2026
GMC SIERRA 3500HD DENALI ULTIMATE 4X4 CREW CAB 6.75 FT. BOX SRW

The 2026 GMC Sierra 3500HD Denali Ultimate Crew Cab 4WD embodies the highest level of heavy-duty luxury and performance. Built to master the toughest jobs while surrounding you in first-class comfort, it combines advanced diesel power, precision craftsmanship, and next-generation technology. This is not just a truck — it’s the ultimate statement of capability and refinement. 

Performance & Capability 

• Engine: 6.6L Duramax® Turbo-Diesel V8 for exceptional torque and commanding towing strength 

• Transmission: Allison® 10-speed automatic — smooth, durable, and perfectly matched to heavy-duty demands 

• Drivetrain: Autotrac 4-Wheel Drive with a two-speed transfer case for confident traction in any condition 

• Axle Ratio: 3.42 rear axle balancing strength, control, and efficiency 

• Trailering Technology: Integrated trailer brake controller, Hitch Guidance with Hitch View, Trailer Camera Provisions, and advanced Trailering App 

• Exhaust Brake & Engine Oil Cooler enhance control and stability when towing large loads 

• Off-Road Readiness: Hill Descent Control, skid plates, and reinforced suspension for sure-footed capability 

• Gooseneck/5th Wheel Prep Package: Ready for the heaviest towing jobs 

Interior Luxury & Comfort 

• Interior Finish: Jet Black with Alpine Umber accents — hand-finished leather and authentic materials throughout 

• Front Seats: 16-way power-adjustable with massage, heating, ventilation, and power bolsters 

• Rear Seats: Heated outboard seating for premium passenger comfort 

• Technology: 

• 13.4" GMC Premium Infotainment System with Google Built-In 

• 12.3" customizable digital driver display 

• Head-Up Display projecting key info on the windshield 

• Audio: Bose® Premium Sound System for immersive clarity 

• Convenience: Power sunroof, wireless charging, multiple USB/120V outlets, and power-sliding rear window 

• Climate: Dual-zone automatic climate control with rear air vents and reinforced electric heater 

• Storage: Rear seat storage package and versatile center console 

• Remote Start & Keyless Open/Start for effortless daily use 

Safety & Driver Assistance 

• GMC Pro Safety & Pro Safety HD Packages with advanced driver-assistance features 

• Forward Collision Alert & Automatic Emergency Braking for proactive protection 

• Lane Departure Warning & Following Distance Indicator for confident highway driving 

• Adaptive Cruise Control with smooth automatic spacing 

• Rear Cross Traffic Alert & Trailer Side Blind Zone Alert for towing awareness 

• HD Surround Vision & Rear Camera Mirror for a complete 360° view 

• Safety Alert Seat & Teen Driver Mode add layered confidence and control 

Exterior Design & Utility 

• Exterior Colour: Glacier White Tricoat — refined and striking from every angle 

• Wheels: 20" machined aluminum with all-terrain tires for rugged elegance 

• Lighting: Signature LED headlamps, fog lamps, roof marker lamps, and cargo bed lighting 

• Denali Chrome Accents: Distinctive grille, mirror caps, handles, and recovery hooks 

• Power-Retractable Assist Steps with LED perimeter lighting for easy cabin access 

• GMC MultiPro Tailgate: Configurable for loading, step access, or a mobile workstation 

• Spray-On Bedliner & 120V Bed-Mounted Outlet for durability and on-site convenience 

• Skid Plates & Chrome Recovery Hooks for functional confidence and style 

Whether you’re towing, hauling, or simply cruising in luxury, the 2026 GMC Sierra 3500HD Denali Ultimate delivers unmatched power, advanced innovation, and master-level craftsmanship. It’s the pinnacle of heavy-duty excellence — a truck built to lead every road it drives.