2.8L Duramax LWN

2.8L Duramax LWN Engine Specs & Information

General Motors was a major stakeholder in Italian engine manufacturer VM Motori during the development of the A428. Fiat Chrysler Automobiles (FCA) would later buy their stake in the the company, however GM retained licensing rights to the A428 in the United States as part of the agreement. All 2.8L Duramax diesels are assembled at the General Motors Rayong Complex in Rayong, Thailand. The engine is rated at a peak 181 horsepower and 369 lb-ft of torque. Since its inception, the horsepower and torque ratings remained unchanged, likely due to a lack of competition in the mid-size segment.

GMC Canyon and Chevrolet Colorado applications employ a GM 6L50 six speed automatic transmission, while Express and Savana vans utilize a GM 8L90 eight speed automatic transmission to manage the engine's power. The 2.8L Duramax features a Denso high pressure common rail injection system with solenoid-type fuel injectors, a Honeywell (Garrett) variable geometry turbocharger, and dual overhead camshafts with 4 valves per cylinder. GM retired the 2.8L Duramax diesel following the 2022 model year, likely to focus on small displacement, power dense gasoline engine platforms.

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 - 2022 Chevrolet Colorado 2016 - 2022 GMC Canyon 2017 - 2022 Chevrolet Express 2500, 3500 2017 - 2022 GMC Savana 2500, 3500
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 specified
B50 Life	Not specified
Bore	3.70 inches (94.0 mm)
Stroke	3.94 inches (100.0 mm)
Bore/Stroke Ratio	0.94 (undersquare)
Compression Ratio	16.5:1
Firing Order	1 - 3 - 2 - 4
Cylinder Numbers
Engine Block Material	Grey cast iron
Cylinder Head Material	Cast aluminum alloy
Intake Manifold Material	Composite
Exhaust Manifold Material	Cast iron
Injection System	Direct injection Denso high pressure common rail Solenoid type fuel injectors 29,000 psi max injection pressure (2,000 bar)
Aspiration	Turbocharged and intercooled (air-to-air intercooler) Honeywell/Garrett variable geometry turbocharger (VGT), water cooled
Reciprocating Assembly	Forged steel crankshaft Forged steel connecting rods Aluminum alloy pistons Powdered metal camshafts with sintered cam lobes
Valvetrain	Dual overhead camshafts (DOHC) 4 valves per cylinder (16 valve)
Cold Start Aid(s)	Traditional glow plug system, 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
Emissions Equipment	Positive crankcase ventilation (PCV) Exhaust gas recirculation, cooled (EGR) Diesel oxidation catalyst (DOC) Diesel particulate filter (DPF) Selective catalytic reduction (SCR) with DEF injection
Horsepower	181 hp @ 3,400 rpm
Torque	369 lb-ft @ 2,000 rpm
Fuel Economy	4x2 Colorado/Canyon (2019 -2022)	20 mpg city, 30 mpg highway, 23 mpg combined
	4x4 Colorado/Canyon (2019 - 2022)	19 mpg city, 28 mpg highway, 22 mpg combined
Max Engine Speed	5,000 rpm
Engine Weight	~ 520 lbs
Engine Dimensions	Length	25.4 inches (645 mm)
	Width	25.8 inches (655 mm)
	Height	34.1 inches (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