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Duramax I6 engine

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See also: Duramax

The Duramax I6 engine is a diesel engine available in select models of General Motors light-duty trucks and SUVs. Applications include the Chevrolet Silverado/GMC Sierra 1500, Chevrolet Suburban/GMC Yukon XL, Chevrolet Tahoe/GMC Yukon, and Cadillac Escalade (both short wheelbase and ESV). The engine was developed together with Opel, who are manufacturing three- and four-cylinder versions displacing 1.5 and 2.0 liters, using the same engine architecture.

Reciprocating internal combustion engine
Duramax I-6
Overview
Also calledLM2(until 2024)
LZ0(2023-present)
Layout
ConfigurationInline 6
Displacement2,993 cubic centimetres (182.6 in)
Cylinder bore84 millimetres (3.3 in)
Piston stroke90 millimetres (3.5 in)
Cylinder block materialCast aluminum
Cylinder head materialCast aluminum
ValvetrainDOHC
Valvetrain drive systemChains
Compression ratio15.0: 1
Combustion
Operating principleDiesel
Fuel systemCommon rail direct fuel injection
ManagementGM D1P-E98
Fuel type
  • ultra-low-sulfur diesel
  • B20 biodiesel
  • EN 590 diesel
Output
Power output277–305 horsepower (207–227 kW)
Specific power92.3-101.7 hp/L
Torque output460–495 pound-feet (624–671 N⋅m)
Dimensions
Length908 millimetres (35.7 in)
Width914 millimetres (36.0 in)
Height903 millimetres (35.6 in)
Dry weight212 kilograms (467 lb)
Emissions
Emissions target standardTier 3 Bin 160

Engine details

  • Displacement: 3.0L
  • Configuration: Inline 6
  • Horsepower: 277-305 hp @ 3750 rpm
  • Torque: 460-495 ft-lb (624-671 nm) @ 1500 rpm
  • RPO code: LM2(until 2024), LZ0(2023-present)
  • Intercooler: liquid-to-air
  • Block: Aluminum
  • Head: Aluminum
  • Crankshaft: Forged Steel
  • Rods: Forged
  • Pistons: Hypereutetic cast aluminum alloy - LZ0 upgraded to steel pistons
  • Cylinder liners: Iron

The engine's timing components are located at the rear of the engine, and feature timing chains to drive the camshafts and high pressure fuel pump, and a wet belt to drive the oil pump.

Most of the development and engineering work for the LM2 Duramax, as well as primary calibration took place in Turin, Italy. The engine is being produced at Flint Engine Operations. A test by Car and Driver showed 40 MPG is possible when hypermiling.

References

  1. Archived at Ghostarchive and the Wayback Machine: What you don't know about the 3.0-liter Duramax diesel. YouTube.
  2. "Just do It! - 2020 Silverado 1500 3.0L Duramax Diesel".
  3. Gibbs, Nick (23 June 2018). "GM's hopes for a diesel revival start in Turin". Automotive News Europe. Retrieved 27 December 2019.
  4. "GM Corporate Newsroom - United States - Company".
  5. "2020 Chevy Silverado 1500 3.0L Duramax is Smoother Than it is Capable". 10 December 2019.
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Type 1980s 1990s 2000s 2010s 2020s
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4
Gasoline Flat 4 EJ
Inline 3 G S-TEC
Family 0
SGE
E-Turbo
4 Opel OHV engine GM Ecotec
Iron Duke Family 0
Opel CIH Saab H AZ
G Quad 4 ZZ ZR
Vauxhall Slant-4 A S-TEC
Holden Starfire Saturn Atlas MGE
Family II SGE
Family 1
122 GM L3B
X G
J
5 Atlas
6 Chevrolet Turbo-Thrift
Red Blue Black RB30 Atlas
Opel CIH E-TEC
V Buick/3800
Chevrolet 90°
GM 60° Gen V 90°
Shortstar High Value
Opel 54° High Feature
H
J
8 Buick
Cadillac OHV Northstar Blackwing
High Technology
Big Block
Small Block Gemini
LS/LT
Holden
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Diesel Detroit
Oldsmobile Duramax
6 Oldsmobile DMAX
Inline M51 Duramax
Detroit 60 6H
4 JTD
RA Family Z
E Circle L
Family II Family B
A
MDE
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