2026 GMC Sierra 2500 HD

The Sierra 2500 HD lineup begins with the Pro, a durable work truck that is powered by the standard 6.6L V8 gas engine and equipped with integrated trailering technology for demanding jobs. SLE introduces a more modern cabin with a 13.4-inch infotainment touchscreen, a 12.3-inch Driver Information Center, and expanded camera views that simplify towing and maneuvering. SLT elevates comfort with heated front seats, a heated steering wheel, leather-appointed seating, and the ProGrade© Trailering System, creating a more refined environment for daily work and long-distance travel. AT4 is engineered for off-road capability with Rancho© monotube shocks, skid plates, all-terrain tires, and a suspension tuned for challenging terrain. AT4X pushes even further with Multimatic© DSSV dampers, 35-inch mud-terrain tires, front and rear electronic locking differentials, and available 16-way power front seats with massage. Denali blends heavy-duty capability with premium craftsmanship through Forge perforated leather seating, authentic wood trim, and advanced driver-assistance technologies. At the top of the range, Denali Ultimate comes standard with the Duramax© 6.6L Turbo-Diesel V8, Alpine Umber full-grain leather, massaging front seats, and a Bose© Premium Audio System.

The standard 6.6L V8 gas engine produces 401 hp and 464 lbs-ft of torque, and it pairs with an Allison© 10-speed automatic transmission for smooth, confident power delivery. The available Duramax© 6.6L Turbo-Diesel V8 generates 470 hp and an impressive 975 lbs-ft of torque, delivering exceptional pulling power. When properly equipped, the Sierra 2500 HD can tow up to 22,390 lbs.

Built around a high-strength frame and advanced suspension, the Sierra 2500 HD remains composed under demanding loads. The available ProGrade© Trailering System offers up to 14 camera views, including Transparent Trailer View, while available Adaptive Cruise Control with trailering adjusts for changing loads. Off-road trims further expand capability with specialized suspension components, skid plates, and advanced four-wheel-drive systems.

Crew Cab models provide excellent front headroom and legroom, along with practical storage solutions that include a large center console and under-seat compartments. Higher trims introduce leather-appointed seating, genuine wood trim, heated and ventilated front seats, and premium craftsmanship throughout the cabin. Denali Ultimate raises the standard further with full-grain leather upholstery and available 16-way power front seats with massage.

A standard 13.4-inch infotainment touchscreen and 12.3-inch Driver Information Center form the heart of the digital cockpit. Wireless Apple CarPlay©, wireless Android Auto©, Google© built-in compatibility, and available Bose© premium audio keep every drive connected. Available Head-Up Display and integrated trailering technologies place essential information directly within the driver's view.

Every 2026 Sierra 2500 HD includes GMC Pro Safety with Automatic Emergency Braking, Forward Collision Alert, Front Pedestrian Braking, Lane Departure Warning, Following Distance Indicator, and IntelliBeam©. Available HD Surround Vision, Rear Camera Mirror, Adaptive Cruise Control with trailering, Blind Zone Steering Assist, and additional towing-focused safety technologies provide greater confidence while hauling heavy loads throughout California. Be sure to stop by Alfred Matthews GMC in Modesto, CA, so you can experience these safety features firsthand and take a test drive.