Used 2025 GMC Sierra 3500HD Denali

The 2025 GMC Sierra 3500HD Denali blends luxury-grade refinement, heavy-duty capability, and advanced trailering technology into a pickup built for those who demand the very best. With its bold chrome styling, premium Denali appointments, and legendary Duramax® diesel power, this heavy-duty truck is engineered to conquer demanding workloads while surrounding occupants with first-class comfort and cutting-edge innovation. 

Performance & Capability 

• Engine: Duramax® 6.6L V8 Turbo-Diesel delivering exceptional horsepower, massive torque, and confident heavy-duty performance 

• Transmission: Allison® 10-Speed Automatic Transmission engineered for smooth shifting and optimized towing capability 

• Drivetrain: Autotrac® Two-Speed 4-Wheel Drive system providing dependable traction in all conditions 

• Off-Road Suspension Package enhancing ride control and capability on rough terrain 

• Automatic Locking Rear Differential improving traction on loose or challenging surfaces 

• 3.42 Rear Axle Ratio balancing towing performance with highway efficiency 

• Integrated Trailer Brake Controller for enhanced trailer control and confidence 

• Exhaust Brake assisting with downhill towing and reducing brake wear 

• Heavy-Duty Air Filtration System and Engine Oil Cooler designed for demanding workloads 

• Transmission Oil Cooler helping maintain performance under heavy loads 

• Hill Descent Control for greater confidence on steep grades 

• Trailering Package with Hitch Guidance, Hitch View, Trailer Camera Provisions, and In-Vehicle Trailering App 

• FlexRide Drive Mode System optimizing performance for towing, hauling, and varying road conditions 

Winter & Weather Comfort 

• Heated & Ventilated Front Seats providing year-round comfort regardless of temperature 

• Heated Rear Outboard Seats ensuring premium comfort for second-row passengers 

• Heated Steering Wheel for added warmth during cold-weather driving 

• Remote Vehicle Start System allowing the cabin to warm up or cool down before departure 

• Dual-Zone Automatic Climate Control providing personalized comfort for driver and passenger 

• Rain-Sensing Windshield Wipers automatically responding to changing weather conditions 

• Rear Window Defogger improving visibility during winter driving 

• Engine Block Heater enhancing cold-weather starting reliability 

• Winter Grille Cover helping maintain engine efficiency during extreme temperatures 

• Dealer-Installed All-Weather Floor Liners helping protect the interior from snow, mud, and debris 

Interior Comfort & Convenience 

• Premium Denali Interior with upscale materials, refined craftsmanship, and signature styling details 

• Front Bucket Seats with Power Driver and Passenger Adjustments plus Power Lumbar Support 

• Driver Memory System storing preferred seating and mirror positions 

• Power Sliding Rear Window adding ventilation and convenience 

• Rear Seat Storage Package providing secure and practical cargo organization 

• Wireless Charging Pad for effortless device charging without cables 

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

• Wireless Apple CarPlay® & Android Auto™ smartphone integration 

• 13.4" GMC Premium Infotainment Touchscreen with Google Built-In and Navigation capability 

• 12" Reconfigurable Digital Driver Information Centre offering customizable vehicle information 

• Bose® Premium Audio System delivering rich, immersive sound quality 

• Multi-Colour 15" Head-Up Display projecting critical information directly into the driver's line of sight 

• Rear Camera Mirror providing an expanded and unobstructed rearward view 

• Multiple USB Ports and 120-Volt Power Outlets throughout the cabin for added convenience 

• Universal Home Remote for compatible garage doors and home automation systems 

• Wi-Fi® Hotspot Capability helping keep passengers connected on every journey 

Safety & Driver Assistance 

• Sierra HD Pro Safety Suite providing advanced driver-assistance technologies 

• Forward Collision Alert helping monitor potential hazards ahead 

• Automatic Emergency Braking enhancing confidence in emergency situations 

• Front Pedestrian Braking adding protection in busy urban environments 

• Lane Departure Warning helping maintain proper lane positioning 

• Adaptive Cruise Control for more relaxed highway travel 

• Following Distance Indicator providing additional awareness in traffic 

• Driver Safety Alert Seat delivering intuitive safety notifications through seat vibrations 

• Rear Cross Traffic Alert helping detect approaching vehicles while reversing 

• Trailer Side Blind Zone Alert enhancing awareness while towing larger trailers 

• Front & Rear Park Assist simplifying parking and maneuvering 

• HD Surround Vision delivering a comprehensive 360-degree view around the truck 

• Bed View Camera and Trailer Camera Provisions improving visibility when loading cargo or towing 

• Teen Driver Mode and Buckle-to-Drive technology promoting safer driving habits 

Exterior Styling & Utility 

• 20" Machined Aluminum Wheels paired with All-Terrain Tires for a bold and capable stance 

• Exterior Colour: Sterling Metallic — sophisticated, modern, and perfectly suited to the Denali's premium character 

• Signature Denali Chrome Grille and Exterior Accents creating an unmistakable road presence 

• LED Headlamps, LED Fog Lamps, Roof Marker Lamps, and Cargo Bed Lighting for exceptional visibility 

• Chrome Assist Steps providing convenient cab access and premium styling 

• Chrome Recovery Hooks adding functionality and a distinctive heavy-duty appearance 

• GMC MultiPro Tailgate offering multiple configurations for loading, work, and cargo management 

• EZ Lift Power Lock & Release Tailgate enhancing convenience during everyday use 

• Spray-On Bedliner protecting the cargo box from scratches, dents, and wear 

• 120-Volt Bed-Mounted Power Outlet providing convenient power for tools, equipment, and recreation gear 

• Heated Power-Folding Trailering Mirrors with Auto-Dimming functionality for enhanced towing visibility 

• Rear Bumper CornerSteps making bed access quick and easy 

• Deep-Tinted Glass and premium exterior trim adding refinement and privacy 

Whether you're hauling heavy equipment, towing a large RV, or simply enjoying the commanding presence of a premium heavy-duty truck, the 2025 GMC Sierra 3500HD Denali delivers uncompromising capability, advanced technology, and luxurious comfort. It’s the ultimate combination of professional-grade strength and Denali sophistication, built to handle the toughest jobs while treating every drive like a first-class experience.