Tow all of the things with the beefier 6.6-liter turbodiesel V8.

The 2017 Chevy Silverado HD and 2017 GMC Sierra HD have a new 6.6-liter Duramax turbodiesel V8 engine that’s even more powerful and tougher than ever. The mill produces 445 horsepower and 910 pound-feet of torque, with the latter available at just 1,600 rpm.

Those figures are up over the 2016 HD Duramax’s ratings of 395 hp and 795 lb-ft. Pretty much every part of the engine has been redesigned for improved strength and power: the engine block, heads, and crankshaft are all new, as is the boost control system. A damped oil pan and updates to the rocker covers help quell idle noise by a claimed 38 percent, and the oil cooler is said to have a 50-percent greater capacity. The engine also has a new air intake system that uses a hood scoop to draw more fresh, cooler air into the turbocharger.

The engine is paired to the same Allison six-speed automatic transmission as before, albeit with a new torque converter to cope with the increased torque rating.

Chevy and GMC say the new Duramax engine will start in -20°F temperatures in as little as three seconds, thanks to ceramic glow plugs. It’s also capable of running on B20 biodiesel fuel.

New tow and payload ratings for the trucks have not yet been announced.

Source: Chevrolet

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