Our 2026 GMC Sierra 1500 AT4X Crew Cab 4X4 is one tough trail machine in Summit White! Motivated by a 6.2 Litre EcoTec3 V8 delivering 420hp to a 10 Speed Automatic transmission. Our off-road-ready Sierra AT4X truck features a factory off-road suspension with a 2-inch lift and Multimatic DSSV dampers, plus a rear electronic-locking differential for enhanced traction. With its diesel powertrain, it achieves about approximately 11.8L/100km on the highway. Designed for rugged terrain, this Sierra stands strong with robust skid plates and a MultiPro tailgate for serious capability. Kick off your next adventure in bold style from our AT4X cabin, featuring heated and ventilated leather power front seats, heated rear outboard seats, a heated leather-wrapped steering wheel, dual-zone automatic climate control, and a power-sliding rear window. Command your drive with a 13.4-inch touchscreen and a 12.3-inch digital driver display supported by Google Built-In, wireless Android Auto®/Apple CarPlay®, Bluetooth®, wireless charging, WiFi hotspot capability, voice recognition, and a 12-speaker Bose premium sound system. Impressive GMC safety systems start with a head-up display, a digital rearview mirror, hill descent control, automatic braking, trailer blind-spot monitoring, adaptive cruise control, HD surround vision, and more. Crafted to exceed expectations, our Sierra 1500 AT4X is an excellent choice! Save this Page and Call for Availability. We Know You Will Enjoy Your Test Drive Towards Ownership! Drive a Little, Save a Lot. Really Experience the Murray Difference.