The Silverado HD and Sierra 2500 HD Vortec 6.0L V8 engine runs on gasoline or compressed natural gas (CNG) and switches between the two fuels without affecting performance. The CNG and gasoline tanks have a combined range of 650 miles (1.046 km), the longest standard bi-fuel range of any original equipment automaker.

The Type-3 single-tank CNG system in the Silverado HD and Sierra 2500 HD is designed to retain more bed space than any competing bi-fuel truck from an Original Equipment Manufacturer, GM says. The pickups are available in standard and long-box and two-or-four wheel drive in the extended cab models.

At Chesapeake, we are converting our fleet of more than 5,000 vehicles to run on natural gas, and having options from GMC and Chevy is critical to help us reach our conversion goal. Following our full conversion, we will save $11 million to $12 million annually on fuel costs.

—Nate Pumphrey, Chesapeake Energy Corp. director of Fleet Operations

The bi-fuel pickups are ordered from the factory, sent to the Tier One supplier IMPCO for installation of the CNG bi-fuel delivery and storage system and then delivered by GM transportation to the dealer or to an upfitter for customer-ordered modifications.

The bi-fuel option is priced at $11,000 above the suggested retail price of the base vehicle. The entire gaseous fuel system meets GM’s quality, durability and safety testing. The trucks will be covered by GM’s three-year, 36,000-mile new vehicle limited warranty and five-year, 100,000-mile limited powertrain warranty and vehicle emissions warranty. The vehicle meets all Environmental Protection Agency (EPA) and California Air Resources Board (CARB) emission certification requirements.