Blending rugged strength with refined execution, our diesel-driven 2026 GMC Sierra 3500 AT4 Crew Cab 4X4 brings Pro Grade capability together with premium comfort in Coastal Dune. Motivated by a TurboCharged 6.6 Litre DuraMax Diesel V8 offering 470hp and 975lb-ft of torque to a 10 Speed Allison Automatic transmission for getting to work where the pavement ends. This Four Wheel Drive truck also boasts an off-road suspension with hill-descent control and a 2-speed transfer to help handle difficult terrain with calm confidence. Our Sierra 3500 AT4 exterior includes LED lighting, protective skid plates, a MultiPro tailgate, 20-inch alloy wheels, power-folding trailering mirrors, and a receiver hitch with an integrated wiring harness. Our AT4 cabin features heated/ventilated leather power front seats, heated rear seats, a heated leather-wrapped steering wheel, dual-zone automatic climate control, and remote start. Technology is centered on a 13.4-inch touchscreen and a 12.3-inch driver display, providing Google Built-In, wireless Apple CarPlay®/Android Auto®, WiFi compatibility, Bluetooth®, and a Bose premium audio system. Staying safe is mandatory, so GMC ensures you're well-protected by HD surround vision, automatic braking, trailer-capable blind-spot monitoring, lane-departure warning, hitch view/guidance, hill-start assistance, trailer sway control, and more. A mighty workhorse, our Sierra 3500 AT4 is made to do better! 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.