445 horsepower and 910 pound-feet of torque: those appear to be the official numbers of GM’s new 6.6L L5P Duramax turbo-diesel V-8 engine destined for GM’s 2017 model year heavy duty Chevy and GMC pickup trucks.
The figures come to us from a rather unexpected and surprising source: General Motors’ 2017 global propulsion product guide.
The more detailed specs include:
- Bore x stroke: 103.0 x 99.0
- Power: 445 hp (332kW) @ 2800*
- Torque: 910 pound-feet (1234 Nm) @ 1600*
That little asterisk by the power and torque numbers? It means that the figures are SAE J1349 certified.
Set to be manufactured at the GM-Isuzu D-MAX plant in Moraine, Ohio, USA, the new Duramax 6.6L L5P engine will be available in the Heavy Duty variants of the 2017 Chevrolet Silverado and GMC Sierra. It will continue being paired with the Allison 1000 transmission.
Update: an announcement from General Motors has officially confirmed these figures as part of the unveiling of GM’s 2017 model year Heavy Duty pickup trucks.