2026 GMC Sierra 2500 Denali: Heavy-Duty Luxury

The 2026 GMC Sierra 2500 Denali represents the ultimate expression of professional-grade capability and high-end refinement. As one of the most prestigious trims in the heavy-duty lineup, the Denali combines legendary towing power with a cabin crafted from premium materials and cutting-edge technology. Whether you are hauling heavy equipment to a job site or towing a luxury fifth-wheel across the country, the Sierra 2500 Denali delivers a commanding performance that sets it apart from every other truck on the road. For drivers who refuse to compromise between hard-working muscle and first-class comfort, the Denali trim provides a sophisticated experience that redefines the modern heavy-duty pickup.

Exterior Color Options

The 2026 GMC Sierra 2500 Denali is available in a sophisticated palette of exterior colors, including several new and exclusive tones designed to highlight its bold, chrome-accented design. 

Available Exterior Colors:

• Onyx Black
• Summit White
• Glacier White Tricoat 
• Sterling Metallic
• Titanium Rush Metallic
• Downpour Metallic

Interior Color Options

The Denali interior is defined by exclusive materials, including authentic open-pore wood decor and premium Forge perforated leather seating surfaces. 

Available Denali Interior Colors:

• Jet Black with Forge perforated leather
• Atmosphere/Brownstone with Forge perforated leather

2026 Sierra 2500 Denali Engine Specs

The Sierra 2500 Denali offers two formidable powerplants, both paired with the world-class Allison 10-speed automatic transmission for seamless power delivery under any load. While the standard gas engine provides robust performance, the available Duramax Turbo-Diesel is the engine of choice for maximum torque and towing efficiency.

• Standard Engine: 6.6L V8 Gas Engine
• Available Engine: 6.6L Duramax Turbo-Diesel V8
• Gas Horsepower/Torque: 401 hp / 464 lb-ft
• Diesel Horsepower/Torque: 470 hp / 975 lb-ft
• Transmission: Allison 10-speed automatic
• Drive Type: 4WD (Standard on Denali)

The Allison 10-speed transmission features smart logic that automatically adjusts to your driving conditions, whether you are utilizing the Diesel Exhaust Brake on steep grades or engaging Tow/Haul mode to reduce shift cycling during heavy hauls.

2026 Sierra 2500 Denali Towing Capacity

The Sierra 2500 Denali is built for serious work, providing the structural integrity and advanced braking systems needed to tow massive loads with absolute confidence.

• Maximum Conventional Towing: Up to 20,000 pounds
• Maximum Gooseneck/5th-Wheel Towing: Up to 22,500 pounds (when properly equipped)
• Maximum Payload: Up to 3,863 pounds

Standard features like the ProGrade Trailering System and the integrated trailer brake controller make hitching and hauling easier, while the high-strength fully boxed steel frame ensures stability even when the truck is at its maximum capacity.

2026 Sierra 2500 Denali Exterior Dimensions

The Denali trim commands a massive presence on the road, with a signature grille and chrome accents that emphasize its wide, powerful stance.

• Length: 250.8 inches (Crew Cab Standard Bed)
• Width: 81.8 inches
• Height: 79.8 inches
• Wheelbase: 159.0 inches
• Ground Clearance: 10.1 inches
• Turning Circle: 52.7 feet

Denali Exterior Styling

The Denali’s exterior design is instantly recognizable through its luxury-focused details that set it apart from work-oriented trims:

• Signature Denali chrome grille
• 20-inch Ultra Bright machined aluminum wheels with bright chrome inserts
• 6-inch chrome rectangular assist steps (Standard)
• Chrome vertical recovery hooks
• LED projector headlamps with animated lighting sequences
• GMC MultiPro Tailgate with six functional positions

2026 Sierra 2500 Denali Interior Dimensions

Inside the Crew Cab, the Sierra 2500 Denali provides a massive interior volume with ample room for five or six adult passengers to travel in luxury. 

Passenger Space

• Front Headroom: 43.0 inches
• Front Legroom: 44.5 inches
• Rear Headroom: 40.1 inches
• Rear Legroom: 43.4 inches

Cargo Space The heavy-duty bed is engineered to handle massive payloads with best-in-class cargo volume.

• Standard Bed Cargo Volume: 69.5 cubic feet
• Long Bed Cargo Volume: 83.5 cubic feet
• Cargo Tie-Downs: 12 fixed tie-downs rated at 500 lbs per corner

Sierra 2500 Denali Technology Features

The Denali showcases GMC’s most advanced connectivity and trailering technology, providing a high-tech command center for any job. 

Display Technology

• Infotainment Screen: 13.4-inch diagonal GMC Premium Infotainment System
• Digital Gauge Cluster: 12.3-inch diagonal Driver Information Center
• Available Head-Up Display: 15-inch diagonal multicolor display
• Bed View Camera: Standard on Denali for easier fifth-wheel hitching

Google Built-In The Sierra 2500 Denali features Google built-in, providing a seamless digital experience directly through the 13.4-inch screen:

• Google Maps for real-time navigation and traffic updates
• Google Assistant for voice-controlled calls and vehicle settings
• Google Play for downloading your favorite entertainment apps

2026 Sierra 2500 Denali Safety Features

Standard safety is a hallmark of the Denali trim, featuring the GMC Pro Safety suite designed to help you navigate job sites and busy highways with confidence. 

Standard Safety Technology

• Automatic Emergency Braking
• Lane Departure Warning
• Forward Collision Alert
• Following Distance Indicator
• IntelliBeam Automatic High Beams
• Front and Rear Park Assist
• Rear Cross Traffic Alert
• Trailer Side Blind Zone Alert

Find Your 2026 Sierra 2500 Denali at Cable Dahmer Buick GMC of Independence

Ready to elevate your heavy-duty experience with the pinnacle of luxury and performance? Cable Dahmer Buick GMC of Independence has the 2026 GMC Sierra 2500 Denali in stock and ready for you to explore. Our team can show you how the advanced trailer cameras and premium interior make this the ultimate truck for any challenge. Schedule your test drive today and discover why the Sierra 2500 Denali is the perfect choice for your next heavy-duty vehicle.

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