Ready to take on the day, our diesel-powered 2026 GMC Sierra 2500HD AT4X Crew Cab 4X4 is a terrific trail machine made for hard work in Summit White! Motivated by a TurboCharged 6.6 Litre DuraMax Diesel V8 offering 470hp and 975lb-ft of torque to a 10 Speed Allison Automatic transmission. This Four Wheel Drive truck can also bring its bold capability off the beaten path with an off-road suspension, a 2-inch lift kit, a full-locking rear diff, and Multimatic DSSV dampers. Our Sierra turns heads with animated LED headlamps, power assist steps, a power sunroof, a spray-on bedliner, alloy wheels, and a MultiPro tailgate with a built-in sound system. Style and comfort enhance our AT4X cabin with heated/ventilated full-grain leather power front seats and heated rear seats, a heated leather steering wheel, dual-zone automatic climate control, keyless access/ignition, remote start, and a power rear window. Enjoy high-tech infotainment with a 12.3-inch driver display, a 13.4-inch touchscreen, 12-speaker Bose audio, Google Built-in, WiFi compatibility, Apple CarPlay®/Android Auto®, Bluetooth®, and wireless charging. GMC helps you stay safe with a surround-view system, a bed-view camera, trailer blind-spot monitoring, automatic braking, parking sensors, lane-departure warning, trailer-sway control, hill-start assistance, and more. When tough jobs call, our Sierra 2500 AT4X is the answer! Save this Page and Call for Availability. We Know You Will Enjoy Your Test Drive Towards Ownership! Serving the Westman area for decades, our award-winning dealership and our professional sales staff are here to make your auto shopping experience hassle-free.