2020 Ram 2500 fuel cap

SERVICING AND MAINTENANCE411
(Continued)
(Continued)
exhaust system inspected each time the vehicle
is raised for lubrication or oil change. Replace
as required.
Under normal operating conditions, the cata-
lytic converter will not require maintenance.
However, it is important to keep the engine
properly tuned to ensure proper catalyst opera-
tion and prevent possible catalyst damage.
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 transmis
-
sion 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
WARNING!

Exhaust gases can injure or kill. They contain
carbon monoxide (CO), which is colorless
and odorless. Breathing it can make you
unconscious and can eventually poison you.
To avoid breathing CO, refer to “Safety Tips”
in “Safety” for further information.

A hot exhaust system can start a fire if you
park over materials that can burn. Such
materials might be grass or leaves coming
into contact with your exhaust system. Do
not park or operate your vehicle in areas
where your exhaust system can contact
anything that can burn.
CAUTION!
The catalytic converter requires the use of
unleaded fuel only. Leaded gasoline will
destroy the effectiveness of the catalyst as
an emissions control device and may seri-
ously reduce engine performance and
cause serious damage to the engine.
Damage to the catalytic converter can
result if your vehicle is not kept in proper
operating condition. In the event of engine
malfunction, particularly involving engine
misfire or other apparent loss of perfor -
mance, have your vehicle serviced
promptly. Continued operation of your
vehicle with a severe malfunction could
cause the converter to overheat, resulting
in possible damage to the converter and
vehicle.
CAUTION! (Continued)
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.

7

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SERVICING AND MAINTENANCE415
(Continued)
Keep the front of the radiator clean. If your
vehicle is equipped with air conditioning,
keep the front of the condenser clean.
Do not change the thermostat for Summer or
Winter operation. If replacement is ever
necessary, install ONLY the correct type ther -
mostat. Other designs may result in unsatis -
factory engine coolant (antifreeze)
performance, poor gas mileage, and
increased emissions.
Charge Air Cooler — Inter-Cooler
The charge air cooler is positioned below the
radiator and the air conditioner condenser. Air
enters the engine through the air cleaner and
passes through the turbocharger, where it is
pressurized. This pressurized air rapidly
reaches high temperature. The air is then
directed through a hose to the charge air cooler
and through another hose to the intake mani -
fold of the engine. The air entering the engine
has been cooled by about 50° to 100°F (10° to
38°C). This cooling process enables more effi -
cient burning of fuel resulting in fewer emis -
sions.
To guarantee optimum performance of the
system, keep the surfaces of the charge air
cooler, condenser and radiator clean and free of debris. Periodically check the hoses leading
to and from the charge air cooler for cracks or
loose clamps resulting in loss of pressure and
reduced engine performance.
Brake System
In order to ensure brake system performance,
all brake system components should be
inspected periodically. Refer to the “Mainte
-
nance Plan” in this section for the proper main -
tenance intervals.
Fluid Level Check — Brake Master Cylinder
The fluid level of the master cylinder should be
checked when performing under the hood
service or immediately if the brake system
warning lamp indicates system failure. If necessary, add fluid to bring level within the
designated marks on the side of the reservoir of
the brake master cylinder. Be sure to clean the
top of the master cylinder area before removing
cap.
With disc brakes the fluid level can be expected
to fall as the brake linings wear. However, an
unexpected drop in fluid level may be caused by
a leak and a system check should be
conducted.
Refer to “Fluids And Lubricants” in “Technical
Specifications” for further information.
WARNING!
Riding the brakes can lead to brake failure
and possibly a collision. Driving with your foot
resting or riding on the brake pedal can result
in abnormally high brake temperatures,
excessive lining wear, and possible brake
damage. You would not have your full braking
capacity in an emergency.WARNING!
Use only manufacturer's recommended
brake fluid. Refer to “Fluids And Lubri
-
cants” in “Technical Specifications” for
further information. Using the wrong type of
brake fluid can severely damage your brake
system and/or impair its performance. The
proper type of brake fluid for your vehicle is
also identified on the original factory
installed hydraulic master cylinder reser -
voir.
7

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428SERVICING AND MAINTENANCE
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).
Tires — General Information
Tire Pressure
Proper tire inflation pressure is essential to the
safe and satisfactory operation of your vehicle.
Four primary areas are affected by improper tire
pressure:
Safety
Fuel Economy
Tread Wear
Ride Comfort and Vehicle Stability Safety
Both underinflation and overinflation affect the
stability of the vehicle and can produce a feeling
of sluggish response or over responsiveness in
the steering.
NOTE:
Unequal tire pressures from side to side may
cause erratic and unpredictable steering
response.
Unequal tire pressure from side to side may
cause the vehicle to drift left or right.
Fuel Economy
Underinflated tires will increase tire rolling
resistance resulting in higher fuel consumption.
Tread Wear
Improper cold tire inflation pressures can cause
abnormal wear patterns and reduced tread life,
resulting in the need for earlier tire replace -
ment.
Ride Comfort And Vehicle Stability
Proper tire inflation contributes to a comfort -
able ride. Overinflation produces a jarring and
uncomfortable ride.
WARNING!
Overloading of your tires is dangerous.
Overloading can cause tire failure, affect vehicle
handling, and increase your stopping distance.
Use tires of the recommended load capacity for
your vehicle. Never overload them.
WARNING!
Improperly inflated tires are dangerous and
can cause collisions.
Underinflation increases tire flexing and
can result in overheating and tire failure.
Overinflation reduces a tire's ability to
cushion shock. Objects on the road and
chuckholes can cause damage that result
in tire failure.
Overinflated or underinflated tires can
affect vehicle handling and can fail
suddenly, resulting in loss of vehicle
control.
Unequal tire pressures can cause steering
problems. You could lose control of your
vehicle.
Unequal tire pressures from one side of the
vehicle to the other can cause the vehicle
to drift to the right or left.
Always drive with each tire inflated to the
recommended cold tire inflation pressure.

20_DJD2_OM_EN_USC_t.book Page 428

TECHNICAL SPECIFICATIONS449
NOTE:
If you accidentally fill the fuel tank with gaso -
line on your diesel vehicle, do not start the
vehicle. If you restart your vehicle you risk
damaging the engine and fuel system. Please
call an authorized dealer for service.
A maximum blend of 5% biodiesel meeting
ASTM specification D-975 may be used with
your Cummins diesel engine. (Chassis Cab
models not configured with B20 capability.)
A maximum blend of 20% biodiesel meeting
ASTM specification D-7467 may be used with
your Cummins diesel engine. (Pickup models
and Chassis Cab models configured with
B20 Capability.)
In addition, commercially available fuel addi -
tives are not necessary for the proper opera -
tion of your Cummins diesel engine.
However, if seasonably adjusted fuel is not
available and you are operating below 20°F
(-6°C), Mopar Premium Diesel Fuel Treat -
ment (or equivalent) may be beneficial to
avoid fuel gelling.
No. 1 Ultra Low Sulfur diesel fuel should only
be used where extended arctic conditions
(0°F or -18°C) exist.
Biodiesel Fuel Requirements
Pickup Models And Chassis Cab Models
Ordered With B20 Option
Your vehicle has been validated and approved
for the use of biodiesel in blends up to 20%
(B20) provided that you comply with the require -
ments outlined below. It is important that you
understand and comply with these require -
ments. Failure to comply with Oil Change
requirements for vehicles operating on
biodiesel blends up to B20 will result in prema -
ture engine wear. Such wear is not covered by
the New Vehicle Limited Warranty.
Biodiesel is a fuel produced from renewable
resources typically derived from animal fat,
rapeseed oil (Rapeseed Methyl Ester (RME)
base), or soybean oil (Soy Methyl Ester (SME or
SOME) base). Biodiesel fuel has inherent limita-
tions which require that you understand and
adhere to the following requirements if you use
blends of biodiesel greater then 5% but not
greater than 20% (B6-B20). There are no
unique restrictions for the use of B5. Use of
blends greater than 20% is not approved. Use of
blends greater than 20% can result in engine
damage. Such damage is not covered by the
New Vehicle Limited Warranty.
Fuel Quality — Must Comply With ASTM
Standards
The quality of biodiesel fuel may vary widely.
Only fuel produced by a BQ9000 supplier to the
following specifications may be blended to
meet biodiesel blend (B6–B20) fuel meeting
ASTM specification D-7467:
Pretrodiesel fuel meeting ASTM specification
D-975 and biodiesel fuel (B100) meeting
ASTM specification D-6751.
Fuel Oxidation Stability — Must Use Fuel
Within Six Months Of Manufacture
Biodiesel fuel has poor oxidation stability which
can result in long term storage problems. Fuel
produced to approved ASTM standards, if
stored properly, provides for protection against
fuel oxidation for up to six months.
Fuel Water Separation — Must Use Mopar/
Cummins Approved Fuel Filter Elements
You must use Mopar/Cummins approved fuel
filter elements in both your engine mounted
filter and frame mounted filter.
Biodiesel fuel has a natural affinity to water and
water accelerates microbial growth. Your
Mopar/Cummins filtration system is designed
to provide adequate fuel water separation capa-
bilities.
8

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450TECHNICAL SPECIFICATIONS
Bio-Diesel Fuel Properties — Low Ambient
Temperatures
Biodiesel fuel may gel or solidify at low ambient
temperatures, which may pose problems for
both storage and operation. Precautions can be
necessary at low ambient temperatures, such
as storing the fuel in a heated building or a
heated storage tank, or using cold temperature
additives.
Fuel In Oil Dilution — Must Adhere To
Required Oil Change Interval
Fuel dilution of lubricating oil has been
observed with the use of biodiesel fuel. Fuel in
oil must not exceed 5%. To ensure this limit is
met your oil change interval must be main -
tained to the following schedule:
Ram PickUp 2500/3500 Only — 15,000 Miles*
(*unless otherwise notified with a oil service
message)
CAUTION!
Under no circumstances should oil change
intervals exceed 15,000 miles (24 000 km)
pickup or 12,500 miles (20 000 km)
chassis cab if operation occurs with greater
than 5% biodiesel blends. Oil change inter -
vals should not exceed 6 months in either
case. Failure to comply with these Oil
Change requirements for vehicles operating
on biodiesel blends up to B20 may result in
premature engine wear. Such wear is not
covered by the New Vehicle Limited
Warranty.
B20 Biodiesel capable: The engine may
suffer severe damage if operated with
concentrations of Biodiesel higher than
20%.

20_DJD2_OM_EN_USC_t.book Page 450

TECHNICAL SPECIFICATIONS451
FLUID CAPACITIES — GAS ENGINE
FLUID CAPACITIES — DIESEL ENGINE
USMetric
Fuel (Approximate)
2500/3500 Shortbed Models 31 Gallons117 Liters
2500/3500 Longbed Models 32 Gallons121 Liters
2500/3500 Crew Cab Longbed Models — If Equipped 50 Gallons189 Liters
Engine Oil With Filter
6.4L Engine (We recommend you use SAE 0W-40 engine oil meeting the requirements of
FCA Material Standard MS-12633 for use in all operating temperatures.) 7 Quarts
6.6 Liters
Cooling System
6.4L Engine – (We recommend you use Mopar® Antifreeze/Coolant 10 Year/
150,000 Mile Formula that meets the requirements of FCA Material Standard
MS.90032.) 16.6 Quarts
15.7 Liters
USMetric
Fuel (Approximate)
2500/3500 Standard Cab Longbed Models 28 Gallons106 Liters
2500/3500 Crew/Mega Cab Shortbed Models 31 Gallons117 Liters
2500/3500 Crew Cab Longbed Models 32 Gallons121 Liters
2500/3500 Crew Cab Longbed Models — If Equipped 50 Gallons189 Liters
8

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456TECHNICAL SPECIFICATIONS
Fuel Selection Use good quality diesel fuel from a reputable supplier in your vehicle.
Federal law requires that you must fuel this vehicle with Ultra Low Sulfur
Highway Diesel fuel (15 ppm Sulfur maximum) and prohibits the use of
Low Sulfur Highway Diesel fuel (500 ppm Sulfur maximum) to avoid
damage to the emissions control system.
For most year-round service, No. 2 diesel fuel meeting ASTM
specification D-975 Grade S15 will provide good performance.
If climatized or diesel Number 1 ULSD fuel is not available, and you are
operating below (20°F/-6°C), in sustained arctic conditions, Mopar
Premium Diesel Fuel Treatment (or equivalent) is recommended to avoid
gelling.
This vehicle is fully compatible with biodiesel blends up to 5% biodiesel
meeting ASTM specification D-975.
Pickup models, and Chassis Cab
models configured with optional B20 capability, are additionally
compatible with 20% biodiesel meeting ASTM specification D-7467.
Diesel Exhaust Fluid Mopar Diesel Exhaust Fluid (API Certified) (DEF) or equivalent that has
been API Certified to the ISO 22241 standard. Use of fluids not API
Certified to ISO 22241 may result in system damage. You can receive
assistance in locating DEF in the United States by calling 866-RAM-INFO
(866-726-4636). In Canada call 1–800–465–2001 (English) or
1–800–387–9983 (French).
Component
Fluid, Lubricant, or Genuine Part

20_DJD2_OM_EN_USC_t.book Page 456

540
INDEX
A
Adaptive Cruise Control (ACC) (Cruise
Control)
.......................................................... 275
Adding Engine Coolant (Antifreeze)............... 413
Adding Fuel.......................................... 312, 313
Additives, Fuel............................................... 446AdjustDown
........................................................... 34
Forward....................................................... 34
Rearward..................................................... 34
Up................................................................ 34
Adjustable Pedals............................................ 43
Air BagAir Bag Operation
...................................... 184
Air Bag Warning Light................................ 181Enhanced Accident Response......... 189, 371
Event Data Recorder (EDR)....................... 371
If Deployment Occurs................................ 188Knee Impact Bolsters................................ 184
Maintaining Your Air Bag System.............. 189
Maintenance............................................. 189Redundant Air Bag Warning Light.............182
Transporting Pets...................................... 208
Air Bag Light............................... 130, 181, 209
Air Cleaner, Engine (Engine Air Cleaner
Filter)
................................................... 398, 419
Air Conditioner Maintenance........................ 400
Air Conditioner Refrigerant........................... 400
Air Conditioner System................................. 400
Air Conditioning......................................... 57, 68
Air Conditioning Filter..............................70, 401
Air Conditioning System................................... 68Air Conditioning, Operating Tips....................... 69
Air Filter........................................................ 398
Air PressureTires
......................................................... 429
AlarmPanic
........................................................... 15
Security Alarm....................................25, 131
Alterations/ModificationsVehicle
......................................................... 12Android Auto................................................. 533
Antifreeze (Engine Coolant)................. 412, 451
Capacites................................................. 451Disposal................................................... 414
Anti-Lock Brake System (ABS)...................... 144
Anti-Lock Warning Light................................ 136Apple CarPlay................................................ 533
Assist, Hill Start............................................. 151
Audio Systems (Radio).................................. 458
Auto Down Power Windows............................. 71
Automatic Door Locks...................................... 31
Automatic Headlights.......................................51
Automatic Tailgate Release.............................75
Automatic Temperature Control (ATC)..............68
Automatic Transmission....................... 233, 418
Adding Fluid.............................................. 418
Fluid And Filter Change............................. 418Fluid Change............................................. 418
Fluid Level Check............................. 416, 417
Fluid Type...............................416, 454, 457
Shifting..................................................... 237
Special Additives...................................... 416
Automatic Transmission Limp Home Mode... 236
AUX Camera......................................... 304, 311
Auxiliary Driving Systems.............................. 153
Axle Fluid.....................................418, 454, 457Axle Lubrication............................................ 418
B
Back-Up
......................................................... 302
Back-Up Camera........................................... 302
Bar, Stabilizer/Sway System......................... 253Battery................................................. 132, 395
Blanket..................................................... 223
Charging System Light.............................. 132Keyless Key Fob Replacement....................15
Battery Saver Feature......................................53

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