The 2011 Silverado HD comes with improved Duramax diesel engine and Allison transmission, a highway cruising range of up to 680 miles and new B20 biodiesel capability. The power unit is now capable of developing 397 horsepower and 765 lb-ft of torque.
However, aside from the 6.6-liter Duramax diesel configuration that is mated to an Allison 1000 six-speed automatic transmission, there is also a Vortec 6.0-liter with Hydramatic six-speed automatic gearbox available as well.
"Heavy duty pickup customers are some of the most knowledgeable out there, and we heard them loud and clear. They want maximum power and capability at the best value possible," Product Director Maria Rohrer, said in a release. "We delivered huge increases in power and capability while actually improving our fuel economy with the Duramax diesel engine – all while maintaining current pricing."
The vehicle comes with features such as trailer sway control, smart exhaust braking and hill start assist, among others. Furthermore, the trailering capacity has also been increased to 20,000 pounds (9,072 kg), and payload capacity to 6,335 pounds (2,873 kg).
Other highlights for the new model include the all-new, fully-boxed frame assemblies, stronger independent and new asymmetrical leaf-spring rear suspensions, a new, exclusive exhaust brake system, larger brakes, improved handling and steering and a 170-degree-opening rear access doors on extended cab models.
The Silverado HD will be offered in work truck, LT and LTZ trim levels, and will begin production in May. Delivery to dealers is expected in early June.