The Express 3500 passenger and cargo vans are available with a 135-inch or a 155-inch wheelbase. There are three available engines for the Express 3500 lineup: a 280-hp Vortec 4.8-liter FlexFuel V8 available on the cargo vans only, a 323-hp Vortec 6.0-liter FlexFuel V8, and a 525 lb.-ft. of torque Duramax Diesel 6.6-liter V8. 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 15 passengers and offer several convenient options. Cargo vans are available in Work Van 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.