General Motors has announced compatibility with the B20 biodiesel for the 6.6-liter turbodiesel Duramax V8 engine from 370 hp. The B20 is the result of a mixture of 20% biodiesel and 80% of diesel fuel standards, thereby reducing NOx emissions and is available in the United States in many filling stations. The Duramax engine has been thoroughly revised for the occasion, with new gaskets, new fuel filter and a system to heat the fuel, the filter provides an injector dedicated management and electronics has been revised.

The previous version of the engine was able to use only biodiesel B5.

The new Duramax engine compatible with biodiesel B20 debut on 2011 model year Chevrolet Silverado and GMC Sierra pickups and even SUVs Chevrolet Express and GMC Savana. General Motors has always paid much attention to the use of biofuels, as evidenced by his efforts in spreading the petrol versions with compatibility for bioethanol E85, already sold 4 million copies.