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.

Duramax I-6
Also calledLM2(until 2024)
ConfigurationInline 6
Displacement2,993 cubic centimetres (182.6 in3)
Cylinder bore84 millimetres (3.3 in)
Piston stroke90 millimetres (3.5 in)
Cylinder block materialCast aluminum
Cylinder head materialCast aluminum
Valvetrain drive systemChains
Compression ratio15.0: 1
Operating principleDiesel
Fuel systemCommon rail direct fuel injection
ManagementGM D1P-E98
Fuel type
  • ultra-low-sulfur diesel
  • B20 biodiesel
  • EN 590 diesel
Power output277–305 horsepower (207–227 kW)
Specific power92.3-101.7 hp/L
Torque output460–495 pound-feet (624–671 N⋅m)
Length908 millimetres (35.7 in)
Width914 millimetres (36.0 in)
Height903 millimetres (35.6 in)
Dry weight212 kilograms (467 lb)
Emissions target standardTier 3 Bin 160

Engine details edit

  • 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.[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 edit

  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.