General Motors has announced that its 2014 Chevrolet Silverado 2500 HD and GMC Sierra 2500 HD will both be available in crew cab configuration with a bi-fuel powerplant.

The bi-fuel pickups run on gasoline or compressed natural gas (CNG) and seamlessly switch between the two fuels for a combined range of 650 mi., GM said. They are available in standard and long-box and two- or four-wheel drive.

“Our commercial and retail customers know they can go the distance with our bi-fuel pickup trucks without range anxiety,” said Ed Peper, General Motors U.S. vice president of Fleet and Commercial Sales. “Drivers said they wanted the flexibility of a bi-fuel pickup so they can drive without restriction, and still have the peace of mind that GM’s warranty provides.”

As an extension of GM’s manufacturing process, the single-tank CNG system is installed by a first-tier supplier, following GM’s process and standards. Once the fuel system is in place, GM will deliver the trucks to a dealer or upfitter for customer-ordered modifications.

The trucks are covered by GM’s three-year, 36,000-mile new vehicle limited warranty and five-year, 100,000-mi. limited powertrain warranty and vehicle emissions warranty. 

The bi-fuel option is priced $11,000 above the suggested retail price of the base vehicle, and may be purchased through Chevrolet and GMC dealers. The vehicle meets all Environmental Protection Agency and California Air Resources Board emission certification requirements.