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6.6L Duramax Turbo-Diesel V8 engine delivering 470 horsepower and 975 lb-ft of torque
Allison 10-speed automatic transmission for smooth and efficient power delivery
Maximum towing capacity of up to 36,000 lbs when properly equipped
Integrated Trailer Brake Controller and ProGrade Trailering System for enhanced towing confidence
Adaptive Cruise Control with Trailering to maintain safe distances while towing
Durable suspension system designed to handle heavy loads with ease
Signature Denali Ultimate grille with exclusive Vader chrome finish
20-inch Ultra-Bright machined aluminum wheels with gloss-black inserts
LED projector headlamps with animated lighting sequences for a distinctive look
Six-function MultiPro Tailgate for versatile cargo management
Power-retractable assist steps with LED perimeter lighting for easy access
Spray-on bedliner with Denali logo for added durability and protection
Exclusive Alpine Umber interior featuring full-grain leather seating and authentic open-pore wood trim
16-way power front seats with massaging feature for ultimate comfort
Heated and ventilated front seats and heated rear outboard seats for climate-controlled comfort
Premium microsuede headliner and plaited contrast stitching for a refined cabin ambiance
Dual-zone automatic climate control to accommodate individual temperature preferences
Spacious Crew Cab configuration offering ample legroom and headroom for all passengers
13.4-inch diagonal center touchscreen with GMC Premium Infotainment System and available Google built-in compatibility
12.3-inch diagonal digital Driver Information Center providing customizable vehicle data displays
15-inch diagonal multicolor Head-Up Display projecting key information onto the windshield
Bose Premium sound system with Centerpoint surround sound for an immersive audio experience
Wireless Apple CarPlay and Android Autoâ„¢ compatibility for seamless smartphone integration
Wireless charging pad and multiple USB ports for convenient device charging
GMC Pro Safety Plus suite including:
Forward Collision Alert
Automatic Emergency Braking
Lane Departure Warning
Blind Zone Steering Assist
Rear Cross Traffic Braking
Front and Rear Park Assist
HD Surround Vision providing multiple camera views to assist with parking and trailering
Rear Camera Mirror offering a wider, less obstructed view behind the vehicle
Trailer Side Blind Zone Alert extending blind zone alerts to include the area around the trailer
Ample cargo bed volume with LED lighting for enhanced visibility
120-volt power outlet in the bed for convenient tool and device charging
Multiple tie-down points to secure cargo effectively
Gooseneck/fifth-wheel prep package for heavy-duty towing needs
The 2025 GMC Sierra 3500HD Denali Ultimate stands as the pinnacle of heavy-duty luxury trucks, offering unmatched power, sophisticated design, and state-of-the-art technology. Whether tackling demanding workloads or embarking on long journeys, this truck delivers an exceptional experience for drivers and passengers alike.