2021 RAM 1500 tire type

6
VEHICLE LOADING ............................................. 213 Gross Vehicle Weight Rating (GVWR) ......213Payload .......................................................213Gross Axle Weight Rating (GAWR) ............213
Tire Size ......................................................213
Rim Size......................................................214
Inflation Pressure ......................................214
Curb Weight................................................214
Loading .......................................................214
TRAILER TOWING .............................................. 214
Common Towing Definitions .....................214Trailer Hitch Type and Maximum Trailer
Weight.........................................................218 Trailer Towing Weights (Maximum Trailer
Weight Ratings) ..........................................218 Trailer And Tongue Weight ........................ 219Trailer Reverse Steering Control ...............219
Towing Requirements ...............................221
Towing Tips ................................................227
SNOWPLOW ...................................................... 227
Before Plowing ........................................... 228
Snowplow Prep Package Model
Availability .................................................. 228 Over The Road Operation With Snowplow
Attached .....................................................229 Operating Tips ............................................229
General Maintenance ................................229 RECREATIONAL TOWING (BEHIND
MOTORHOME) ...................................................230
Towing This Vehicle Behind Another
Vehicle ........................................................ 230 Recreational Towing — Two-Wheel Drive
Models ........................................................ 230 Recreational Towing — Four-Wheel Drive
Models ........................................................ 231
DRIVING TIPS ...................................................... 234
Driving On Slippery Surfaces ................... 234
Driving Through Water .............................. 234
Off-Road Driving Tips ................................. 235
MULTIMEDIA
UCONNECT SYSTEMS .......................................236
CYBERSECURITY ............................................... 236
UCONNECT SETTINGS ........................................ 237Customer Programmable Features .......... 237
HEAD-UP DISPLAY (HUD) .................................. 254
UCONNECT INTRODUCTION ..............................256
System Overview ....................................... 256Safety And General Information ............... 258
UCONNECT MODES ............................................259
Steering Wheel Audio Controls ................ 259
Radio Mode ............................................... 259Media Mode .............................................. 268
Phone Mode .............................................. 271 CONNECTED VEHICLE SERVICES —
IF EQUIPPED ...................................................... 282
Is My Vehicle Connected? ......................... 282
Introduction To Connected Vehicle
Services ..................................................... 282 Getting Started With Connected Vehicle
Services ..................................................... 284 Using SiriusXM Guardian™ ...................... 286
Manage My SiriusXM Guardian™
Account ...................................................... 301
CONNECTED SERVICES FAQs ......................... 301
Connected Services SOS FAQs ................ 301
Connected Services Remote Door Lock/
Unlock FAQs .............................................. 302 Connected Services Roadside
Assistance FAQs ....................................... 302 Connected Services Send & Go FAQs ..... 302Connected Services Vehicle Finder
FAQs .......................................................... 303 Connected Services Stolen Vehicle
Assistance FAQs ....................................... 303 Connected Services Remote Vehicle
Start FAQs ................................................. 303 Connected Services Remote Horn &
Lights FAQs ................................................ 304 Connected Services Account FAQs........... 304
Data Collection & Privacy .......................... 306

21_DT_OM_EN_USC_t.book Page 6

8
VEHICLE MAINTENANCE .................................. 409 Engine Oil — Gas Engine ...........................410
Engine Oil Filter ..........................................410Engine Air Cleaner Filter ............................411
Draining Fuel/Water Separator Filter —
Diesel Engine ............................................412 Underbody Mounted Fuel Filter
Replacement — Diesel Engine ..................413 Priming If The Engine Has Run Out Of
Fuel — Diesel Engine .................................414 Intervention Regeneration Strategy —
Message Process Flow (Diesel Engine) ....414 Diesel Exhaust Fluid ..................................415Air Conditioner Maintenance ....................415
Accessory Drive Belt Inspection................417Body Lubrication ........................................418
Windshield Wiper Blades ..........................418
Exhaust System ........................................420
Cooling System .........................................421
Charge Air Cooler — Inter-Cooler (Diesel
Engine)........................................................ 424 Brake System ............................................425
Automatic Transmission ...........................426
Rear Axle And 4x4 Front Driving Axle
Fluid Level .................................................426 Transfer Case ............................................427
FUSES .........................................................427
BULB REPLACEMENT ................................437 TIRES....................................................................443
Tire Safety Information .............................. 443
Tires — General Information ..................... 449Tire Types ................................................... 454
Spare Tires — If Equipped ......................... 455
Wheel And Wheel Trim Care ..................... 456Snow Traction Devices .............................. 458
Tire Rotation Recommendations ............. 460
DEPARTMENT OF TRANSPORTATION
UNIFORM TIRE QUALITY GRADES .................. 460
Treadwear .................................................. 460
Traction Grades ......................................... 461
Temperature Grades ................................. 461
STORING THE VEHICLE ......................................461
BODYWORK ........................................................ 461
Protection From Atmospheric Agents....... 461
Body And Underbody Maintenance .......... 462Preserving The Bodywork .......................... 462
INTERIORS ......................................................... 464
Seats And Fabric Parts .............................. 464
Plastic And Coated Parts ........................... 465
Leather Surfaces ....................................... 465Glass Surfaces .......................................... 466
TECHNICAL SPECIFICATIONS
VEHICLE IDENTIFICATION NUMBER ................ 467
BRAKE SYSTEM ................................................ 467
WHEEL AND TIRE TORQUE
SPECIFICATIONS ................................................ 467
Torque Specifications ............................... 467
FUEL REQUIREMENTS — GASOLINE
ENGINE ............................................................... 468
3.6L Engine ............................................... 468
5.7L Engine ................................................ 469
Reformulated Gasoline ............................. 469
Materials Added To Fuel ........................... 469
Gasoline/Oxygenate Blends ..................... 469
Do Not Use E-85 In Non-Flex Fuel
Vehicles ...................................................... 470 CNG And LP Fuel System Modifications .. 470Methylcyclopentadienyl Manganese
Tricarbonyl (MMT) In Gasoline .................. 470 Fuel System Cautions................................ 470
FUEL REQUIREMENTS – DIESEL ENGINE ....... 471
Diesel Fuel Specifications......................... 471
Biodiesel Fuel Requirements.................... 472
FLUID CAPACITIES ............................................ 474
ENGINE FLUIDS AND LUBRICANTS ................ 475
CHASSIS FLUIDS AND LUBRICANTS ............... 478

21_DT_OM_EN_USC_t.book Page 8

118GETTING TO KNOW YOUR INSTRUMENT PANEL
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 225.
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.
Stored Messages
Push and release the up or down arrow
button until the Messages Menu item is
highlighted. This feature shows the number of
stored warning messages. Push and release the
right or left arrow button to cycle through
stored messages.
Settings
Head-Up Display (HUD)
NOTE:
The HUD feature Settings are available at any
vehicle speed.
Push and release the up or down arrow
button until the Settings Menu icon/title is
highlighted in the instrument cluster display.
Push and release the left or right arrow
button until the HUD Menu icon/title is
highlighted in the instrument cluster
display.Push and release the OK button to enter
HUD. Use the up or down arrow button to
select a setting, then push and release the OK
button to adjust the setting.
ON/OFF
Content and Layout
Simple : Speed, Speed Limit
Standard : Speed, Speed Limit, Naviga-
tion
Advanced : Speed, Speed Limit, Naviga-
tion, Driver Assist (ACC/Cruise, Lane -
Sense, Highway Assist/Highway Assist+),
Gear

21_DT_OM_EN_USC_t.book Page 118

132GETTING TO KNOW YOUR INSTRUMENT PANEL
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.
Anti-Lock Brake System (ABS) Warning
Light
This warning light monitors the ABS.
The light will turn on when the ignition
is placed in the ON/RUN or ACC/ON/
RUN position and may stay on for as
long as four seconds.If the ABS light remains on or turns on while
driving, then the Anti-Lock portion of the brake
system is not functioning and service is
required as soon as possible. However, the
conventional brake system will continue to
operate normally, assuming the Brake Warning
Light is not also on.
If the ABS light does not turn on when the
ignition is placed in the ON/RUN or ACC/ON/
RUN position, have the brake system inspected
by an authorized dealer.
Rear Axle Locker Fault Indicator Light — If
Equipped
This warning light will illuminate to
indicate when a rear axle locker fault
has been detected.
Service Forward Collision Warning (FCW)
Light — If Equipped
This warning light will illuminate to
indicate a fault in the FCW System.
Contact an authorized dealer for
service Ú
page 324.
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.

21_DT_OM_EN_USC_t.book Page 132

162STARTING AND OPERATING
NOTE:
The 4WD High and 4WD Low positions are
designed for loose, slippery road surfaces
only. Driving in the 4WD High and 4WD Low
positions on dry, hard surfaced roads may
cause increased tire wear and damage to the
driveline components.
The transfer case N (Neutral) button is located
in the center of the 4WD Control Switch and is
pushed by using a ballpoint pen or similar
object. The transfer case N (Neutral) position
is to be used for recreational towing only
Úpage 231.
Transfer Case Position Indicator Lights
The Transfer Case Position Indicator Lights
(4WD High and 4WD Low) are located in the
instrument cluster and indicate the current and
desired transfer case selection. When you
select a different transfer case position, the
indicator lights will do the following:

1. The current position indicator light will turn off.

2. The selected position indicator light will flash until the transfer case completes the
shift. 3. When the shift is complete, the indicator
light for the selected position will stop
flashing and remain on.
If the transfer case does not shift into the
desired position, one or more of the following
events may occur:

1. The indicator light for the current position will remain on.

2. The newly selected position indicator light will continue to flash.
3. If the transfer case will not shift, a message
will appear on the cluster stating the 4WD
shift has canceled.
NOTE:
Before retrying a selection, make certain that all
the necessary requirements for selecting a new
transfer case position have been met. To retry
the selection, push the current position, wait
five seconds, and retry selection.
The “SVC 4WD Warning Light” monitors the
electronic shift four-wheel drive system. If this
light remains on after engine start up or
illuminates during driving, it means that the
four-wheel drive system is not functioning
properly and that service is required. NOTE:
Do not attempt to make a shift while only the
front or rear wheels are spinning. This could
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 High 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!
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 or death.

21_DT_OM_EN_USC_t.book Page 162

STARTING AND OPERATING165
NOTE:
Do not attempt to make a shift while only the
front or rear wheels are spinning. This could
cause damage to driveline components.
When operating your vehicle in 4WD Low, the
engine speed is approximately three times that
of the 2WD, 4WD Auto or 4WD High 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.
Shifting Procedure
If any of the requirements to select a new
transfer case position have not been met,
then the transfer case will not shift. The posi -
tion indicator light for the previous position
will remain on and the newly selected posi -
tion indicator light will continue to flash until
all the requirements for the selected position
have been met.
If all the requirements to select a new
transfer case position have been met, then
the current position indicator light will turn off
and the selected position indicator light will
flash until the transfer case completes the
shift. When the shift is complete, the position
indicator light for the selected position will
stop flashing and remain on.
ACTIVE-LEVEL FOUR CORNER AIR
SUSPENSION SYSTEM — IF EQUIPPED
DESCRIPTION
The air suspension system provides full time
load leveling capability along with the benefit of
being able to adjust vehicle height by using the
toggle switch.
Air Suspension Switch

Normal Ride Height (NRH)
– This is the stan-
dard position of the suspension and is meant
for normal driving.

Off-Road 1 (OR1) (Raises the vehicle
approximately 1 inch (26 mm)) – This posi-
tion should be the primary position for all
off-road driving until Off-Road 2 (OR2) is
needed. A smoother and more comfortable
ride will result. To enter OR1, push the

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 or death.
1 — Off-Road 2 Indicator (Customer Selectable)
2 — Off-Road 1 Indicator (Customer Selectable)
3 — Normal Ride Height Indicator (Customer Se -
lectable)
4 — Aero Mode Indicator (Customer Selectable)
5 — Entry/Exit Mode Indicator (Customer Select -
able)
4

21_DT_OM_EN_USC_t.book Page 165

214STARTING AND OPERATING
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 Gross
Axle Weight Rating (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 insure that the Gross
Vehicle Weight Rating (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 axle.
Weighing the vehicle may show that the Gross
Axle Weight Rating (GAWR) of either the front or
rear axles 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.
COMMON TOWING DEFINITIONS
The following trailer towing related definitions
will assist you in understanding the following
information:
Gross Vehicle Weight Rating (GVWR)
The GVWR is the total allowable weight of your
vehicle. This includes driver, passengers, cargo
and tongue weight. The total load must be
limited so that you do not exceed the GVWR
Ú
page 213.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.

21_DT_OM_EN_USC_t.book Page 214

STARTING AND OPERATING219
TRAILER AND TONGUE WEIGHT

Weight Distribution

Consider the following items when computing
the weight on the rear axle of the vehicle:
The tongue weight of the trailer.
The weight of any other type of cargo or
equipment put in or on your vehicle.
The weight of the driver and all passengers.
NOTE:
Remember that everything put into or on the
trailer adds to the load on your vehicle. Also,
additional factory-installed options or
dealer-installed options must be considered as
part of the total load on your vehicle. Refer to
the “Tire And Loading Information” placard for the maximum combined weight of occupants
and cargo for your vehicle.
TRAILER REVERSE STEERING CONTROL
Trailer Reverse Steering Control (TRSC) is a
feature that will allow the driver to back up a
trailer using a knob located on the center stack.
The feature works by the user first hooking up a
trailer and then performing the calibration
maneuvers.
Calibration:
First bring the vehicle and trailer to a complete
stop in a large open area, place the vehicle in
PARK and push the TRSC button located above
the knob in the center stack.
To calibrate a trailer, the driver must drive
forward 100 ft (30 m). Then perform a 90
degree turn and return to a straight position for
65 ft (20 m). Perform another 90 degree turn,
followed by another 65 ft (20 m) straight drive. Upon completion this the feature will be
available to activate.
NOTE:
The 90 degree turns could be in either the left
or right direction.

Trailer Reverse Steering Control Calibration

CAUTION!
Always observe the position of the trailer and
surroundings using the camera and mirrors to
avoid damage to the truck or trailer.
1 — Straight 100 ft (30 m)
2 — Intersection turn with radius 50-65 ft
(15-20 m) in either direction
3 — Straight 50 ft (15 m)
4 — Intersection turn with radius 50-65 ft
(15-20 m) in either direction
5 — Straight 50 ft (15 m)
6 — Straight 65 ft (20 m), making sure to align ve -
hicle/trailer to path center line
7 — Feature is active, turn knob left or right to
back the trailer up
4

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