Chevrolet now has the new bi-fuel version of the 2015 Chevrolet Silverado 2500HD double cab and crew cab models on sale and will have the 2500HD regular cab and all 3500HD models on sale in July. The Compressed Natural Gas (CNG) option is available on all Silverado 2500HD configurations and Silverado 3500HD models with single rear wheels.
   Chevrolet’s expanded availability of bi-fuel versions of the new 2015 Silverado 2500HD and 3500HD trucks give North American customers and fleet managers more choices for cleaner-burning compressed natural gas-powered models. Additionally, with CNG currently priced about 62 percent less per gallon than gasoline, a work truck driven 26,000 miles a year can save more than $2,000 annually based on 75-percent CNG usage and comparable efficiency to gasoline.
   “With CNG capability to be offered on all Silverado HD cab configurations, customers have a wider range of choices when it comes to selecting the alternatively fueled truck that matches their needs,” said Ed Peper, U.S. vice president, General Motors Fleet and Commercial. “And for companies and municipalities that maintain multiple trucks in their fleet, the fuel cost savings of CNG can really add up in a year.”
   Depending on their usage habits, many customers can recoup the incremental investment in CNG vehicles within a few years, and the lower fuel cost enables a significant reduction in daily operating costs.
   With the additional driving range enabled by a separate CNG tank, Silverado HD bi-fuel models have a total range of up to 650 miles, meaning less time needed for fill-ups. When equipped with a 4.10 axle ratio, the maximum conventional trailering rating is 13,000 pounds on gasoline or CNG.

   2500HD integrated CNG fuel gauge
   GM warrants and validates the fuel systems of the 2015 Silverado HD bi-fuel trucks. GM’s five-year/100,000-mile powertrain limited warranty covers CNG fuel systems. All major components associated with the CNG system also carry GM service part numbers, for availability throughout the largest dealer network in the United States. That’s not the case with some other manufacturers’ available bi-fuel trucks.
   The unique version of the 6.0L engine – identified by an LC8 engine code – features special hardened valves and valve seats that enable it to run on CNG or gasoline. It is rated at 360 horsepower (268 kW) and 380 lb-ft of torque (515 Nm) on gas, and 301 horsepower (225 kW) and 333 lb-ft of torque (452 Nm) on CNG.
   A separate CNG fuel tank enables the driver to switch between fuels at the flip of a switch. When the CNG tank is depleted, the system automatically switches to gasoline. GM’s tier-one supplier installs the CNG fuel tank and complementing fuel system upgrades at a secondary location. Chevrolet dealers deliver the trucks as they would with any optional content.
   2015 models are equipped with the CNG system come with cargo tie-downs on the tank cover and a single fuel gauge that displays fuel levels for gasoline and CNG.