The Express 2500 passenger van features a 135-inch wheelbase, while the cargo van is available with a 135-inch or a 155-inch wheelbase. There are three available engines for the Express 2500 lineup: a 280-hp Vortec 4.8-liter FlexFuel V8, a 323-hp Vortec 6.0-liter FlexFuel V8, and a 525 lb.-ft. of torque Duramax Diesel 6.6-liter V8 available on the cargo van only. All of the engines are teamed with a six-speed automatic transmission. Passenger vans are available in LS or LT trim, can accommodate up to 8 passengers and offer several convenient options. Cargo vans are available in Work Van or Upfitter trim and provide an excellent base for a multi-purpose utility vehicle that can be equipped to suit your comfort needs, or modified for your workplace requirements. Safety features include 4-wheel anti-lock disc brakes, Stabilitrak, and front airbags with a side curtain airbag on the passenger vans.For 2011, a USB audio port and Bluetooth wireless connectivity for mobile phones are available.