TIRE TORQUE
SPECIFICATIONS ..................... .618
▫ Torque Specifications ..................619
JACKING AND TIRE CHANGING ..........621
▫
Jacking And Tire Changing 1500 Series Trucks . .621
▫ Jacking And Tire Changing 2500 And 3500 Series
Trucks ............................ .639
HOISTING .......................... .659
JUMP-STARTING PROCEDURES ...........659
▫ Preparations For Jump-Start ..............660
▫ Jump-Starting Procedure ................661
FREEING A STUCK VEHICLE .............663
EMERGENCY TOW HOOKS — IF EQUIPPED . .665
SHIFT LEVER OVERRIDE ................666
▫ Column Shifter — If Equipped ............666
▫ Center Console Shifter — If Equipped .......667
6
Page 622 of 790
Tighten the lug nuts/bolts in a star pattern until each
nut/bolt has been tightened twice.
After 25 miles (40 km) check the lug nut/bolt torque to be
sure that all the lug nuts/bolts are properly seated
against the wheel.WARNING!
To avoid the risk of forcing the vehicle off the jack,
do not tighten the lug nuts fully until the vehicle has
been lowered. Failure to follow this warning may
result in personal injury.
Wheel Mounting Surface4 And 5 Lug Nuts/Bolts Torque Pattern
620 WHAT TO DO IN EMERGENCIES
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JACKING AND TIRE CHANGING
Jacking And Tire Changing 1500 Series Trucks
WARNING!
•Do not attempt to change a tire on the side of the
vehicle close to moving traffic. Pull far enough off
the road to avoid the danger of being hit when
operating the jack or changing the wheel.
• Being under a jacked-up vehicle is dangerous. The
vehicle could slip off the jack and fall on you. You
could be crushed. Never put any part of your body
under a vehicle that is on a jack. If you need to get
under a raised vehicle, take it to a service center
where it can be raised on a lift.
• Never start or run the engine while the vehicle is
on a jack.
(Continued)
WARNING! (Continued)
•The jack is designed to be used as a tool for
changing tires only. The jack should not be used to
lift the vehicle for service purposes. The vehicle
should be jacked on a firm level surface only.
Avoid ice or slippery areas.
NOTE: To assist with changing a spare tire, the air
suspension system has a feature which allows the auto-
matic leveling to be disabled. Refer to “Electronic Vehicle
Information Center (EVIC)” in “Understanding Your
Instrument Panel” for further information.
Jack Location
The jack and jack tools are stored under the front
passenger seat.
6
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Removal Of Jack And Tools (1500 Series)
To access the jack and jack tools you must remove the
plastic access cover, located on the side of the front
passengers seat. To remove the cover, pull the front part
of the cover (closest to the front of the seat) toward you
to release a locking tab. Once the front of the cover is
loose, slide the cover toward the front of the seat until it
is free from the seat frame.Remove the jack and tools by turning the wing bolt
counterclockwise, remove the wing bolt and then slide
the assembly out from under the seat.
Jack Access Cover
622 WHAT TO DO IN EMERGENCIES