Engineered to command demanding workloads, our diesel-powered 2026 GMC Sierra 3500HD Denali Crew Cab 4X4 in Onyx Black delivers confident strength, composed control, and capability worthy of its flagship status. Motivated by a TurboCharged 6.6 Liter DuraMax Diesel V8 delivering 470hp and 975lb-ft of torque to a 10 Speed Allison Automatic transmission. This Four Wheel Drive truck also masters the miles with an off-road suspension, Digital Variable Steering, and a dominating design. Exterior highlights include a power sunroof, power assist steps, LED lighting, 20-inch wheels, a spray-on bedliner, and a MultiPro tailgate with a built-in Kicker sound system.Our Denali cabin features heated and ventilated leather power front seats, heated rear seats, a heated leather-wrapped steering wheel, dual-zone automatic climate control, and a power sliding rear window. Technology is anchored by a 13.4-inch touchscreen and a 12.3-inch driver display, providing Google Built-In, wireless Apple CarPlay®/Android Auto®, WiFi compatibility, wireless charging, and a Bose Performance Series premium audio system.Intelligent GMC safety measures let you drive confidently, protected by adaptive cruise control, automatic braking, a head-up display, HD surround vision, a digital rearview mirror, trailer blind-spot monitoring, Pro Grade trailering equipment, and more. With all that, our Sierra 3500HD Denali won't complain when the big jobs call! Save this Page and Call for Availability. We Know You Will Enjoy Your Test Drive Towards Ownership!