By on September 28, 2016

2017 chevrolet silverado 2500HD

General Motors quickly deleted the power figures for its new 6.6-liter Duramax turbodiesel V8 after they were posted to the GM Powertrain website, but we now have confirmation of the heavy-duty engine’s output.

TTAC’s Matthew Guy has just sent us the figures from the Texas Motor Speedway in Fort Worth, where GM is debuting its 2017 heavy duty pickups. (Read More…)

By on September 26, 2016

2017 GMC Sierra Denali 2500HD

A document containing official horsepower and torque numbers for General Motors’ new 6.6-liter V8 Duramax turbo-diesel was found buried on the GM Powertrain website — before the company quickly deleted it(Read More…)

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