2026
GMC SIERRA 3500HD DENALI 4X4 CREW CAB 8 FT. BOX SRW

The 2026 GMC Sierra 3500HD Denali commands attention with its unmistakable presence, signature chrome detailing, and uncompromising capability. Built for those who demand the highest levels of refinement, durability, and towing power, this heavy-duty pickup blends premium craftsmanship with cutting-edge technology and unstoppable diesel performance. 

Performance & Capability 

• Engine: 6.6L Duramax Turbo-Diesel V8 delivering immense torque, long-distance durability, and quiet, refined diesel power 

• Transmission: 10-speed automatic designed to optimize towing strength and smooth performance 

• Drivetrain: Autotrac 4WD system with a two-speed transfer case for confident control in all terrains 

• Axle Ratio: 3.42 rear axle for balanced torque delivery and hauling capability 

• Dual Rear Wheels: Enhanced stability and maximum towing confidence under heavy loads 

• Trailering Features: Integrated trailer brake controller, hitch guidance with Hitch View, trailer camera provisions, and a full in-vehicle trailering app 

• Cooling & Durability: Heavy-duty air filter, engine oil cooler, transmission oil cooler, and diesel exhaust brake for controlled downhill performance 

• Suspension: Standard HD suspension tuned for stability under load 

• Drive Modes: FlexRide mode system for tailored handling on road, off-road, or under heavy tow 

• Worksite Utility: Multiple 120V outlets including bed-mounted and in-cab locations, task lighting on mirrors, and LED cargo bed lighting 

• Gooseneck / 5th Wheel Prep: Factory-ready for maximum towing setups 

Winter & Weather Comfort 

• Heated & Ventilated Front Seats for year-round comfort 

• Heated Second-Row Outboard Seats to keep all passengers warm 

• Heated Steering Wheel for cold mornings 

• Remote Vehicle Start with integrated rear defogger 

• Dual-Zone Automatic Climate Control for consistent cabin comfort 

• Reinforced Heating & Defrost System designed for harsh climates 

• Engine Block Heater for reliable winter starts 

• Winter Grille Cover for optimized cold-weather performance 

Interior Comfort & Convenience 

• Front Bucket Seats with power adjustability and driver memory settings 

• Premium Jet Black Interior with color-keyed carpeting and carpeted mats 

• Power Sliding Rear Window and Rear Seat Storage Package for added practicality 

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

• 12" Digital Driver Display with customizable layouts 

• 15" Multicolor Head-Up Display for at-a-glance driving information 

• Bose Premium Audio System delivering rich, clear cabin sound 

• Wireless Charging, multiple USB ports, and 120V interior outlet 

• Keyless Open & Push-Button Start for seamless entry and ignition 

• Universal Home Remote for garage and gate integration 

• Illuminated Vanity Mirrors and thoughtful interior lighting for a refined cabin experience 

Safety & Driver Assistance 

• Sierra HD Pro Safety Suite for advanced protection 

• Forward Collision Alert, Automatic Emergency Braking, and Front Pedestrian Braking 

• Lane Departure Warning and Following Distance Indicator 

• Rear Cross Traffic Alert and Trailer Side Blind Zone Alert for greater trailering awareness 

• HD Surround Vision, Rear Camera Mirror, and Bed View Camera for complete visibility 

• Front & Rear Park Assist and Rear Pedestrian Alert 

• Adaptive Cruise Control for stress-free long-haul travel 

• Teen Driver Mode, Buckle-to-Drive, and rear seat belt indicators 

Exterior Styling & Utility 

• Exterior Color: Summit White — clean, crisp, and undeniably premium 

• Wheels & Tires: 18" polished forged aluminum wheels paired with LT-rated all-terrain tires 

• Lighting: LED headlamps, LED fog lamps, roof marker lamps, perimeter lighting, and task lighting 

• Chrome Accents: Chrome door handles, mirror caps, assist steps, and signature Denali grille 

• GMC MultiPro Tailgate for versatile loading, step access, or workstation configurations 

• EZ Lift Power Lock & Release Tailgate for effortless operation 

• Spray-On Bedliner for long-lasting bed protection 

• Rear Wheelhouse Liners (dealer installed) for added durability 

• Chrome Recovery Hooks for function and style 

• Sunroof for an open, spacious cabin atmosphere 

The 2026 GMC Sierra 3500HD Denali is the ultimate expression of heavy-duty sophistication. Whether conquering demanding worksites, towing with authority, or cruising in undeniable luxury, it delivers an unmatched blend of strength, innovation, and Denali-level refinement.