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A document containing official horsepower and torque numbers for GM’s brand new 6.6-liter V8 Duramax turbo-diesel was found buried on the GM Powertrain website – before the company quickly deleted it.

GM’s new 2017 heavy-duty pickup trucks will wade into the nuclear torque war with a whopping 910 pound-feet of twist, with peak torque coming on at just 1,600 rpm. Horsepower is up by nearly 50 to 445 hp at 2,800 rpm – thanks in part to a new turbo design – while the 103 mm bore x 99 mm stroke remains identical.

The engine’s 910 lb-ft of torque puts it middle of the road between the Ford Super Duty’s 925 lb-ft and the Cummins Ram at 900 lb-ft, however, its 445 hp rating leaves GM with the horsepower crown versus Ram’s 385 hp and Ford’s 440 hp.

The new L5P Duramax is slotted for production at the GM-Isuzu plant in Moraine, Ohio, and will see action in both Heavy Duty Silverado and Sierra twins. The accidental release comes just days before GM’s new HD trucks are set to officially debut at the 2016 State Fair of Texas, where transmission and towing specs should be made available.
Read more about GM Quietly Releases Then Deletes Specs for HD 2017 Duramax Turbo-Diesel at
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