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3.0L LM2 Duramax TurboDiesel Specifications & Information

3.0L Duramax engine specs, tow capacity, and fuel economy ratings.

Specifications on GM’s new 3.0L Inline-Six LM2 Duramax Available on 2020+ Silverado 1500 & Sierra 1500 Trucks

2020 Chevrolet Silverado 1500 with the 3.0L Duramax Diesel
Photo Courtesy of Chevrolet Media

Although GM was the first to offer a diesel in the mid-size truck market found in the Duramax Colorado or Canyon, they are the last to adopt a half-ton diesel. GM will be releasing their first diesel variant of the 1/2 ton trucks, in the form of a 3.0L Inline-six LM2 Duramax engine. Unlike Ford’s 3.0L V6 Powerstroke or FCA’s 3.0L V6 EcoDiesel, the Duramax will feature an inline-six cylinder design. The I-6 3.0L Duramax produces 277 horsepower and 460 lb/ft of torque. Despite these pretty impressive numbers, achieving higher horsepower wasn’t GM’s goal for the new 3.0L Diesel, fuel economy was. According to EPA estimates, 2wd trucks equipped with the 3.0L Duramax can get up to 33 miles per gallon on the highway. That’s a significant improvement over their gasoline powered counterparts. Check out a full list of 3.0L LM2 Duramax Specifications below.

3.0L Duramax Engine Specifications & Information
3.0L Duramax

3.0L LM2 Duramax Specifications (Silverado 1500 & Sierra 1500)

Engine Design:Inline-6 Cylinder
Vin Code:T
Transmissions:10L80 10-Speed Automatic Transmission
with a centrifugal pendulum absorber
torque converter
Displacement:3.0 Liters
Engine Weight:Unknown
Bore:3.30 inches or 84 mm
Stroke:3.54 inches or 90 mm
Cylinder Head:Aluminum
Engine Block:Aluminum
Firing Order: 1-5-3-6-2-4
Compression Ratio:15.0:1
Fuel Injection:High Pressure, Common Rail
Direct Injection 36,250 psi
TurboCharger:Holset Variable Geometry Turbocharger (VGT)
with new heavy duty bearings, and
new compressor-side housing
Valvetrain:DOHC Design (Dual Overhead Camshafts)
4 valves per cylinder
Pistons: hypereutectic aluminum pistons
Engine Oil Capacity:7 Quarts or 6.6 Liters (With Filter)
Coolant Capacity:20.2 Quarts or 19.1 Liters
DEF Tank Size:5.3 Gallons
Fuel:B20 Biodiesel Compatible, Ultra-low Sulfur Diesel
Fuel Tank Size:Varies by Cab Choice. See Chart Below.
Max Engine Speed:5,100 RPM
Horsepower (Varies):277 Horsepower
Torque (Varies):460 lb/ft

3.0L LM2 Duramax Fuel Economy

GM’s 3.0L Duramax Diesel engine will give Silverado 1500 and Sierra 1500 owners up to an estimated 33 miles per gallon on the highway and 23 in the city. These high fuel economy ratings will be on two-wheel drive models. Four-Wheel Drive models are capable of 29 miles per gallon on the highway and 23 miles per gallon in the city.

Fuel Tank Size 2020 Silverado 1500 & 2020 Sierra 1500

Regular CabDouble CabCrew Cab
28.3 Gallons24 Gallons24 Gallons

3.0L Duramax Tow Capacity

While the 3.0L Duramax does provide higher estimated fuel ratings than the 3rd generation EcoDiesel or the 3.0L Powerstroke F150, it offers less tow capacity. Max tow capacity for the 2020 Silverado 1500 or 2020 Sierra 1500 is 9,300 lbs. Tow capacity will vary according to your trucks specifications, so it’s important to consult your owners manual or GM directly to get your exact max tow capacity.

Want to learn more about the new 3.0L Duramax?

Check out our other articles about the 3.0L Duramax. You can also visit the Chevrolet or GMC press release about the new 3.0L Duramax by clicking one of the links below.

Chevrolet Press Release

GMC Press Release

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