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.Archived at Ghostarchive and the Wayback Machine:
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.
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