The 2013 Express Cutaway 3500/4500 includes a number of enhancements over previous models including a navigation radio, rear-vision camera system, and higher GVWR (up to 14,200 lbs). Features include gas and diesel engine options, six-speed automatic transmissions, three wheelbases (139 in., 159 in., and 177 in.), and four-wheel anti-lock disc brakes. Options include locking rear differential and OnStar navigation. It can handle several upfit types including utility/service, ambulance/rescue, and shuttle or school bus.