Chevrolet enthusiasts seeking fuel efficient compact motoring will find two all-new, high-profile sedans in 2011. Evolving from a concept to reality, the heavily-anticipated Chevrolet Volt will become the world's first plug-in hybrid production vehicle. Considered a crucial product to the future of Chevrolet, the Volt runs primarily on an electric motor before relying on a range-extending gasoline powerplant. Attractive to the tradition driving population, Chevrolet's newest 2011 Cruze compact sedan is highly-refined and exceptionally fuel efficient thanks to the Ecotec engine family. Retooled for the purpose of high capacity towing and hauling, the 2011 Chevrolet Silverado 2500HD as well as the one-ton 3500HD is constructed on an all-new frame and offers a more potent Duramax turbodiesel engine. Following the high-profile return of the Chevrolet Camaro in 2011 as a hardtop, a convertible model now provides an open-air pony car riding experience. With the 2011 Chevrolet Malibu, smoother power delivery is now offered on all models through a standard six-speed automatic transmission. Several Chevrolet products have been upgraded with available OnStar 9.0 in 2011.