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2026 GMC Sierra 2500 HD Crew Cab

AT4 Pickup 4D 6 1/2 ft
5,075 miles
Includes:$15,400 in factory upgrades
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Why You’ll Love This Sierra 2500

Slotted above the SLT and below the Denali in the Sierra HD lineup, the AT4 elevates everyday capability with a 13.4-inch premium GMC infotainment system, HD surround vision, hill descent control, and adaptive cruise control with trailering.

AT4 Premium Plus Package

Originally valued at $5,035, this comprehensive package adds a power sunroof, the Technology Package, a power sliding rear window with defogger and power-retractable black assist steps for convenience and comfort.

Duramax 6.6L Turbo-Diesel V8 engine

Originally valued at $9,990, this engine delivers substantial power and torque for demanding towing and hauling applications.

Gooseneck/5th Wheel Prep Package

Originally valued at $545, this package equips the truck with the necessary provisions for seamless gooseneck and 5th wheel trailer connections.

Hitch Package

Originally valued at $375, this package provides the essential components for conventional trailer towing, expanding the vehicle's utility.

Serious towing power

Unleashes 470 HP and 975 lb-ft through the Duramax 6.6L Turbo-Diesel V8 engine, Allison 10-speed automatic transmission and 4WD, enhanced by an exhaust brake for controlled descents.

Off-road suspension package

Provides enhanced capability over rugged terrain with twin-tube Rancho shocks, ensuring a smoother ride and improved control.

13.4-inch premium GMC infotainment system

Features a large diagonal display with Google built-in compatibility, wireless Apple CarPlay and wireless Android Auto for comprehensive connectivity and entertainment.

HD surround vision

Offers up to 14 camera views, providing comprehensive visibility around the vehicle for easier maneuvering in tight spaces or with a trailer.

Adventure-ready engineering

The AT4 trim delivers enhanced off-road capability and premium comfort, designed for challenging terrain and demanding work.

Premium interior comfort

Showcases a Jet Black interior with Kalahari accents, complemented by heated and ventilated perforated leather seating surfaces for year-round comfort.

Hill descent control

Manages vehicle speed on steep declines, allowing for controlled and confident navigation of challenging off-road conditions.

Adaptive cruise control with trailering

Maintains a set following distance from the vehicle ahead, even when towing, reducing driver fatigue on long journeys.

20-inch gloss-black aluminum wheels

Enhance the truck's rugged aesthetic with a distinctive and aggressive appearance.

Wireless Apple CarPlay

Integrates your iPhone wirelessly for navigation, music and messaging directly on the infotainment screen.

Wireless Android Auto

Connects your Android smartphone wirelessly, providing access to apps, maps and media without cables.

Sierra HD Pro Safety suite

Includes Forward Collision Alert, Lane Departure Warning, Automatic Emergency Braking, Front Pedestrian Braking and Following Distance Indicator for enhanced awareness.

20-inch high gloss black aluminum wheels

High gloss black aluminum wheels provide a distinctive appearance and sturdy foundation for the vehicle.

This content is AI-generated and some details may not be 100% accurate. Refer to the details throughout this page for specific vehicle info.

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