GM 2.8L Duramax LWN

2.8L Duramax LWN Engine Specs & Information

The 2.8L Duramax was introduced for the 2016 model year to GMC Canyon and Chevrolet Colorado midsize pickup models. In 2017, the 2.8L Duramax became available in the Chevrolet Express and GMC Savana cargo/passenger van. While the fuel economy ratings have changed since its inception, the 2020 Colorado/Canyon earned EPA rated 20 mpg city, 30 mpg highway fuel economy ratings for two wheel drive trucks. The Colorado and Canyon are the only midsize pickups in the domestic market that offer a diesel engine option, although Ford, Ram, and GM all offer diesel engines in their respective 1/2 ton models.

The 2.8L Duramax is based on the VM Motori A428; at the time of its development, GM was a major stakeholder in Italian manufacturer VM Motori. Fiat Chrysler Automobiles (FCA) would later buy GM's entire stake in VM Motori, however GM retained the right to manufacturer the 2.8L diesel for applications in the U.S. The 2.8L Duramax is manufactured at GM's assembly plant in Rayong, Thailand.

The 2.8L Duramax is an inline 4 cylinder, turbocharged diesel featuring a high pressure common rail injection system and dual overhead camshafts. It produces a peak 181 horsepower and 369 lb-ft of torque in both Colorado/Canyon and Express/Savana applications. The GMC Canyon/Chevrolet Colorado utilize a 6 speed automatic transmission (GM 6L50) while the Chevrolet Express/GMC Savana transmit power through an 8 speed automatic transmission (GM 8L90).

2.8L Duramax I-4 Engine Specs

Engine:

2.8L Duramax

Type:

4 stroke diesel

Manufacturer:

General Motors [1] (VM Motori design, see footnote)

Assembly Plant:

GM Rayong Plant, Rayong Thailand

Applications/Production Years:

2016 - current Chevrolet Colorado
2016 - current GMC Canyon
2017 - current Chevrolet Express
2017 - current GMC Savana

GM RPO Code:

LWN

Displacement:

2.778 liters (2.8 liters nominal), 169.45 CID (170 CID nominal)

Configuration:

Inline 4 cylinder

B10 Life:

Not rated

B50 Life:

Not rated

Bore:

3.70 in (94 mm)

Stroke:

3.94 in (100 mm)

Bore/Stroke Ratio:

0.94 (slightly undersquare)

Compression Ratio:

16.5 : 1

Firing Order:

1 - 3 - 2 - 4

Engine Block Material:

Grey cast iron

Cylinder Head Material:

Cast aluminum alloy

Intake Manifold Material:

Composite

Injection System:

Direct injection, 2000 bar high pressure common rail (29,000 psi), Piezoelectric fuel injectors

Aspiration:

Turbocharged, water cooled variable geometry turbocharger (VGT), intercooled

Reciprocating Assembly:

Forged steel crankshaft, forged steel connecting rods, aluminum pistons, powdered metal camshaft with sintered cam lobes, piston cooling jets

Valvetrain:

DOHC (dual overhead camshaft), 16 valve (4 valves per cylinder)

Cold Start Aid(s):

Glow plugs, 1 per cylinder

Engine Oil Capacity:

6 quarts w/ filter change

Engine Oil Spec [2]:

Ambient temp > -20° F

SAE 5W-30

Ambient temp < -20° F

SAE 0W-40

Fuel:

Ultra-low sulfur diesel fuel (ULSD), up to B20 biodiesel compatible

Horsepower:

181 hp @ 3,400 rpm

Torque:

369 lb-ft @ 2,000 rpm

Fuel Economy:

4x2 Colorado/Canyon (2020 MY)

20 mpg city, 30 mpg highway

4x4 Colorado/Canyon (2020 MY)

19 mpg city, 28 mpg highway

Max Engine Speed:

5,000 rpm

Engine Weight:

~ 520 lbs

Engine Dimensions:

Length:

25.4 in (645 mm)

Width:

25.8 in (655 mm)

Height:

34.1 in (865 mm)

[1] 2.8L Duramax is based on the VM Motori A428; GM retained a license to manufacturer the 2.8L diesel after FCA acquired GM's ownership in VM Motori.

[2] SAE 0W-40 engine oil is listed as suitable for any temperature, however is only recommended as a cold weather engine oil. If ambient temperature is expected to drop below -20° F, 0W-40 engine oil should be used. For all other operating conditions, 5W-30 is the preferred engine oil viscosity. A full synthetic engine oil is recommended, but not required by GM.

2.8L Duramax Horsepower & Torque Curve

2.8L Duramax horsepower and torque graph

2.8L Duramax diesel horsepower and torque graph
Source: gmpowertrain.com