| Manufacturer | General Motors |
|---|---|
| Aka | LM2 (until 2024) LZ0 (2023-present) |
| Configuration | Inline 6 |
| Displacement | 2,993 cubic centimetres (182.6 cu in) |
| Bore | 84 millimetres (3.3 in) |
| Stroke | 90 millimetres (3.5 in) |
| Block | Cast aluminum |
| Head | Cast aluminum |
| Valvetrain | DOHC |
| Timing | Chains |
| Compression | 15.2: 1 |
| Turbocharger | One |
| Operating principle | Diesel |
| Fuelsystem | Common rail direct fuel injection |
| Management | GM D1P-E98 |
| Fueltype |
|
| Power | 277-305 hp kW |
| Specpower | 92.3-101.7 hp/L |
| Torque | 460-495 lbft Nm |
| Length | 908 millimetres (35.7 in) |
| Width | 914 millimetres (36.0 in) |
| Height | 903 millimetres (35.6 in) |
| Weight | 212 kilograms (467 lb) |
| Emissions level | Tier 3 Bin 160 |
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.
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. 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, Italy.[2][3] The engine is being produced at Flint Engine Operations.[4] A test by Car and Driver showed 40 MPG is possible when hypermiling.[5]
References
- ^ Archived at Ghostarchive and the Wayback Machine: "What you don't know about the 3.0-liter Duramax diesel". YouTube
- ^ "Just do It! - 2020 Silverado 1500 3.0L Duramax Diesel". 24 June 2019.
- ^ Gibbs, Nick (23 June 2018). "GM's hopes for a diesel revival start in Turin". Automotive News Europe. Retrieved 27 December 2019.
- ^ "GM Corporate Newsroom - United States - Company"
- ^ "2020 Chevy Silverado 1500 3.0L Duramax is Smoother Than it is Capable". 10 December 2019.