Chevy Duramax® 6.6L Diesel vs. Ram Cummins 6.7L Diesel │Libertyville Chevrolet

What are the differences and similarities between the Chevy Duramax® and Ram Cummins turbo diesel engines? This Chevy Duramax® vs. Ram Cummins breakdown seeks to answer your most pressing queries about these two diesel engine options.

After you’ve finished reading this Duramax® vs. Cummins engine guide, browse Libertyville Chevrolet’s new inventory, then schedule a test drive in Libertyville, IL, with your favorite Chevy truck. Have further questions about Chevy diesel engines or Chevy in general? Our product specialists are always happy to help via phone at (847) 892-1530 or through our online form.


Engine Specs

Both the Ram 6.7L Cummins and Chevy Duramax® 6.6L turbo diesel engines produce similar performance capabilities built for the heavy loads that jobsites require. The following engine comparison table shows that Chevy’s diesel engine pumps out more horsepower of the two options, making this turbo diesel a true workhorse.

Chevy Pickup Truck Brand Ram
Duramax® 6.6L turbo diesel V8 Engine 6.7L Cummins turbo diesel
445 HP Horsepower 400 HP
910 lb.-ft. Torque 1,000 lb.-ft.

Engine Features

Silverado Duramax® engine

Both the Ram and Chevy diesel engines provide a number of smaller parts to create heavy-duty performers. The Chevy Duramax® and Ram Cummins are equipped with exhaust brakes and engine heaters, features that are important for reliable engine execution. However, the Chevy Duramax® engine is paired with several features not found on the Ram Cummins, such as:

  • Allison® transmission
  • B20-Diesel compatible
  • 3.73 gear ratio
  • Capped fuel fill
  • Tow/Haul mode
  • Auto Grade Braking

Models Available with Diesel Engines

The Chevy Duramax® 6.6L turbo diesel is available with the 2019 and 2020 Silverado 2500HD and 3500HD trucks.

2019 Silverado 2500 HD

2019 red Chevrolet Silverado 2500 HD LTZ

2019 Silverado 3500 HD

2019 black Chevrolet Silverado 3500 HD High Country


Why Choose Chevy Duramax®?

Chevy Duramax® creates dynamic energy that you can feel in your bones every time you rev your engine or hitch a trailer to your truck. Beyond that, the Allison® transmission was made by military tank transmission creators. This transmission is electronically controlled with overdrive to achieve effortless execution, leading to excellent capabilities on a typical haul day.

8 Matching Vehicles Found

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New Price! Black 2020 Chevrolet Silverado 2500HD LTZ 4WD 6-Speed Automatic V8 10-Way Power Driver Seat Adjuster w/Lumbar, 10-Way Power Passenger Seat Adjuster w/Lumbar, 120-Volt Bed Mounted Power Outlet, 120-Volt Instrument Panel Power Outlet, 12-Volt Rear Auxiliary Power Outlet, 15" Diagonal Multicolor Head-Up Display, 170 Amp Alternator, 2 USB Ports & 1 SD Card Reader, 2-Speed Active Electronic AutoTrac Transfer Case, 4.2" Diagonal Color Display DIC, 4G LTE Wi-Fi Hotspot Capable, 8" Diagonal Multicolor Digital Display DIC, Advanced Trailering System, Auto-Dimming Inside Rear-View Mirror, Automatic Emergency Braking, Bed View Camera, Bluetooth® For Phone, BOSE Premium 7-Speaker Sound System, Chevrolet Connected Access Capable, Chrome Front Grille, Chrome Mirror Caps, Color-Keyed Carpeting Floor Covering, Compass, Deep-Tinted Glass, Driver Memory, Dual Charge-Only USB Ports (2nd Row), Electric Rear-Window Defogger, Electrical Lock Control Steering Column, Electronic Cruise Control w/Set & Resume Speed, Floor-Mounted Center Console, Following Distance Indicator, Forward Collision Alert, Front Bucket Seats w/Center Console, Front LED Fog Lamps, Front Rubberized Vinyl Floor Mats, HD Radio, HD Rear Vision Camera, HD Surround Vision w/2 Trailer View Cam Provisions, Heated & Auto-Dim Pwr Vertical Trailering Mirrors, Heated 2nd Row Outboard Seats, Heated Driver & Front Outboard Passenger Seating, Heated Steering Wheel, Hitch Guidance w/Hitch View, Integrated Trailer Brake Controller, IntelliBeam Automatic High Beam On/Off, Keyless Open & Start, Lane Change Alert w/Side Blind Zone Alert, Leather-Wrapped Steering Wheel, LTZ Convenience Package, LTZ Convenience Package II, Manual Tailgate Function w/EZ Lift, Manual Tilt & Telescoping Steering Column, OnStar & Chevrolet Connected Services Capable, Power Door Locks, Power Front Windows w/Driver Express Up/Down, Power Front Windows w/Passenger Express Up/Down, Power Rear Windows w/Express Down, Power Sliding Rear Window w/Defogger, Preferred Equipment Group 1LZ, Radio: Chevrolet Infotainment 3 Premium System, Rear Camera Mirror, Rear Cross Traffic Alert, Rear Rubberized Vinyl Floor Mats, Rear Wheelhouse Liners, Remote Vehicle Starter System, Safety Alert Seat, Safety Package, Safety Package II, SiriusXM Radio, Steering Wheel Audio Controls, Suspension Package, Technology Package, Ultrasonic Front & Rear Park Assist, Unauthorized Entry Theft-Deterrent System, Universal Home Remote, Up-Level Rear Seat w/Storage Package, Ventilated Driver & Front Passenger Seats, Wireless Charging. All prices include all available Incentives. Price is valid for 24 hours. Tax, title, license, doc fee extra. While we try to ensure online merchandising accuracy;dealer not responsible for website errors. Please call to verify price. Pricing includes all available rebates, dealer is not responsible for any pricing errors. Please call for pricing and availability.
 
Pearl 2019 Chevrolet Silverado 2500HD LTZ 4WD Allison 1000 6-Speed Automatic Duramax 6.6L V8 Turbodiesel 110-Volt AC Power Outlet, 4.2" Diagonal Color Display Driver Info Center, 6-Speaker Audio System, Auto-Dimming Inside Rear-View Mirror, Chevrolet 4G LTE, Chevrolet Connected Access, Chrome Bodyside Moldings, Chrome Door Handles, Chrome Mirror Caps, Color-Keyed Carpeting Floor Covering, Deep-Tinted Glass, Digital Steering Assist, Driver & Front Passenger Vanity Mirror Visors, Driver Alert Package, Dual-Zone Automatic Climate Control, Duramax Plus Package, Electric Rear-Window Defogger, Electronic Shift Transfer Case, Engine Block Heater, Forward Collision Alert, Front Halogen Fog Lamps, HD Radio, Heated Leather Wrapped Steering Wheel, Heated Power-Adjustable Outside Mirrors, Integrated Trailer Brake Controller, Leather-Wrapped Steering Wheel, LTZ Plus Package, Manual Tilt-Wheel/Telescoping Steering Column, OnStar & Chevrolet Connected Services Capable, Power Sliding Rear Window w/Defogger, Power-Adjustable Pedals, Preferred Equipment Group 1LZ, Radio: Chevrolet Infotainment System w/Navigation, Rear 60/40 Folding Bench Seat (Folds Up), Rear Wheelhouse Liners, Remote Keyless Entry, Remote Locking Tailgate, Remote Vehicle Starter System, Single Slot CD/MP3 Player, SiriusXM Radio, Standard Suspension Package, Steering Wheel Audio Controls, Trailering Equipment, Ultrasonic Front & Rear Park Assist, Unauthorized Entry Theft-Deterrent System, Universal Home Remote. All prices include all available Incentives. Price is valid for 24 hours. Tax, title, license, doc fee extra. While we try to ensure online merchandising accuracy;dealer not responsible for website errors. Please call to verify price. Pricing includes all available rebates, dealer is not responsible for any pricing errors. Please call for pricing and availability.
 
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Based on model year EPA mileage ratings. Use for comparison purposes only. Your actual mileage will vary depending on how you drive and maintain your vehicle.

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New vehicle pricing includes all offers and incentives available to all. Prices are valid for 24 hours. Prices are plus tax, title, lic & $179.81 doc fee. While great effort is made to ensure the accuracy of the information on this site, errors do occur so please verify information with a customer service rep. This is easily done by calling us at (847) 932-3170 or by visiting us at the dealership.

**With approved credit. Terms may vary. Monthly payments are only estimates derived from the vehicle price with a 72 month term, 4.9% interest and 20% downpayment.

***Selecting 0% offers may be in lieu of incentives. Contact dealer for details.

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Disclaimer:

New vehicle pricing includes all offers and incentives available to all. Prices are valid for 24 hours. Prices are plus tax, title, lic & $179.81 doc fee. While great effort is made to ensure the accuracy of the information on this site, errors do occur so please verify information with a customer service rep. This is easily done by calling us at (847) 932-3170 or by visiting us at the dealership.

**With approved credit. Terms may vary. Monthly payments are only estimates derived from the vehicle price with a 72 month term, 4.9% interest and 20% downpayment.

***Selecting 0% offers may be in lieu of incentives. Contact dealer for details.