WARNING!(Continued)
•Never start or run the engine while the vehicle is on
a jack.
• 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: If your vehicle is equipped with an air suspension
system, there is a feature which allows the automatic
leveling to be disabled to assist with changing a tire.
If your vehicle is equipped with a touchscreen, this feature
can be activated through the Uconnect system. Refer to
“Uconnect Settings” in “Understanding Your Instrument
Panel” for further information.
If your vehicle is not equipped with a touchscreen, this
feature can be activated through the instrument cluster
display. Refer to “Instrument Cluster Display” in “Under-
standing Your Instrument Panel” for further information.
Jack Location
The jack and jack tools are stored under the front passenger
seat.
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 passen-
ger ’s 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.
Jack Access Cover
584 WHAT TO DO IN EMERGENCIES
HOISTING
A conventional floor jack may be used at the jacking
locations. Refer to the graphics that show jacking locations.
However, a floor jack or frame hoist must never be used on
any other parts of the underbody.
CAUTION!
Never use a floor jack directly under the differential
housing of a loaded truck or damage to your vehicle
may result.
JUMP-STARTING PROCEDURES
If your vehicle has a discharged battery, it can be jump-
started using a set of jumper cables and a battery in another
vehicle or by using a portable battery booster pack. Jump-
starting can be dangerous if done improperly, so please
follow the procedures in this section carefully.
NOTE:When using a portable battery booster pack, follow
the manufacturer ’s operating instructions and precautions.
WARNING!
Do not attempt jump-starting if the battery is frozen. It
could rupture or explode and cause personal injury.
CAUTION!
Do not use a portable battery booster pack or any other
booster source with a system voltage greater than 12
Volts or damage to the battery, starter motor, alternator
or electrical system may occur.
Preparations For Jump-Start
The battery in your vehicle is located in the front of the
engine compartment, behind the left headlight assembly.
NOTE: The positive battery post may be covered with a
protective cap if equipped. Lift up on the cap to gain access
to the positive battery post. Do not jump off fuses. Only
jump directly off positive post which has a positive (+)
symbol on or around the post.
618 WHAT TO DO IN EMERGENCIES
Jump-Starting Procedure
WARNING!
Failure to follow this jump-starting procedure could
result in personal injury or property damage due to
battery explosion.
CAUTION!
Failure to follow these procedures could result in
damage to the charging system of the booster vehicle
or the discharged vehicle.
Connecting The Jumper Cables
1. Connect the positive (+)end of the jumper cable to the
positive (+)post of the discharged vehicle.
NOTE: Do not jump off fuses. Only jump directly off
positive post.
2. Connect the opposite end of the positive (+)jumper
cable to the positive (+)post of the booster battery.
3. Connect the negative (-)end of the jumper cable to the
negative (-)post of the booster battery. 4. Connect the opposite end of the negative
(-)jumper
cable to a good engine ground (exposed metal part of
the discharged vehicle’s engine) away from the battery
and the fuel injection system.
WARNING!
Do not connect the jumper cable to the negative (-) post
of the discharged battery. The resulting electrical spark
could cause the battery to explode and could result in
personal injury. Only use the specific ground point, do
not use any other exposed metal parts.
5. Start the engine in the vehicle that has the booster battery, let the engine idle a few minutes, and then start
the engine in the vehicle with the discharged battery.
CAUTION!
Do not connect jumper cable to any of the fuses on the
positive battery terminal. The resulting electrical cur-
rent will blow the fuse.
6. Once the engine is started, remove the jumper cables in the reverse sequence:
620 WHAT TO DO IN EMERGENCIES
Disconnecting The Jumper Cables
1. Disconnect the negative(-)end of the jumper cable from
the engine ground of the vehicle with the discharged
battery.
2. Disconnect the opposite end of the negative (-)jumper
cable from the negative (-)post of the booster battery.
3. Disconnect the positive (+)end of the jumper cable from
the positive (+)post of the booster battery.
4. Disconnect the opposite end of the positive (+)jumper
cable from the positive (+)post of the vehicle with the
discharged battery.
If frequent jump-starting is required to start your vehicle
you should have the battery and charging system in-
spected at your authorized dealer.
CAUTION!
Accessories plugged into the vehicle power outlets
draw power from the vehicle’s battery, even when not
in use (i.e., cellular devices, etc.). Eventually, if plugged
in long enough without engine operation, the vehicle’s
battery will discharge sufficiently to degrade battery
life and/or prevent the engine from starting.
FREEING A STUCK VEHICLE
If your vehicle becomes stuck in mud, sand, or snow, it can
often be moved using a rocking motion. Turn the steering
wheel right and left to clear the area around the front
wheels. Then shift back and forth between DRIVE and
REVERSE (with automatic transmission) or 2nd gear and
REVERSE (with manual transmission), while gently press-
ing the accelerator. Use the least amount of accelerator
pedal pressure that will maintain the rocking motion,
without spinning the wheels or racing the engine.
NOTE: For trucks equipped with 8-speed automatic trans-
mission: 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.
6
WHAT TO DO IN EMERGENCIES 621
CAUTION!
Racing the engine or spinning the wheels may lead to
transmission overheating and failure. Allow the en-
gine 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.
NOTE: Push the ESC Off switch, to place the Electronic
Stability Control (ESC) system in Partial Offmode, before
rocking the vehicle. Refer to “Electronic Brake Control” in
“Starting And Operating” for further information. Once
the vehicle has been freed, push the ESC Offswitch again
to restore ESC Onmode.
WARNING!
Fast spinning tires can be dangerous. Forces generated
by excessive wheel speeds may cause damage, or even
failure, of the axle and tires. A tire could explode and
injure someone. Do not spin your vehicle’s wheels
faster than 30 mph (48 km/h) or for longer than 30
seconds continuously without stopping when you are
stuck and do not let anyone near a spinning wheel, no
matter what the speed.
CAUTION!
•When “rocking” a stuck vehicle by shifting between
DRIVE/2nd gear and REVERSE, do not spin the
wheels faster than 15 mph (24 km/h), or drivetrain
damage may result.
• Revving the engine or spinning the wheels too fast
may lead to transmission overheating and failure. It
can also damage the tires. Do not spin the wheels
above 30 mph (48 km/h) while in gear (no transmis-
sion shifting occurring).
622 WHAT TO DO IN EMERGENCIES
ENHANCED ACCIDENT RESPONSE SYSTEM
(EARS)
This vehicle is equipped with an Enhanced Accident Re-
sponse System.
Please refer to “Supplemental Restraint System (SRS) —
Air Bags” in “Occupant Restraints” for further information
on the Enhanced Accident Response System (EARS) func-
tion.
EVENT DATA RECORDER (EDR)
This vehicle is equipped with an Event Data Recorder
(EDR). The main purpose of an EDR is to record, in certain
crash or near crash-like situations, such as an air bag
deployment or hitting a road obstacle, data that will assist
in understanding how a vehicle’s systems performed.
Please refer to “Supplemental Restraint System (SRS) —
Air Bags” in “Occupant Restraints” for further information
on the Event Data Recorder (EDR).
630 WHAT TO DO IN EMERGENCIES
MAINTAINING YOUR VEHICLE
CONTENTS
ENGINE COMPARTMENT — 3.6L ...........633
ENGINE COMPARTMENT — 5.7L ...........634
ENGINE COMPARTMENT — 6.4L ...........635
ONBOARD DIAGNOSTIC SYSTEM (OBD II) . . . .636
▫ Onboard Diagnostic System (OBD II)
Cybersecurity ........................ .636
▫ Loose Fuel Filler Cap Message .............637
EMISSIONS INSPECTION AND
MAINTENANCE PROGRAMS ..............637
REPLACEMENT PARTS ...................639
DEALER SERVICE ...................... .639
MAINTENANCE PROCEDURES .............639
▫ Engine Oil .......................... .640
▫ Engine Oil Filter ...................... .642
▫ Engine Air Cleaner Filter .................643 ▫
Accessory Drive Belt Inspection ............646
▫ Maintenance-Free Battery .................648
▫ Air Conditioner Maintenance ..............649
▫ Front Driveshaft Lubrication — 2500/3500
(Four-Wheel Drive Models Only) ............655
▫ Body Lubrication ..................... .656
▫ Windshield Wiper Blades .................656
▫ Adding Washer Fluid ...................659
▫ Exhaust System ....................... .660
▫ Cooling System ....................... .662
▫ Brake System ........................ .667
▫ Rear Axle And 4x4 Front Driving
Axle Fluid Level ...................... .668
▫ Transfer Case ........................ .669
▫ Automatic
Transmission ..................669
7
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 trans-
mission control systems. When these systems are operating
properly, your vehicle will provide excellent performance
and fuel economy, as well as engine emissions 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. Although
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.
(Continued)
CAUTION! (Continued)
•If the MIL is flashing, while the engine is running,
severe catalytic converter damage and power loss
will soon occur. Immediate service is required.
Onboard Diagnostic System (OBD II) Cybersecurity
Your vehicle is required to have an Onboard Diagnostic
system (OBD II) and a connection port to allow access to
information related to the performance of your emissions
controls. Authorized service technicians may need to ac-
cess this information to assist with the diagnosis and
service of your vehicle and emissions system.
WARNING!
• ONLY an authorized service technician should con-
nect equipment to the OBD II connection port in
order to diagnose or service your vehicle.
• If unauthorized equipment is connected to the OBD
II connection port, such as a driver-behavior tracking
device, it may:
• Be possible that vehicle systems, including safety
related systems, could be impaired or a loss of
(Continued)
636 MAINTAINING YOUR VEHICLE