# Duramax I6 engine

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See also: [Duramax](/source/Duramax_(disambiguation))

Reciprocating internal combustion engine

Duramax I-6 Overview Manufacturer General Motors Also called LM2 (until 2024) LZ0 (2023-present) Layout Configuration Inline 6 Displacement 2,993 cubic centimetres (182.6 in3) Cylinder bore 84 millimetres (3.3 in) Piston stroke 90 millimetres (3.5 in) Cylinder block material Cast aluminum Cylinder head material Cast aluminum Valvetrain DOHC Valvetrain drive system Chains Compression ratio 15.2: 1 Combustion Operating principle Diesel Turbocharger One Fuel system Common rail direct fuel injection Management GM D1P-E98 Fuel type ultra-low-sulfur diesel B20 biodiesel EN 590 diesel Output Power output 277–305 horsepower (207–227 kW) Specific power 92.3-101.7 hp/L Torque output 460–495 pound-feet (624–671 N⋅m) Dimensions Length 908 millimetres (35.7 in) Width 914 millimetres (36.0 in) Height 903 millimetres (35.6 in) Dry weight 212 kilograms (467 lb) Emissions Emissions target standard Tier 3 Bin 160

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

## Engine details

- Displacement: 3.0L

- Configuration: [Inline 6](/source/Straight-six_engine)

- [Horsepower](/source/Horsepower): 277-305 hp @ 3750 rpm

- [Torque](/source/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](/source/Crankshaft): Forged Steel

- Rods: Forged

- Pistons: [Hypereutetic](/source/Hypereutectic_piston) 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. This arrangement makes inspection and replacement very difficult and expensive.[1]

Most of the development and engineering work for the LM2 Duramax, as well as primary calibration took place in [Turin](/source/Turin), Italy.[2][3] The engine is being produced at [Flint Engine Operations](/source/Flint_Engine_Operations).[4] A test by [Car and Driver](/source/Car_and_Driver) showed 40 MPG is possible when [hypermiling](/source/Hypermiling).[5]

## References

1. **[^](#cite_ref-1)** Archived at [Ghostarchive](https://ghostarchive.org/varchive/youtube/20211209/NFNsg7bCtdA) and the [Wayback Machine](https://web.archive.org/web/20200719184044/https://www.youtube.com/watch?v=NFNsg7bCtdA): [*What you don't know about the 3.0-liter Duramax diesel*](https://www.youtube.com/watch?v=NFNsg7bCtdA). *[YouTube](/source/YouTube)*.

1. **[^](#cite_ref-2)** ["Just do It! - 2020 Silverado 1500 3.0L Duramax Diesel"](https://www.gm-trucks.com/forums/topic/225182-just-do-it-2020-silverado-1500-30l-duramax-diesel/). June 24, 2019.

1. **[^](#cite_ref-3)** Gibbs, Nick (June 23, 2018). ["GM's hopes for a diesel revival start in Turin"](https://europe.autonews.com/article/20180623/COPY/306239996/gm-s-hopes-for-a-diesel-revival-start-in-turin). *Automotive News Europe*. Retrieved December 27, 2019.

1. **[^](#cite_ref-4)** ["GM Corporate Newsroom - United States - Company"](https://media.gm.com/media/us/en/gm/company_info/facilities/powertrain/flint.html).

1. **[^](#cite_ref-5)** ["2020 Chevy Silverado 1500 3.0L Duramax is Smoother Than it is Capable"](https://www.caranddriver.com/reviews/a28148602/2020-chevrolet-silverado-3-0l-diesel-drive/). December 10, 2019.

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Adapted from the Wikipedia article [Duramax I6 engine](https://en.wikipedia.org/wiki/Duramax_I6_engine) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Duramax_I6_engine?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.