6HK1/Duramax LG4 • Displacement: • Bore and stroke: • Block: gray iron • Cylinder head: cast iron • Fuel cutoff: 2400 rpm • Aspiration:
Turbocharged and
intercooled • Valvetrain:
SOHC 24-valve • Compression: 17.5:1 (17.0:1 for ) • Injection:
high-pressure common-rail direct injection • Power/torque: ,
6HH1 • Displacement: • Bore and stroke: • Aspiration: Naturally aspirated • Valvetrain: SOHC 24-valve • Compression ratio: 18.5:1 • Injection: Reformed Bosch, inline injection pump with automatic timer, and all-speed mechanical governor • Power/torque: ,
6HE1 • Displacement: • Bore and stroke: • Aspiration: naturally aspirated or turbocharged • Valvetrain: direct injection, SOHC 24-valve • Compression ratio: 16.9:1 • Injection: direct injection • Power/torque: , ==Engine variants==