Periodic Safety Checks You Should Make Outside
The Vehicle
Tires
Examine tires for excessive tread wear and uneven wear
patterns. Check for stones, nails, glass, or other objects
lodged in the tread or sidewall. Inspect the tread for cuts
and cracks. Inspect sidewalls for cuts, cracks, and bulges.
Check the wheel bolts for tightness. Check the tires
(including spare) for proper cold inflation pressure.
Lights
Have someone observe the operation of brake lights and
exterior lights while you work the controls. Check turn
signal and high beam indicator lights on the instrument
panel.
Door Latches
Check for proper closing, latching, and locking.
Fluid Leaks
Check area under vehicle after overnight parking for fuel,
engine coolant, oil, or other fluid leaks. Also, if gasoline
fumes are detected or if fuel, power steering fluid (if
equipped), or brake fluid leaks are suspected. The cause
should be located and corrected immediately.
2
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 121
Tire Pressure Monitoring Indicator Light
Yellow Telltale
LightWhat It Means
Tire Pressure Monitoring Indicator Light
The warning light switches on and a message is displayed to indicate that the tire pressure
is lower than the recommended value and/or that slow pressure loss is occurring. In these
cases, optimal tire duration and fuel consumption may not be guaranteed.
Should one or more tires be in the condition mentioned above, the display will show the
indications corresponding to each tire in sequence.
In any situation in which the message on the display isSee manual, it is ESSENTIAL to
refer to the contents of theWheelsparagraph in theTechnical datachapter, strictly com-
plying with the indications that you find there.
314 UNDERSTANDING YOUR INSTRUMENT PANEL
IMPORTANT:Do not continue driving with one or more
flat tires as handling may be compromised. Stop the
vehicle, avoiding sharp braking and steering. Repair
immediately using the dedicated tire repair kit and
contact your authorized dealership as soon as possible.
Each tire, including the spare (if provided), should be
checked monthly when cold and inflated to the inflation
pressure recommended by the vehicle manufacturer on
the vehicle placard or tire inflation pressure label. If your
vehicle has tires of a different size than the size indicated
on the vehicle placard or tire inflation pressure label, you
should determine the proper tire inflation pressure for
those tires.
As an added safety feature, your vehicle has been
equipped with a Tire Pressure Monitoring System
(TPMS) that illuminates a low tire pressure telltale when
one or more of your tires is significantly under-inflated.Accordingly, when the low tire pressure telltale illumi-
nates, you should stop and check your tires as soon as
possible and inflate them to the proper pressure. Driving
on a significantly under-inflated tire causes the tire to
overheat and can lead to tire failure. Under-inflation also
reduces fuel efficiency and tire tread life, and may affect
the vehicle’s handling and stopping ability.
Please note that the TPMS is not a substitute for proper
tire maintenance, and it is the driver ’s responsibility to
maintain correct tire pressure, even if under-inflation has
not reached the level to trigger illumination of the TPMS
low tire pressure telltale.
Your vehicle has also been equipped with a TPMS
malfunction indicator to indicate when the system is not
operating properly. The TPMS malfunction indicator is
combined with the low tire pressure telltale. When the
system detects a malfunction, the telltale will flash for
approximately one minute and then remain continuously
4
UNDERSTANDING YOUR INSTRUMENT PANEL 315
illuminated. This sequence will continue upon subse-
quent vehicle start-ups as long as the malfunction exists.
When the malfunction indicator is illuminated, the sys-
tem may not be able to detect or signal low tire pressure
as intended. TPMS malfunctions may occur for a variety
of reasons, including the installation of replacement or
alternate tires or wheels on the vehicle that prevent the
TPMS from functioning properly. Always check the
TPMS malfunction telltale after replacing one or more
tires or wheels on your vehicle, to ensure that the
replacement or alternate tires and wheels allow the TPMS
to continue to function properly.CAUTION!
The TPMS has been optimized for the original
equipment tires and wheels. TPMS pressures and
warning have been established for the tire size
equipped on your vehicle. Undesirable system opera-
tion or sensor damage may result when using re-
placement equipment that is not of the same size,
type, and/or style. Aftermarket wheels can cause
sensor damage. Using aftermarket tire sealants may
cause the Tire Pressure Monitoring System (TPMS)
sensor to become inoperable. After using an after-
market tire sealant it is recommended that you take
your vehicle to an authorized dealership to have your
sensor function checked.
316 UNDERSTANDING YOUR INSTRUMENT PANEL
▫Electronic Brake Force Distribution (EBD). . . .619
▫Brake System Warning Light..............619
▫Anti-Lock Brake System (ABS)............620
▫Anti-Lock Brake Warning Light............621
▫Brake Assist System (BAS)...............622
▫Hill Start Assist (HSA).................622
▫Traction Control System (TCS)............625
▫Electronic Stability Control (ESC)..........626
▫Electronic Roll Mitigation (ERM)..........631
▫Trailer Sway Control (TSC)..............632
▫Hill Descent Control (HDC) — If Equipped . . .632
TIRE SAFETY INFORMATION.............636
▫Tire Markings........................636▫Tire Identification Number (TIN)...........639
▫Tire Terminology And Definitions..........641
▫Tire Loading And Tire Pressure...........642
TIRES — GENERAL INFORMATION........647
▫Tire Pressure........................647
▫Tire Inflation Pressures.................648
▫Tire Pressures For High Speed Operation. . . .650
▫Radial Ply Tires......................650
▫Tire Types...........................651
▫Run Flat Tires — If Equipped.............653
▫Spare Tires — If Equipped...............653
▫Tire Spinning........................656
▫Tread Wear Indicators..................656
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STARTING AND OPERATING 473
▫Life Of Tire.........................657
▫Replacement Tires.....................657
SUPPLEMENTAL TIRE PRESSURE INFORMATION
— IF EQUIPPED.......................659
TIRE CHAINS (TRACTION DEVICES).......659
TIRE ROTATION RECOMMENDATIONS.....662
▫Directional Tires — If Equipped...........663
▫Dual Rear Wheels — If Equipped..........663
TIRE PRESSURE MONITOR SYSTEM (TPMS) . .665
▫Premium System......................667
▫Tire Pressure Information System (TPIS) 3500
Series Trucks.........................672
▫General Information...................674
FUEL REQUIREMENTS..................674▫3.6L Engine..........................674
▫5.7L Engine..........................675
▫6.4L Engine..........................675
▫Reformulated Gasoline.................676
▫Gasoline/Oxygenate Blends..............676
▫E-85 Usage In Non-Flex Fuel Vehicles.......677
▫MMT In Gasoline.....................677
▫Materials Added To Fuel................678
▫Fuel System Cautions...................678
▫Carbon Monoxide Warnings.............679
FLEXIBLE FUEL (3.6L ENGINE ONLY) — IF
EQUIPPED...........................680
▫E-85 General Information...............680
474 STARTING AND OPERATING
This transfer case is intended to be driven in the 2H
position for normal street and highway conditions such
as dry, hard surfaced roads.
When additional traction is required, the 4H and 4L
positions can be used to lock the front and rear drive-
shafts together and force the front and rear wheels to
rotate at the same speed. This is accomplished by simply
moving the shift lever to the desired positions once the
appropriate speed and gear requirements are met, refer
to “Shifting Procedure – Manually Shifted Transfer Case”
in this section for further information.
The 4H and 4L positions are intended for loose, slippery
road surfaces only. Driving in the 4H and 4L positions on
dry, hard surfaced roads may cause increased tire wear
and damage to the driveline components.
The “Transfer Case Position Indicator Light” in the
instrument cluster will alert the driver that the vehicle isin four-wheel drive and that the front and rear drive-
shafts are locked together. This light will illuminate when
the transfer case is shifted into either the 4H or 4L
position. There is no light for the 2H or NEUTRAL
positions on some models.
When operating your vehicle in 4L, the engine speed is
approximately three times that of the 2H or 4H positions
at a given road speed. Take care not to overspeed the
engine and do not exceed 25 mph (40 km/h).
Proper operation of four-wheel drive vehicles depends
on tires of equal size, type and circumference on each
wheel. Any difference will adversely affect shifting and
can cause damage to the drivetrain.
NOTE:Do not attempt to make a shift while only the
front or rear wheels are spinning. The front and rear
driveshaft speeds must be equal for the shift to take
place. Shifting while only the front or rear wheels are
spinning can cause damage to the transfer case.
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STARTING AND OPERATING 523
WARNING!
Always engage the parking brake when powering
down the vehicle if the “SVC 4WD Warning Light” is
illuminated. Not engaging the parking brake may
allow the vehicle to roll, which may cause personal
injury.
NOTE:Do not attempt to make a shift while only the
front or rear wheels are spinning, as this can cause
damage to driveline components.
When operating your vehicle in 4WD LOW, the engine
speed is approximately three times that of the 2WD or
4WD LOCK positions at a given road speed. Take care
not to overspeed the engine and do not exceed 25 mph
(40 km/h).Proper operation of four-wheel drive vehicles depends
on tires of equal size, type and circumference on each
wheel. Any difference in tire size can cause damage to the
drivetrain.
Because four-wheel drive provides improved traction,
there is a tendency to exceed safe turning and stopping
speeds. Do not go faster than road conditions permit.
WARNING!
You or others could be injured or killed if you leave
the vehicle unattended with the transfer case in the
NEUTRAL position without first fully engaging the
parking brake. The transfer case NEUTRAL position
disengages both the front and rear drive shafts from
the powertrain and will allow the vehicle to roll,
even if the transmission is in PARK. The parking
brake should always be applied when the driver is
not in the vehicle.
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STARTING AND OPERATING 529