2008 DODGE RAM 3500 GAS tire size

²Brake status (service and parking brakes)
²Accelerator status (including vehicle speed)
²Engine control status (including engine speed)
²Transmission gear selection
²Cruise control status
²Traction/stability control status
²Tire pressure monitoring system (TPMS) status (if
equipped)
Child Restraint
Everyone in your vehicle needs to be buckled up all the
time Ð babies and children, too. Every state in the United
States and all Canadian provinces require that small
children ride in proper restraint systems. This is the law,
and you can be prosecuted for ignoring it.Children 12 years and younger should ride properly
buckled up in a rear seat, if available. According to crash
statistics, children are safer when properly restrained in
the rear seats rather than in the front.
WARNING!
In a collision, an unrestrained child, even a tiny baby,
can become a missile inside the vehicle. The force
required to hold even an infant on your lap can
become so great that you could not hold the child, no
matter how strong you are. The child and others
could be badly injured. Any child riding in your
vehicle should be in a proper restraint for the child's
size.
62 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

24. ESP/BAS Warning Lamp ± If Equipped
The lamp indicates a problem with one or more
of the functions of ESP. The yellow ªESP/BAS
Warning Lampº in the instrument cluster
comes on when the ignition switch is turned to
the ON position as a bulb check. It should go out with the
engine running. If the ªESP/BAS Warning Lampº comes
on continuously with the engine running, a malfunction
has been detected in the ESP system. If this light remains
on after several ignition cycles, and the vehicle has been
driven several miles/kilometers at speeds greater than 30
mph (48 km/h), see your authorized dealer as soon as
possible.
NOTE:9The9ESP/BAS Warning Lamp9come on mo-
mentarily each time the ignition switch is turned ON.
The ESP Control System will make buzzing or clicking
sounds when it is actively operating.25. Tire Pressure Monitoring Telltale Light Ð If
Equipped
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. Accord-
ingly, when the low tire pressure telltale illuminates, you
should stop and check your tires as soon as possible, and
inflate them to the proper pressure. Driving on a signifi-
cantly under inflated tire causes the tire to overheat and
204 UNDERSTANDING YOUR INSTRUMENT PANEL

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. Do not use tire sealant from a can, or
balance beads if your vehicle is equipped with a
TPMS, as damage to the sensors may result.
TPMS ªLight Loadº Reset Switch ± If Equipped
The TPMS ºLight Loadº reset switch allows you to
choose between Light Load vehicle conditions and Max
Load vehicle conditions tire pressures and related TPMS
warning levels. The switch is located in the instrumentpanel, below the climate control panel. For additional
information refer to ªTire Pressure Monitoring System
(TPMS) Ð If Equippedº in section 5 of this manual.
26. Electronic Stability Program (ESP) Indicator Light
Ð If Equipped
This lamp indicates the ESP system is active
when it is flashing or that a part, or all, of the
features of the ESP system are not able to func-
tion when it is on solid. The yellow ªESP Indi-
cator Lightº is located in the tachometer area. The9ESP/
TCS Indicator Light9starts to flash as soon as the tires lose
traction and the ESP system becomes active. The9ESP/TCS
Indicator Light9also flashes when TCS is active. If the
9ESP/TCS Indicator Light9begins to flash during accelera-
tion, ease up on the accelerator and apply as little throttle
as possible. Be sure to adapt your speed and driving to the
prevailing road conditions. The ªESP/TCS Indicator Lightº
becomes illuminated when the ESP-OFF button has been
pressed or ESP is only partially available.
206 UNDERSTANDING YOUR INSTRUMENT PANEL

The 4-wheel drive light (4WD), located in the instrument
cluster, alerts the driver that the vehicle is in 4-wheel
drive and that the front and rear driveshafts are locked
together. This light illuminates when the transfer case is
shifted to either the 4H or 4L positions. There is no light
for the 2H or NEUTRAL positions.
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 4-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 transfer case.NOTE:Do not attempt to make a shift while only the
front or rear wheels are spinning. The transfer case is not
equipped with a synchronizer and therefore 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.
Because 4-wheel drive provides improved traction, there
is a tendency to exceed safe turning and stopping speeds.
Do not go faster than road conditions permit.
NOTE:Delayed shifts out of four-wheel drive may be
experienced due to uneven tire wear, low or uneven tire
pressures, excessive vehicle loading, or cold tempera-
tures.
STARTING AND OPERATING 295
5

When operating your vehicle in 4WD LO, the engine
speed is approximately three times that of the 2WD, 4WD
AUTO or 4WD HI 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 4-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
transfer case.
Because 4-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 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 driveshafts from
the powertrain and will allow the vehicle to move
regardless of the transmission position. The parking
brake should always be applied when the driver is
not in the vehicle.
302 STARTING AND OPERATING

WARNING!
Always engage the parking brake when powering
down the vehicle if the(SERVICE 4WD(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 4-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
transfer case.
Because 4-wheel drive provides improved traction, there
is a tendency to exceed safe turning and stopping speeds.
Do not go faster than road conditions permit.
STARTING AND OPERATING 309
5

TIRE SAFETY INFORMATION
TIRE MARKINGS
NOTE:
²P (Passenger) - Metric tire sizing is based on U.S.
design standards. P-Metric tires have the letter ªPº
molded into the sidewall preceding the size designa-
tion. Example: P215/65R15 95H.
²European-Metric tire sizing is based on European
design standards. Tires designed to this standard have
the tire size molded into the sidewall beginning with
the section width. The letter9P9is absent from this tire
size designation. Example: 215/65R15 96H.
²LT (Light Truck) - Metric tire sizing is based on U.S.
design standards. The size designation for LT-Metric
tires is the same as for P-Metric tires except for the
letters ªLTº that are molded into the sidewall preced-
ing the size designation. Example: LT235/85R16.
²Temporary spare tires are high-pressure compact
spares designed for temporary emergency use only.
Tires designed to this standard have the letter ªTº
molded into the sidewall preceding the size designa-
tion. Example: T145/80D18 103M.
²High flotation tire sizing is based on U.S. design
standards, and it begins with the tire diameter molded
into the sidewall. Example: 31x10.5 R15 LT.
STARTING AND OPERATING 339
5

Tire Sizing Chart
TIRE SIZING TERMS
Size Designation:
P= Passenger Car tire size based on U.S. design standards
(....blank....(= Passenger Car tire based on European design standards
LT= Light Truck tire based on U.S. design standards
T= Temporary spare tire
31= Overall diameter in inches (in)
215= Section width in millimeters (mm)
65= Aspect ratio in percent (%)
Ð Ratio of section height to section width of tire
10.5= Section width in inches (in)
R= Construction code
Ð9R9means radial construction
Ð9D9means diagonal or bias construction
15= Rim diameter in inches (in)
340 STARTING AND OPERATING