towing Ram 3500 Chassis Cab 2020 Workshop Manual

SERVICING AND MAINTENANCE363
NOTE:
Intentional tampering with emissions control
systems can result in civil penalties being
assessed against you.
In unusual situations involving grossly malfunc -
tioning engine operation, a scorching odor may
suggest severe and abnormal catalyst over -
heating. If this occurs, stop the vehicle, turn off
the engine and allow it to cool. Service,
including a tune-up to manufacturer's specifica-
tions, should be obtained immediately.
To minimize the possibility of catalytic converter
damage:
Do not interrupt the ignition when the trans -
mission is in gear and the vehicle is in
motion.
Do not try to start the vehicle by pushing or
towing the vehicle.
Do not idle the engine with any ignition
components disconnected or removed, such
as when diagnostic testing, or for prolonged
periods during very rough idle or malfunc -
tioning operating conditions.
Cooling System Engine Coolant Checks
Check the engine coolant (antifreeze) protec-
tion every 12 months (before the onset of
freezing weather, where applicable). If the
engine coolant (antifreeze) is dirty or rusty in
appearance, the system should be drained,
flushed and refilled with fresh coolant. Check
the front of the A/C condenser (if equipped) or
radiator for any accumulation of bugs, leaves,
etc. If dirty, clean by gently spraying water from
a garden hose vertically down the face of the A/
C condenser (if equipped) or the back of the
radiator core.
Check the engine cooling system hoses for
brittle rubber, cracking, tears, cuts and tight-
ness of the connection at the coolant recovery
bottle and radiator. Inspect the entire system
for leaks.
DO NOT REMOVE THE COOLANT PRESSURE CAP
WHEN THE COOLING SYSTEM IS HOT. WARNING!
You or others can be badly burned by hot
engine coolant (antifreeze) or steam from
your radiator. If you see or hear steam
coming from under the hood, do not open
the hood until the radiator has had time to
cool. Never open a cooling system pressure
cap when the radiator or coolant bottle is
hot.
Keep hands, tools, clothing, and jewelry
away from the radiator cooling fan when
the hood is raised. The fan starts automati -
cally and may start at any time, whether the
engine is running or not.
When working near the radiator cooling fan,
disconnect the fan motor lead or turn the
ignition to the OFF mode. The fan is
temperature controlled and can start at any
time the ignition is in the ON mode.7

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380SERVICING AND MAINTENANCE
For further information on GAWRs, vehicle
loading, and trailer towing, refer to “Vehicle
Loading” in the “Starting And Operating”
section of this manual.
To determine the maximum loading conditions
of your vehicle, locate the statement “The
combined weight of occupants and cargo
should never exceed XXX kg or XXX lbs” on the
Tire and Loading Information placard. The
combined weight of occupants, cargo/luggage
and trailer tongue weight (if applicable) should
never exceed the weight referenced here.
Steps For Determining Correct Load
Limit—
(1) Locate the statement “The combined
weight of occupants and cargo should
never exceed XXX kg or XXX lbs.” on your
vehicle's placard.
(2) Determine the combined weight of
the driver and passengers that will be
riding in your vehicle.
(3) Subtract the combined weight of the
driver and passengers from XXX kg or
XXX lbs. (4) The resulting figure equals the avail
-
able amount of cargo and luggage load
capacity. For example, if “XXX” amount
equals 1400 lbs. and there will be five
150 lb passengers in your vehicle, the
amount of available cargo and luggage
load capacity is 650 lbs. (1400-750
(5x150) = 650 lbs.)
(5) Determine the combined weight of
luggage and cargo being loaded on the
vehicle. That weight may not safely
exceed the available cargo and luggage
load capacity calculated in Step 4.
(6) If your vehicle will be towing a trailer,
load from your trailer will be transferred
to your vehicle. Consult this manual to
determine how this reduces the avail -
able cargo and luggage load capacity of
your vehicle.
Metric Example For Load Limit
For example, if “XXX” amount equals 635 kg
and there will be five 68 kg passengers in your
vehicle, the amount of available cargo and
luggage load capacity is 295 kg (635-340
(5x68) = 295 kg) as shown in step 4.
NOTE:
If your vehicle will be towing a trailer, load
from your trailer will be transferred to your
vehicle. The following table shows examples
on how to calculate total load, cargo/
luggage, and towing capacities of your
vehicle with varying seating configurations
and number and size of occupants. This table
is for illustration purposes only and may not
be accurate for the seating and load carry
capacity of your vehicle.
For the following example, the combined
weight of occupants and cargo should never
exceed 865 lbs (392 kg).

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SERVICING AND MAINTENANCE387
Snow Tires
Some areas of the country require the use of
snow tires during the Winter. Snow tires can be
identified by a “mountain/snowflake” symbol
on the tire sidewall.
If you need snow tires, select tires
equivalent in size and type to the orig -
inal equipment tires. Use snow tires
only in sets of four; failure to do so
may adversely affect the safety and handling of
your vehicle.
Snow tires generally have lower speed ratings
than what was originally equipped with your
vehicle and should not be operated at
sustained speeds over 75 mph (120 km/h). For
speeds above 75 mph (120 km/h) refer to orig -
inal equipment or an authorized tire dealer for
recommended safe operating speeds, loading
and cold tire inflation pressures.
While studded tires improve performance on
ice, skid and traction capability on wet or dry
surfaces may be poorer than that of
non-studded tires. Some states prohibit
studded tires; therefore, local laws should be
checked before using these tire types.
Spare Tires — If Equipped
Refer to the “Towing Requirements - Tires” in
“Starting And Operating” for restrictions when
towing with a spare tire designated for tempo -
rary emergency use.
Spare Tire Matching Original Equipped Tire
And Wheel — If Equipped
Your vehicle may be equipped with a spare tire
and wheel equivalent in look and function to the
original equipment tire and wheel found on the
front or rear axle of your vehicle. This spare tire
may be used in the tire rotation for your vehicle.
If your vehicle has this option, refer to an autho -
rized tire dealer for the recommended tire rota -
tion pattern.
Compact Spare Tire — If Equipped
The compact spare is for temporary emergency
use only. You can identify if your vehicle is
equipped with a compact spare by looking at
the spare tire description on the Tire and
Loading Information Placard located on the
driver’s side door opening or on the sidewall of
the tire. Compact spare tire descriptions begin
with the letter “T” or “S” preceding the size
designation. Example: T145/80D18 103M.
T, S = Temporary Spare Tire
Since this tire has limited tread life, the original
equipment tire should be repaired (or replaced)
and reinstalled on your vehicle at the first
opportunity.
Do not install a wheel cover or attempt to mount
a conventional tire on the compact spare wheel,
since the wheel is designed specifically for the
compact spare tire. Do not install more than
one compact spare tire and wheel on the
vehicle at any given time.CAUTION!
Because of the reduced ground clearance, do
not take your vehicle through an automatic
car wash with a compact or limited use
temporary spare installed. Damage to the
vehicle may result.
7

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MULTIMEDIA425
Engine Off Options
After pressing the Engine Off Options button on the touchscreen, the following settings will be available:
Suspension — If Equipped
After pressing the Suspension button on the touchscreen, the following settings will be available:
Setting Name Selectable Options
Easy Exit Seats — If EquippedOnOff
Headlight Off Delay 0 sec30 sec
60 sec 90 sec
Engine Off Power Delay 0 sec45 sec
5 min 10 min
Auto Entry/Exit — If Equipped OnOff
Setting Name Selectable Options
Display Suspension MessagesAllWarning Only
Tire Jack Mode OnOff
NOTE:
When this feature is selected, the air suspension system is disabled to prevent auto leveling of the suspension, while the vehicle is on a jack changing
a tire. Transport Mode OnOff
NOTE:
When the “Transport Mode” feature is selected, the air suspension system is disabled to assist with flat bed towing.
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442MULTIMEDIA
Air Suspension — If Equipped
After pressing the Suspension button on the touchscreen, the following settings will be available:
Setting Name Selectable Options
Display Suspension MessagesAllWarnings Only
Tire Jack Mode On Off
NOTE:
When the “Tire Jack Mode” feature is selected, the air suspension system is disabled to assist with changing a spare tire. Transport Mode On Off
NOTE:
When the “Transport Mode” feature is selected, the air suspension system lowers and then disables to assist with flat bed towing. Wheel Alignment Mode On Off
NOTE:
Before performing a wheel alignment, the “Wheel Alignment Mode” must be enabled. Refer to an authorized dealer for further information.

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MULTIMEDIA461
Trailer
After pressing the Trailer button on the touchscreen, the following settings will be available:
Once selecting the specific trailer, the following
programmable options become available:Transport Mode
On Off
NOTE:
When the “Transport Mode” feature is selected, the air suspension system lowers and then disables to assist with flat bed towing. Wheel Alignment Mode On Off
NOTE:
Before performing a wheel alignment, the “Wheel Alignment Mode” must be enabled. Refer to an authorized dealer for further information.
Setting Name Selectable Options
Setting NameSelectable Options
TrailerTrailer 1 Trailer 2Trailer 3Trailer 4
Setting Name Selectable Options
Use This TrailerOn Off
Braking Light ElectricLight Electric
Over Hydraulic Heavy Electric
Heavy Electric
Over Hydraulic
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506
Dipsticks Power Steering
..................................229Disabled Vehicle Towing..........................326DisposalAntifreeze (Engine Coolant)...................365Do Not Disturb......................................496Door Ajar.............................................111Door Ajar Light......................................111Door LocksAutomatic...........................................29Doors....................................................25Draining Fuel/Water Separator Filter..........354Driver’s Seat Back Tilt...............................30DrivingThrough Flowing, Rising, Or Shallow Standing Water
..........................................292Dual Rear Wheels.................. 317, 391, 398
E
Electric Brake Control System...................121Anti-Lock Brake System.......................120Electronic Roll Mitigation..............124, 127Electrical Power Outlets.............................78Electronic Range Select (ERS)........... 211, 217Electronic Stability Control (ESC)...............124Electronic Throttle Control Warning Light.....110Electronically Shifted Transfer Case...219, 222Emergency Braking................................204Emergency, In Case OfFreeing Vehicle When Stuck..................324
Hazard Warning Flasher...................... 294Jacking............................................ 314Jump Starting................................... 319Emission Control System Maintenance....... 119Engine........................................ 343, 344Air Cleaner....................................... 349Block Heater..................................... 190Break-In Recommendations................. 202Compartment.................................... 344Compartment Identification.................. 343Coolant (Antifreeze).................... 407, 410Exhaust Gas Caution.................. 180, 401Fails To Start.................................... 186Flooded, Starting............................... 186Fuel Requirements............................. 399Identifcation..................................... 344Idling.............................................. 197Jump Starting................................... 319Oil.................................. 347, 407, 410Oil Filler Cap............................. 343, 348Oil Filter........................................... 349Oil Reset............................................ 93Oil Selection..................................... 347Oil Synthetic..................................... 349Overheating...................................... 321Runaway.......................................... 267Starting........................................... 184Engine Oil Viscosity................................ 348Enhanced Accident Response
Feature....................................... 158, 328
Entry System, Illuminated.......................... 49Ethanol............................................... 400Exhaust Brake...................................... 203Exhaust Gas Cautions.................... 180, 401Exhaust System.................... 180, 362, 371Exterior Lighting...................................... 44Exterior Lights................................ 44, 182
F
FiltersAir Cleaner
....................................... 349Air Conditioning........................... 64, 352Engine Fuel.............................. 354, 407Engine Oil........................ 349, 407, 410Engine Oil Disposal............................ 349FlashersTurn Signals....................... 47, 117, 182Flash-To-Pass......................................... 46Flat Tire Stowage.................................. 318Fluid Capacities.................................... 405Fluid Leaks.......................................... 182Fluid Level ChecksBrake............................................. 367Power Steering.................................. 229Fluids And Lubricants..................... 407, 410Fog Lights..................................... 47, 303Fold Flat Load Floor................................. 76Fold-Flat Seats....................................... 30Forward Collision Warning....................... 129Four Wheel Drive.................................. 218

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507
Four-Way Hazard Flasher
.........................294Freeing A Stuck Vehicle...........................324Front Axle (Differential)...........................370Fuel.................................... 269, 399, 402Adding.............................................268Additives..........................................400Capacity...........................................405Clean Air..........................................399Diesel.............................. 269, 402, 410Ethanol............................................400Filler Cap (Gas Cap)............................268Filter....................................... 354, 407Gasoline..........................................399Light...............................................113Materials Added.................................400Methanol.........................................400Octane Rating...................................399Requirements........................... 399, 402Specifications....................................402Tank Capacity....................................405Fuses..................................................305
G
Garage Door Opener (HomeLink).................67Gas Cap (Fuel Filler Cap).........................268Gasoline, Clean Air.................................399Gasoline, Reformulated...........................399Gauges Voltage............................................194Gear Ranges.........................................207
Gear Selector Override............................ 322General Information....................... 132, 140Glass Cleaning...................................... 396Gross Axle Weight Rating......................... 274Gross Vehicle Weight Rating.................... 274GuideBody Builders...................................... 11GVWR................................................. 273
H
HazardDriving Through Flowing, Rising, Or Shallow Standing Water
.............................. 292Hazard Warning Flashers........................ 294Head Restraints...................................... 36Head Rests............................................ 36Headlights........................................... 301Automatic High Beam........................... 45Cleaning.......................................... 394High Beam......................................... 45Lights On Reminder.............................. 47Passing............................................. 46Switch............................................... 44Heated Mirrors....................................... 43Hill Descent Control............................... 128Hill Descent Control Indicator................... 128Hill Start Assist..................................... 122HitchesTrailer Towing................................... 278Hoisting.............................................. 374
HomeLink (Garage Door Opener)................ 67Hood Prop............................................. 66Hood Release......................................... 66Hub Caps............................................ 318
I
Idle-Up Feature..................................... 198Ignition................................................. 17Switch............................................... 17Illuminated Entry..................................... 49In Vehicle HelpVehicle User Guide............................... 12Inside Rearview Mirror...................... 40, 294Instrument Cluster.................87, 88, 90, 91Descriptions..................................... 117Display.............................................. 92Engine Oil Reset.................................. 93Instrument Panel Lens Cleaning............... 396Integrated Trailer Brake Control................ 281Interior Appearance Care........................ 395Interior Lights......................................... 48Intermittent Wipers (Delay Wipers).............. 50Intervention Regeneration Strategy... 103, 359Inverter Outlet (115V).............................. 80iPod/USB/MP3 Control........................... 481
J
Jack Location....................................... 314Jack Operation..................................... 314Jacking And Tire Changing....................... 314
11

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509
Methanol
.............................................400Mirrors..................................................40Electric Powered..................................41Heated..............................................43Memory.............................................32Outside..............................................41Rearview.................................... 40, 294Trailer Towing......................................42Modifications/Alterations Vehicle..............................................11Monitor, Tire Pressure System..................132Mopar Accessories.................................413Mopar Parts.........................................502MP3 Control.........................................481Multi-Function Control Lever.......................44
N
Navigation System (Uconnect GPS)............258New Vehicle Break-In Period.....................202Noise ControlMaintenance.....................................371Tampering Prohibited..........................372Noise Emission Warranty.................371, 372
O
Occupant Restraints...............................141Octane Rating, Gasoline (Fuel)..................399Oil Change Indicator...............................335Oil Filter, Change...................................349Oil Filter, Selection.................................349
Oil Pressure Light.................................. 110Oil Reset............................................... 93Oil, Engine........................... 347, 407, 410Capacity.......................................... 405Change Interval................................. 347Dipstick........................................... 345Disposal.......................................... 349Filter............................... 349, 407, 410Filter Disposal................................... 349Identification Logo..................... 347, 348Materials Added To............................ 349Pressure Warning Light....................... 110Recommendation.............................. 347Synthetic......................................... 349Viscosity.......................................... 348Onboard Diagnostic System..................... 118Operating Precautions............................ 118Operator ManualOwner's Manual........................... 11, 503Outside Rearview Mirrors.......................... 41Overdrive............................................. 212Overdrive OFF Switch............................. 212Overheating, Engine............................... 321
P
Paint Care........................................... 393Panic Alarm............................................ 14Parking Brake....................................... 204ParkSense System, Rear................. 246, 250Passive Entry.......................................... 26
Pedals, Adjustable................................... 39Pets................................................... 179Placard, Tire And Loading Information........ 379PowerDistribution Center (Fuses).................. 306Door Locks......................................... 26Mirrors.............................................. 41Outlet (Auxiliary Electrical Outlet)....... 78, 80Seats................................................ 31Sliding Rear Window............................. 66Steering.................................... 41, 229Take-Off Adapter............................... 228Take-Off Operation............................. 228Windows........................................... 64Power SeatsDown................................................ 31Forward............................................. 31Rearward........................................... 31Recline.............................................. 31Tilt................................................... 31Up.................................................... 31Power Steering Fluid.............................. 409Pregnant Women And Seat Belts.............. 149Preparation For Jacking.......................... 314PTO (Power Take-Off)............................. 228
R
Radial Ply Tires..................................... 384Radiator Cap (Coolant Pressure Cap). 363, 365Radio Operation.................................... 483
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510
Rain Sensitive Wiper System
......................51Rear Axle (Differential).................... 370, 371Rear Camera........................................261Rear ParkSense System.................. 246, 250Rear Window, Sliding................................66Recreational Towing...............................288Shifting Into Transfer Case Neutral (N)....290Shifting Out Of Transfer Case Neutral (N)....................................291Reformulated Gasoline...........................399Refrigerant...................................351, 352Release, Hood........................................66Reminder, Seat Belt...............................142Remote Keyless Entry...............................13Panic Alarm........................................14Programming Additional Key Fobs...... 16, 23Remote Start (Diesel)...............................20Remote Start (Gasoline)............................18Remote StartingExit Remote Start Mode.........................19Uconnect Customer ProgrammableFeatures....................... 424, 440, 459Uconnect Settings.............. 424, 440, 459Replacement Bulbs................................300Replacement Keys...................................23Replacement Tires.................................385Reporting Safety Defects.........................502Resetting Perform Service Indicator...........335Restraints, Child....................................160Restraints, Head......................................36
Rotation, Tires...................................... 391
S
Safety Checks Inside Vehicle.................... 180Safety Checks Outside Vehicle.................. 182Safety Defects, Reporting........................ 502Safety Information, Tire........................... 374Safety Tips........................................... 180Safety, Exhaust Gas............................... 180Schedule, Maintenance.......................... 329Seat BeltAutomatic Locking Retractor (ALR)......... 149Seat Belt Reminder................................ 108Seat Belts.................................... 142, 180Adjustable Shoulder Belt..................... 146Adjustable Upper Shoulder Anchorage.... 146Adjustable Upper Shoulder BeltAnchorage.................................... 146Child Restraints................................. 160Extender.......................................... 148Front Seat................................ 142, 145Inspection........................................ 180Lap/Shoulder Belt Operation................ 145Lap/Shoulder Belt Untwisting............... 146Operating Instructions......................... 145Pregnant Women............................... 149Reminder......................................... 142Seat Belt Extender............................. 148Seat Belt Reminder............................ 142Untwisting Procedure.......................... 146
Seat Belts Maintenance.......................... 395Seats............................................. 30, 31Adjustment.................................. 30, 31Easy Entry.......................................... 33Folding Floor...................................... 76Head Restraints.................................. 36Memory............................................. 32Power............................................... 31Rear Folding....................................... 30Tilting............................................... 30Security Alarm................................ 24, 110Selection Of Coolant (Antifreeze)....... 407, 410Sentry KeyKey Programming................................ 23Sentry Key (Immobilizer)........................... 22Sentry Key Replacement........................... 23Service Assistance................................ 500Service Contract................................... 501Service Manuals................................... 503Shift Lever Override............................... 322Shifting............................................... 205Automatic Transmission.............. 207, 213Transfer Case................................... 227Transfer Case, Shifting Into Transfer Case Neutral (N)................. 290Transfer Case, Shifting Out Of Transfer Case Neutral (N)............................ 291Signals, Turn.......................... 47, 117, 182Siri..................................................... 495Sliding Rear Window, Power....................... 66

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