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

The 2026 GMC Sierra 3500HD Denali stands at the top of the heavy-duty segment, blending uncompromising towing capability, bold design, and the unmistakable refinement of the Denali name. Finished in commanding Onyx Black with premium chrome accents, this Crew Cab Standard Box configuration delivers power, precision, and premium craftsmanship for those who expect the absolute best from their truck. 

Performance & Capability 

• Engine: 6.6L Duramax Turbo-Diesel V8 offering immense torque and long-haul dependability 

• Transmission: 10-speed automatic engineered for heavy-duty torque management and smooth shifts 

• Drivetrain: Autotrac 4WD with two-speed transfer case for responsive traction across terrain 

• Axle & Strength: 3.42 rear axle ratio and single-rear-wheel configuration for balanced power and stability 

• HD Performance Enhancements: 

• Exhaust brake for controlled downhill towing 

• Heavy-duty air filter and reinforced heating/defrost system 

• Transmission and engine oil coolers for demanding workloads 

• Off-Road Features: Off-Road Suspension Package, skid plates, and Hill Descent Control for rugged terrain confidence 

• Trailering & Worksite Readiness: 

• Integrated trailer brake controller 

• Hitch Guidance and Hitch View 

• Trailer Camera Provisions and Trailer Side Blind Zone Alert 

• Gooseneck/5th-wheel prep package 

• Bed-mounted 120V outlet and spray-on bedliner 

• Winter & Heavy-Use Upgrades: Engine block heater, winter grille cover, and reinforced climate systems 

Interior Comfort & Convenience 

• Premium Seating: 

• Front bucket seats with power driver and passenger adjust 

• 4-way lumbar support and driver memory settings 

• Heated and ventilated front seats 

• Heated second-row outboard seats 

• Climate & Cabin Serenity: Dual-zone automatic climate control, rear air vents, and deep-tint glass for better temperature control 

• Luxury Touches: Jet Black interior trim, auto-dimming rearview mirror, leather-wrapped steering wheel with audio controls 

• Utility & Storage: Rear seat storage package, color-keyed carpeting, console with integrated USB ports 

• Convenience Features: 

• Keyless open and push-button start 

• Remote vehicle start 

• Power sliding rear window 

• Universal Home Remote 

• 120V outlets on dash and in bed 

Technology & Connectivity 

• Infotainment: 13.4" GMC Premium Infotainment touchscreen with Google Built-In and wireless phone projection 

• Driver Information: 12" reconfigurable digital driver display 

• Sound System: Premium Bose audio system for immersive listening 

• Camera Systems: 

• HD Surround Vision 

• Bed View Camera 

• LED cargo bed lighting 

• Connectivity: OnStar services, Wi-Fi hotspot capability, multiple USB ports including second-row charge-only ports 

• Wireless Convenience: Wireless charging and full smartphone integration 

Safety & Driver Assistance 

• GMC Pro Safety & Pro Safety Plus Features: 

• Forward Collision Alert 

• Automatic Emergency Braking 

• Lane Departure Warning 

• Following Distance Indicator 

• Rear Cross Traffic Alert 

• Front & Rear Park Assist 

• Teen Driver & Buckle-to-Drive 

• Advanced Protection: 

• Front Pedestrian Braking 

• HD Surround Vision 

• Safety Alert Seat 

• Tire Pressure Monitoring System with additional indicators 

• Rear Seat Reminder 

Exterior Styling & Utility 

• Denali Signature Presence: Chrome door handles, mirror caps, assist steps, and striking grille design 

• Lighting: LED headlamps, fog lamps, cargo lights, roof marker lamps, and IntelliBeam automatic high beams 

• Wheels & Tires: 20" machined aluminum wheels paired with LT275/65R-20 all-terrain tires 

• Bed & Tailgate Capability: 

• GMC MultiPro Tailgate with EZ Lift 

• Power lock and release 

• Spray-on bedliner and cargo lighting 

• Work-Ready Details: Rear bumper CornerSteps, chrome recovery hooks, skid plates, and active aero shutters for better efficiency 

The 2026 GMC Sierra 3500HD Denali delivers unmatched power, premium craftsmanship, and cutting-edge technology. Built for towing, hauling, long-distance travel, and everyday confidence, it embodies the pinnacle of professional-grade engineering wrapped in unmistakable Denali luxury.