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| Denali Ultimate Package | Denali Black Diamond Edition | GMC MultiPro Tailgate | ProGrade Trailering System | 15 Diagonal Head-Up Display | Power Retractable Assist Steps | The 2021 GMC Sierra 3500 Denali 4WD Crew Cab, finished in Ebony Twilight Metallic with a Jet Black leather interior, represents the pinnacle of heavy-duty luxury and capability. This powerhouse is driven by the legendary Duramax® 6.6L V8 Turbo Diesel engine paired with the Allison® 10-speed automatic transmission, delivering massive torque for the most demanding hauls. Engineered for maximum utility, this build includes the Gooseneck/5th Wheel Prep Package, dual alternators, and a high idle switch. This exclusive Denali Black Diamond Edition stands out with 20 high gloss black aluminum wheels, power retractable assist steps with perimeter lighting, and specialized floor liners with removable carpet inserts. The Denali Ultimate Package further elevates the experience with a power sunroof, Rear Camera Mirror, and a multi-color Head-Up Display. Inside, passengers enjoy a premium atmosphere featuring ventilated front bucket seats, heated front and rear outer seats, and a Bose® Premium Sound System. Trailering is made effortless through the ProGrade Trailering System, integrated trailer brake controller, and an auxiliary trailer camera. Safety is paramount, with the Driver Alert Package I & II providing Automatic Emergency Braking, Lane Change Alert with Side Blind Zone Alert, and Forward Collision Alert. Complete with the versatile GMC MultiPro Tailgate, a factory spray-on bedliner, and Digital Variable Steering Assist, this Sierra Denali is built to dominate the road with unmatched refinement. Stock # B4400A AMVIC LICENSED DEALER

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