GMC gives the AT4 a 2-inch suspension lift, standard four-wheel drive with a two-speed transfer case, a skid plates, Rancho shock absorbers, 18-inch wheels with all-terrain tires (20-inch wheels available), hill descent control and a terrain-selectable traction control system, a locking rear differential, a MultiPro configurable tailgate, a trailer brake controller and trailering package, power-folding and heated mirrors, and driver-seat memory settings, driver assistance features such as parking sensors, blind-spot monitoring and rear cross-traffic alert. There's also the Driver Alert 2 package that further adds forward collision warning with automatic emergency braking and lane keeping assist. CARFAX available online at www.roughlockauto.com.