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 | |
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Overview | |
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 | 15.0: 1 |
Combustion | |
Operating principle | Diesel |
Fuel system | Common rail direct fuel injection |
Management | GM D1P-E98 |
Fuel type |
|
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 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]
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