The 2025 GMC Sierra 1500 Denali Ultimate is the most luxurious full-size pickup truck available. The standard 6.2-liter V8 produces 420 horsepower and 460 lb-ft of torque through a 10-speed automatic transmission. The optional Duramax 3.0-liter turbo-diesel inline-six offers 305 horsepower and 495 lb-ft of torque for maximum towing efficiency. The Denali Ultimate trim features an Alpine Umber interior with full-grain leather, open-pore wood trim, and a 13.4-inch diagonal touchscreen with Google Built-in. The CarbonPro carbon-fiber composite bed is class-exclusive. The MultiPro tailgate with six functions enhances utility, while Super Cruise enables hands-free highway driving.
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