Ship-through will be offered, allowing customers to order and take delivery from the same dealer. GM will supply vehicles equipped with the 6.0L V-8 engine with hardened valves and valve seats to PSI, which in turn will install the fuel system and other hardware and ship directly to Chevrolet and GMC dealers in all 50 states. All PSI-modified vehicles are covered by Chevrolet and GMC’s five-year/60,000-mile (whichever comes first) limited powertrain warranty.

The expanded lineup brings GM Fleet’s portfolio of alternative fuel, hybrid and EVs to more than a dozen trucks, cars and crossovers. Other recent additions include the Chevrolet Bolt EV; a Duramax 2.8-liter B20-capable Duramax diesel for the Chevrolet Express and GMC Savana vans; and all-new available 6.6-liter B20-capable Duramax diesel engines for the Chevrolet Silverado HD and GMC Sierra HD.

GM Fleet’s partnership with PSI follows customer demand and ongoing investment by companies across the nation in CNG refueling infrastructure.

This month, the US Department of Transportation’s Federal Highway Administration (FHWA) announced 55 routes that will serve as the basis for a national network of “alternative fuel” corridors spanning 35 states. Though the network is nearly 85,000 miles long, more miles will be added in the future to accommodate electric, hydrogen, propane and natural gas vehicles as additional fueling and charging stations are built.

Currently four of the top five “Green Fleets,” as identified by Bobit Media Group, operate CNG-powered vehicles. All of the top 25 fleets use at least two fuels.

Including 2017 and 2018 models, Chevrolet and GMC will offer more than 25 different cars, trucks and vans that use alternate fuels or electric propulsion.