Used 2025 GMC Sierra 3500HD Denali

The 2025 GMC Sierra 3500HD Denali represents the pinnacle of heavy-duty luxury and professional-grade capability. Purpose-built for extreme towing and hauling, yet refined with premium materials and advanced technology, this Denali delivers uncompromising strength with unmistakable sophistication — engineered for those who demand the best from their truck, on the job and beyond.  

Performance & Heavy-Duty Capability  

• Engine: 6.6L Duramax® V8 Turbo Diesel delivering exceptional torque, durability, and long-haul confidence  

• Transmission: Allison® 10-speed automatic transmission engineered for smooth power delivery and maximum towing control  

• Drivetrain: Autotrac® two-speed 4-Wheel Drive (4WD) for confident traction in demanding conditions  

• Rear Axle Ratio: 3.42 for optimized towing performance and efficiency  

• Exhaust Brake: Integrated engine exhaust brake for enhanced downhill control while towing  

• Suspension: Heavy-duty off-road suspension with skid plates and automatic locking rear differential  

• Trailering Excellence: Integrated trailer brake controller, hitch guidance with Hitch View, trailering app, and gooseneck/5th-wheel prep package  

• Drive Modes: FlexRide mode system adapts steering, throttle, and traction to road and load conditions  

Winter & All-Season Comfort  

• Heated & Ventilated Front Seats for year-round comfort  

• Heated Rear Outboard Seats and Heated Steering Wheel for cold-weather luxury  

• Remote Start System to pre-condition the cabin  

• Dual-Zone Automatic Climate Control with rear air vents  

• Engine Block Heater and Winter Grille Cover for reliable cold starts  

• All-Weather Floor Liners (Dealer Installed) to protect against the elements  

Interior Comfort & Advanced Technology  

• Denali-exclusive premium interior with refined materials and craftsmanship  

• Front Bucket Seats with power adjustment, lumbar support, and memory settings  

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

• Wireless Charging Pad and multiple USB & 120V power outlets  

• Keyless Open & Push-Button Start for effortless access  

• Wireless Apple CarPlay® & Android Auto™ integration  

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

• 12" Reconfigurable Digital Driver Information Display  

• 15" Multicolor Head-Up Display and Rear Camera Mirror  

• Bose® Premium Audio System for rich, immersive sound  

Safety & Driver Assistance  

• Sierra HD Pro Safety suite for enhanced confidence  

• Forward Collision Alert with Automatic Emergency Braking  

• Lane Departure Warning and Following Distance Indicator  

• Rear Cross Traffic Alert and Trailer Side Blind Zone Alert  

• HD Surround Vision and Bed View Camera for complete visibility  

• Front & Rear Park Assist and Adaptive Cruise Control  

• Teen Driver Mode and Buckle-to-Drive for added peace of mind  

Exterior Styling & Utility  

• 20" Machined Aluminum Wheels paired with All-Terrain Tires  

• Denali signature chrome accents, chrome assist steps, and chrome recovery hooks  

• Exterior Colour: Summit White — bold, timeless, and commanding  

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

• GMC MultiPro™ Tailgate with EZ Lift, power lock, and release functionality  

• Spray-On Bedliner and 120V Bed-Mounted Power Outlet for worksite-ready utility  

• Power Sunroof, deep-tinted glass, and perimeter lighting for added refinement  

Whether hauling massive loads, towing with confidence, or cruising in premium comfort, the 2025 GMC Sierra 3500HD Denali delivers unmatched diesel power, cutting-edge technology, and first-class luxury. It’s a heavy-duty truck without compromise — built for those who lead with strength, precision, and presence.