2021 Ram Heavy Duty Available Performance Features

Clean, efficient, dependable and durable, the proven 6.7L Cummins Turbo Diesel engine:

• Produces 370 hp and 850 lb-ft of torque and is mated with the 68RFE 6-speed automatic transmission (available on 2500/3500)
• Cummins 6.7L High-Output Turbo Diesel version produces 420 hp and best-in-class¹ 1,075 lb-ft of torque and is mated with the AISIN 6-speed heavy-duty automatic transmission (available on 3500 only)

Supports impressive capabilities:

• Maximum Gross Combined Weight Rating (3500) = 45,000 lb²
• Maximum Gross Vehicle Weight Rating (3500) = 14,000 lb²
• Best-in-class¹ Maximum Diesel Towing Rating (3500) = 37,100 lb²
• Maximum Payload Rating (3500) = 6,840 lb²

The Ram Brand applies SAE J2807 testing criteria to its entire pickup truck line and towing claims

Features:

• The compacted graphite iron block helps provide reduced weight and minimized noise/vibration/harshness (NVH)
• The cooling system achieves heat reduction via a “low-slung” positioned charge air cooler, faster-sequenced water pumps, an efficient 11-blade radiator fan and a dual radiator system
• The “smart” exhaust brake is an enhanced design for smoother, less aggressive exhaust braking characteristics, contributing to improved driver control, reduced brake fade and longer brake life
• To reduce operating costs, diesel oil change intervals are as high as a best-in-class¹ 15,000 miles
• 5-year/100,000-Mile Diesel Powertrain Limited Warranty³ protects your investment and promotes on-the-job confidence by covering the cost of parts and labor

Power, efficiency and confidence with the legendary Cummins diesel!

HOW IT WORKS

Your diesel engine will sound, feel, drive and operate differently from a gasoline-powered engine

The Cummins diesel engine in your new vehicle provides good operating efficiency rugged durability and high torque for pulling heavy loads:

• Meets all EPA heavy-duty diesel engine emission standards
• Equipped with a state-of-the-art engine and exhaust system
• These systems are seamlessly integrated into your vehicle and managed by the Cummins Powertrain Control Module (PCM)
• The PCM manages engine combustion to allow the exhaust system’s catalyst to trap and burn particulate matter (PM) pollutants (see your owner’s information for details)
• Ability to alert you to important messages that will be displayed in your instrument cluster display

DIESEL EXHAUST FLUID (DEF)

The diesel engine uses a Diesel Exhaust Fluid (DEF) system to help produce cleaner emissions:

• A gauge displays the Diesel Exhaust Fluid level and a warning light will activate any time the level gets too low
• The DEF fluid cap is located in the fuel filler door

To add DEF fluid to your vehicle:

• Remove the cap from the DEF tank
• Insert the DEF fill nozzle into the DEF tank filler neck
• Stop filling the DEF tank immediately if DEF stops flowing from the fill bottle into the DEF tank, DEF splashes out of the filler neck or the DEF pump nozzle automatically shuts off
• Reinstall the cap onto the DEF tank

Be sure to keep diesel fuel and diesel exhaust fluid separate:

• A small amount of DEF in the diesel fuel tank can result in severe damage in the engine, fuel pump and injectors
• If this happens, do not start the engine
• Contact an authorized dealer
• Never let anything other than diesel exhaust fluid into the DEF tank. (This may result in the need to replace the entire DEF system)
• Always use separate containers, funnels and nozzles for fuel and DEF

WATER-IN-FUEL LIGHT

The Water-In-Fuel indicator light will illuminate when there is water detected in the fuel water separator filters:

• If this light remains on, do not start the vehicle before you drain the water from the fuel water separator filters
• If water is detected in the fuel water separator filters while the engine is running, or while the key is in the On/Run position, the indicator light will illuminate and an audible chime will be heard five times
• At this point, you should stop the engine and drain the water from the fuel water separators

There are two fuel filter assemblies

One is located on the driver’s side of the engine:

• The best access to this water drain valve is from under the hood

The second one is on the underbody, located in front of the rear axle above the drive shaft:

• The best access to this water drain valve is from under the vehicle

To drain the fuel water separator filters when the Water-In-Fuel indicator light is on:

• Within 10 minutes of turning the engine off, turn the engine-mounted filter drain valve located on the side of the filter housing, counterclockwise 1/4 turn to drain water that may have accumulated
• Turn the underbody-mounted filter drain valve, located on the bottom of the filter housing, counterclockwise one full turn to drain water that may have accumulated in this filter
• You’ll need to turn the ignition switch to the On/Run position and allow any accumulated water to drain
• Leave the drain valve open until all water and contaminants have been removed
• When clean fuel is visible, close the drain valve by turning it clockwise until you feel resistance
• Then, turn the valve an additional ½ turn to properly compress the seal
• Do not over-compress the seal. Do not use tools.
• Turn the ignition to Off

WAIT TO START

In cold weather (engine temperatures below 66° F, 19° C), the Wait-To-Start light will remain on, indicating the intake manifold heater system is active:

• If this is the case, starting the 6.7L diesel engine is a bit different than usual
• If the Wait-To-Start light is on, pushing the Engine Start button, with the driver’s foot on the brake, will move the ignition from Off or ACC to Run, but the engine will not immediately crank (this is normal)
• The Wait-To-Start light will remain on for a period of time while the manifold heater system preheats the engine
• During this time, the instrument cluster will display a gauge or bar that will indicate the wait-to-start time period until engine start
• When the engine Wait-To-Start light goes off, the engine will automatically crank
• After engine startup, check to see that there is oil pressure