2021 RAM CHASSIS CAB fuel type

5
LANESENSE — IF EQUIPPED ........................... 183 LaneSense Operation ................................183Turning LaneSense On Or Off ...................184LaneSense Warning Message ..................184
Changing LaneSense Status .....................186
PARKVIEW REAR BACK UP CAMERA ............ 186
AUX Camera — If Equipped .......................188
SURROUND VIEW CAMERA SYSTEM — IF
EQUIPPED ........................................................... 189
AUX Camera — If Equipped .......................194
ENGINE RUNAWAY ............................................ 195
REFUELING THE VEHICLE — GASOLINE
ENGINE ................................................................ 195
Loose Fuel Filler Cap Message ................196
REFUELING THE VEHICLE — DIESEL
ENGINE ............................................................... 196
Diesel Exhaust Fluid ..................................196
VEHICLE LOADING ............................................ 199
Gross Vehicle Weight Rating (GVWR) ......199Payload .......................................................199Gross Axle Weight Rating (GAWR) ............200
Tire Size ......................................................200
Rim Size......................................................200
Inflation Pressure ......................................200
Curb Weight................................................200
Loading .......................................................200 TRAILER TOWING ............................................... 200
Common Towing Definitions ..................... 201Trailer Hitch Type and Maximum Trailer
Weight ........................................................ 204 Trailer Towing Weights (Maximum Trailer
Weight Ratings) ......................................... 205 Trailer And Tongue Weight ....................... 205
Towing Requirements ............................... 205Towing Tips ................................................ 211
SNOWPLOW — IF EQUIPPED ............................ 212
Before Plowing ........................................... 212
Snowplow Prep Package Model
Availability .................................................. 212 Over The Road Operation With Snowplow
Attached ..................................................... 213 Operating Tips ............................................ 213General Maintenance................................ 213
RECREATIONAL TOWING (BEHIND
MOTORHOME) ...................................................214
Towing This Vehicle Behind Another
Vehicle ........................................................ 214 Recreational Towing — Two-Wheel Drive
Models ........................................................ 215 Recreational Towing — Four-Wheel Drive
Models ........................................................ 215
DRIVING TIPS ...................................................... 218
Driving On Slippery Surfaces ................... 218
Driving Through Water .............................. 218
MULTIMEDIA
UCONNECT SYSTEMS ....................................... 220
CYBERSECURITY ............................................... 220
UCONNECT 3.0 ................................................... 221 Introduction................................................ 221
Radio Mode ................................................ 222
Media Mode ............................................... 224
Phone Mode............................................... 225
UCONNECT SETTINGS ....................................... 228
Customer Programmable Features .......... 228
UCONNECT INTRODUCTION.............................. 244
System Overview ...................................... 244
Safety And General Information ............... 246
UCONNECT MODES ........................................... 247
Steering Wheel Audio Controls ................. 247
Radio Mode ............................................... 247
Media Mode .............................................. 255Phone Mode .............................................. 258
RADIO OPERATION AND MOBILE PHONES.... 269
Regulatory And Safety Information .......... 269
OFF-ROAD PAGES — IF EQUIPPED .................. 270
Off-Road Pages Status Bar ....................... 270Vehicle Dynamics ...................................... 271
Accessory Gauge ....................................... 271
Pitch & Roll................................................. 272Forward Facing Camera ............................ 272

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7
Underbody Mounted Fuel Filter
Replacement ..............................................377 Priming If The Engine Has Run Out
Of Fuel .......................................................378 Intervention Regeneration Strategy —
Message Process Flow .............................379 Diesel Exhaust Fluid ..................................379Body Lubrication ........................................380
Windshield Wiper Blades ..........................380
Exhaust System ........................................382
Cooling System .........................................383
Charge Air Cooler — Inter-Cooler ..............386
Brake System ............................................387
Automatic Transmission ............................387
Rear Axle And 4x4 Front Driving Axle
Fluid Level .................................................. 390 Transfer Case ............................................391
Noise Control System Required
Maintenance & Warranty .........................391
TIRES ................................................................... 406
Tire Safety Information .............................406Tires — General Information .....................414 Tire Types ................................................... 418
Spare Tires — If Equipped ......................... 419
Wheel And Wheel Trim Care .................... 421
Snow Traction Devices ............................. 422
Tire Rotation Recommendations .............. 424
DEPARTMENT OF TRANSPORTATION UNIFORM
TIRE QUALITY GRADES .....................................425
Treadwear .................................................. 426
Traction Grades ......................................... 426
Temperature Grades ................................. 426
STORING THE VEHICLE .....................................427
BODYWORK ........................................................ 427
Protection From Atmospheric Agents....... 427
Body And Underbody Maintenance .......... 427Preserving The Bodywork .......................... 428
INTERIORS ......................................................... 428
Seats And Fabric Parts .............................. 428
Plastic And Coated Parts ........................... 429
Leather Surfaces ....................................... 430Glass Surfaces .......................................... 430
TECHNICAL SPECIFICATIONS
VEHICLE IDENTIFICATION NUMBER (VIN) ..... 431
BRAKE SYSTEM ................................................ 431
Hydraulic Brake Assist — If Equipped....... 431
WHEEL AND TIRE TORQUE
SPECIFICATIONS ................................................ 432
Torque Specifications................................ 432
FUEL REQUIREMENTS — GASOLINE
ENGINE ................................................................ 433
6.4L Engine ................................................ 433
Reformulated Gasoline ............................ 433Materials Added To Fuel ........................... 434
Gasoline/Oxygenate Blends .................... 434Do Not Use E-85 In Non-Flex Fuel
Vehicles ...................................................... 434 CNG And LP Fuel System Modifications .. 435Methylcyclopentadienyl Manganese
Tricarbonyl (MMT) In Gasoline .................. 435 Fuel System Cautions................................ 435

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94GETTING TO KNOW YOUR INSTRUMENT PANEL
Fuel Economy
Push and release the up or down arrow
button until the Fuel Economy menu item is
highlighted in the instrument cluster display.
Push and Hold the right arrow button to reset
Average Fuel Economy.
Current Fuel Economy Gauge
Average Fuel Economy Value
Range To Empty
Fuel Tank Levels — If Equipped
Trip A/Trip B
Push and release the up or down arrow
button until the Trip menu item is highlighted
in the instrument cluster display. Push and
release the right arrow button to enter the
submenus of Trip A and Trip B. The Trip A or Trip
B information will display the following:
Distance
Average Fuel Economy
Elapsed Time
Push and hold right arrow button to reset all
information.
Trailer Tow
Push and release the up or down arrow
button until the Trailer Tow menu item is
highlighted in the instrument cluster display.
Push and release the right or left arrow
button to cycle through the following trailer tow
information:
Trip (trailer specific) Distance: Push and hold
the OK button to reset the distance.
Integrated Trailer Brake Module (ITBM):
Braking Output
Trailer Type
ITBM Gain
Trailer Light Check: Push and hold the
OK button to begin the Trailer Light Test
sequence Ú page 209.
Trailer Tire Pressure Monitoring: The Instru-
ment Cluster Display will display the Trailer
Tire Pressure for a connected trailer with
sensors that match the active trailer profile.
When a low tire is present, the low tire value
will be displayed in red, and the affected low tire will have a red glow. “Trailer Tire Low“ will
be displayed on the center bottom of the
Instrument Cluster Display screen.
Audio
Push and release the
up or down arrow
button until the Audio Menu icon/title is
highlighted in the instrument cluster display.
This menu will display the audio source
information, including the Song name, Artist
name, and audio source with an accompanying
graphic.
Phone Call Status
When a call is incoming, a Phone Call Status
pop-up will display on the screen. The pop-up
will remain until the phone is answered or
ignored.
NOTE:
The call status will temporarily replace the
previous media source information displayed
on the screen. When the pop-up is no longer
displayed, the display will return to the last used
screen.

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112GETTING TO KNOW YOUR INSTRUMENT PANEL
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 TPMS that illuminates
a low tire pressure telltale when one or more
of your tires is significantly underinflated.
Accordingly, 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 significantly underinflated 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 illuminated. This sequence will
continue upon subsequent vehicle start-ups
as long as the malfunction exists. When the
malfunction indicator is illuminated, the system
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!
Do not continue driving with one or more
flat tires as handling may be compromised.
Stop the vehicle, avoiding sharp braking and
steering. If a tire puncture occurs, repair
immediately using the dedicated tire repair
kit and contact an authorized dealer as soon
as possible.
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 operation or sensor damage may
result when using replacement 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
aftermarket tire sealant it is recommended
that you take your vehicle to an authorized
dealer to have your sensor function checked.

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STARTING AND OPERATING121
If the driver shifts into PARK while moving, the
vehicle may AutoPark.
AutoPark will engage ONLY when vehicle speed
is 1.2 mph (1.9 km/h) or less.
The message “ Vehicle Speed is Too High to
Shift to P ” will be displayed in the instrument
cluster if vehicle speed is above 1.2 mph
(1.9 km/h).
4WD Low — If Equipped
AutoPark will be disabled when operating the
vehicle in 4WD LOW.
The message “ AutoPark Disabled ” will be
displayed in the instrument cluster. Additional customer warnings will be given
when all of these conditions are met:
Vehicle is not in PARK
Driver’s door is ajar
Vehicle is in 4WD Low range
The message “ AutoPark Not Engaged ” will be
displayed in the instrument cluster. A warning
chime will continue until you shift the vehicle
into PARK or the driver’s door is closed.
ALWAYS DO A VISUAL CHECK
that your vehicle
is in PARK by looking for the “P” in the
instrument cluster display and near the shifter.
As an added precaution, always apply the
parking brake when exiting the vehicle.
If Engine Fails To Start
If the engine fails to start after you have
followed the “Normal Starting” procedure, it
may be flooded. Push the accelerator pedal all
the way to the floor and hold it there while the
engine is cranking. This should clear any excess
fuel in case the engine is flooded. The starter motor will engage automatically, run
for 10 seconds, and then disengage. Once this
occurs, release the accelerator pedal and the
brake pedal, wait 10 to 15 seconds, then repeat
the “Normal Starting” procedure.
WARNING!
If vehicle speed is above 1.2 mph (1.9 km/h),
the transmission will default to NEUTRAL until
the vehicle speed drops below 1.2 mph
(1.9 km/h). A vehicle left in the NEUTRAL
position can roll. As an added precaution,
always apply the parking brake when exiting
the vehicle.
WARNING!
Never pour fuel or other flammable liquid
into the throttle body air inlet opening in
an attempt to start the vehicle. This could
result in flash fire causing serious personal
injury.
Do not attempt to push or tow your vehicle
to get it started. Vehicles equipped with an
automatic transmission cannot be started
this way. Unburned fuel could enter the
catalytic converter and once the engine has
started, ignite and damage the converter
and vehicle.
If the vehicle has a discharged battery,
booster cables may be used to obtain a
start from a booster battery or the battery in
another vehicle. This type of start can be
dangerous if done improperly
Úpage 345.
4

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STARTING AND OPERATING195
ENGINE RUNAWAY
Diesel engine runaway is a rare condition
affecting diesel engines, where the engine
consumes its own lubrication oil and runs at
higher and higher RPM until it overspeeds to
a point where it destroys itself due to either
mechanical failure or engine seizure through
lack of lubrication.
REFUELING THE VEHICLE — GASOLINE
ENGINE
NOTE:
When the fuel nozzle “clicks” or shuts off the
fuel tank is full. NOTE:
Tighten the gas cap a quarter turn until you hear
one click. This is an indication that the cap is
properly tightened.
If the gas cap is not tightened properly, the
Malfunction Indicator Light will come on.
Be sure the gas cap is tightened every time the
vehicle is refueled.
WARNING!
In case of engine runaway due to flammable
fumes from fuel spills or turbocharger oil
leaks being sucked into the engine, do the
following to help avoid personal injury and/or
vehicle damage:
Turn the ignition switch to the OFF position.

Using a CO2 or dry chemical type fire extin
-
guisher, direct the spray from the fire extin -
guisher into the grille on the passenger side so
that the spray enters the engine air intake.

The inlet for the engine air intake is located
behind the passenger side headlamp and
receives air through the grille.
CAUTION!
Damage to the fuel system or emissions
control system could result from using an
improper fuel tank filler tube cap (fuel filler
cap). A poorly fitting cap could let impurities
into the fuel system. Also, a poorly-fitted
aftermarket cap can cause the MIL
(Malfunction Indicator Light) to illuminate
due to fuel vapors escaping from the
system.
A poorly fitting fuel filler cap may cause the
MIL to turn on.
To avoid fuel spillage and overfilling, do not
“top off” the fuel tank after filling.
WARNING!
Never have any smoking materials lit in
or near the vehicle when the gas cap is
removed or the tank is being filled.
Never add fuel to the vehicle when the
engine is running. This is in violation of
most state and federal fire regulations and
may cause the MIL to turn on.
WARNING!
A fire may result if gasoline is pumped into a
portable container that is inside of a vehicle.
You could be burned. Always place gas
containers on the ground while filling.
4

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STARTING AND OPERATING197
NOTE:

Your vehicle is equipped with a DEF injection
system. You may occasionally hear an audible
clicking noise. This is normal operation.

The DEF pump will run for a period of time
after engine shutdown to purge the DEF
system. This is normal operation.
Diesel Exhaust Fluid Storage

Diesel Exhaust Fluid (DEF) is considered a very
stable product with a long shelf life. If DEF is kept
in temperatures between 10° and 90°F (-12°
and 32°C), it will last a minimum of one year.

DEF is subject to freezing at the lowest
temperatures. For example, DEF may freeze
at temperatures at or below 12°F (-11°C).
The system has been designed to operate in
this environment.
NOTE:

When working with DEF, it is important to know that:

Any containers or parts that come into contact
with DEF must be DEF compatible (plastic or
stainless steel). Copper, brass, aluminum, iron or non-stainless steel should be avoided as
they are subject to corrosion by DEF.

If DEF is spilled, it should be wiped up
completely.
Adding Diesel Exhaust Fluid (DEF)
The DEF gauge (located on the instrument
cluster) will display the level of DEF remaining in
the tank Ú
page 90.
NOTE:
Driving conditions (altitude, vehicle speed,
load, etc.) will effect the amount of DEF that
is used in your vehicle.
Another factor is that outside temperature
can affect DEF consumption. In cold condi -
tions, 12°F (-11°C) and below, the DEF
gauge needle can stay on a fixed position and
may not move for extended periods of time.
This is a normal function of the system.
There is an electric heater inside the DEF
tank that automatically works when neces -
sary. And if the DEF supply does freeze, the
truck will operate normally until it thaws. DEF Fill Procedure
NOTE:
For the correct fluid type Ú
page 440.
Remove cap from DEF tank (located on drivers
side of the vehicle or in fuel door).

DEF Filler Cap And Fuel Fill Chassis Cab Models

1 — Diesel Exhaust Fluid (DEF) Fill Location
2 — Diesel Fuel Fill Location
4

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200STARTING AND OPERATING
GROSS AXLE WEIGHT RATING (GAWR)
The GAWR is the maximum permissible load
on the front and rear axles. The load must be
distributed in the cargo area so that the GAWR
of each axle is not exceeded.

Each axle GAWR is determined by the
components in the system with the lowest load
carrying capacity (axle, springs, tires or wheels).
Heavier axles or suspension components
sometimes specified by purchasers for increased
durability does not necessarily increase the
vehicle's GVWR.

TIRE SIZE
The tire size on the Vehicle Certification Label
represents the actual tire size on your vehicle.
Replacement tires must be equal to the load
capacity of this tire size.
RIM SIZE
This is the rim size that is appropriate for the tire
size listed.
INFLATION PRESSURE

This is the cold tire inflation pressure for your
vehicle for all loading conditions up to full GAWR.

CURB WEIGHT

The curb weight of a vehicle is defined as the
total weight of the vehicle with all fluids, including
vehicle fuel, at full capacity conditions, and with
no occupants or cargo loaded into the vehicle.
The front and rear curb weight values are
determined by weighing your vehicle on a
commercial scale before any occupants or
cargo are added.

LOADING
The actual total weight and the weight of the
front and rear of your vehicle at the ground can
best be determined by weighing it when it is
loaded and ready for operation.
The entire vehicle should first be weighed on a
commercial scale to ensure that the GVWR has
not been exceeded. The weight on the front and
rear of the vehicle should then be determined
separately to be sure that the load is properly
distributed over the front and rear axles.
Weighing the vehicle may show that the GAWR
of either the front or rear axle has been
exceeded but the total load is within the
specified GVWR. If so, weight must be shifted
from front to rear or rear to front as appropriate
until the specified weight limitations are met. Store the heavier items down low and be sure
that the weight is distributed equally. Stow all
loose items securely before driving.
Improper weight distributions can have an
adverse effect on the way your vehicle steers
and handles and the way the brakes operate.
TRAILER TOWING
In this section you will find safety tips and
information on limits to the type of towing you
can reasonably do with your vehicle. Before
towing a trailer, carefully review this information
to tow your load as efficiently and safely as
possible.
To maintain the New Vehicle Limited Warranty
coverage, follow the requirements and
recommendations in this manual concerning
vehicles used for trailer towing.
CAUTION!

Do not load your vehicle any heavier than the
GVWR or the maximum front and rear GAWR. If
you do, parts on your vehicle can break, or it
can change the way your vehicle handles.
This could cause you to lose control. Also
overloading can shorten the life of your vehicle.

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