Key Features of the 2026 GMC Sierra 2500 HD

Duramax 6.6L Turbo-Diesel V-8

For drivers who tow often or pull heavy equipment, the Duramax 6.6-liter turbo-diesel V-8 is a standout option. Rated at 470 horsepower and 975 lb-ft of torque, it anchors the Sierra HD’s reputation for confident towing, hill-climbing ability, and composed acceleration with a trailer attached. GMC pairs the Duramax with a 10-speed automatic transmission that keeps the engine in its torque sweet spot, helping the truck deliver smooth, predictable power on steep grades and during passing maneuvers. The powertrain’s tuning complements the Sierra HD’s robust frame and suspension, working together to maintain stability and control over uneven surfaces and in crosswinds. If your day-to-day includes frequent towing or hauling in challenging conditions, this diesel setup helps transform difficult tasks into repeatable routines.

15-View Camera System

The available 15-view camera system is a practical upgrade that adds clarity around your truck and trailer when it matters most. With multiple viewpoints designed for hitching, backing, and lane changes, the system helps you visualize blind spots, line up gooseneck and fifth-wheel couplers, and navigate tight job sites with a long trailer in tow. From a bed-view camera to a rear side-view perspective that adjusts with your turn signal, the system prioritizes confidence at low speeds and on the highway. When you combine this visibility with the Sierra HD’s solid braking feel and sure-footed chassis, maneuvering a substantial load becomes far less stressful. For both seasoned haulers and first-time tower owners, this camera suite delivers the type of assurance that supports safer, smarter decisions.

MultiPro Tailgate

GMC’s MultiPro tailgate brings six integrated functions to a single tailgate design, turning the Sierra HD’s bed into a more versatile workspace. Use it as a conventional tailgate for loading, fold the inner gate for easier access to the bed floor, or configure a full-width load stop to secure longer materials. The inner gate can also drop to form a standing-height work surface, ideal for setting tools, checking plans, or staging gear. Pair it with available bed lighting, movable tie-downs, and a 120-volt outlet to turn the truck into a mobile station for small repairs, measurements, or laptop work between stops. By broadening availability for 2026, GMC ensures more shoppers can equip this practical innovation on the configuration that fits them best.

13.4-Inch Touchscreen with Google Built-in

Technology and towing aren’t mutually exclusive in the Sierra HD—especially with the available 13.4-inch touchscreen featuring Google Built-in. This expansive display brings a clean, intuitive interface for maps, voice commands, and everyday apps, while wireless Apple CarPlay and Android Auto provide familiar media and messaging access without cable clutter. The available 12.3-inch digital gauge cluster presents key vehicle data and trailering metrics at a glance, supporting quick checks on temperature, trailer status, and trip details. By integrating smart navigation, connected voice assistance, and real-time truck information, the Sierra HD keeps you informed while your hands stay dedicated to steering and trailering.

Advanced Trailering and Driver Assistance

Standard automated emergency braking, lane-departure warning, and automatic high-beam headlights set a strong baseline for every Sierra HD, whether you’re commuting before sunrise or pulling a long load after dark. Available blind-spot monitoring and rear cross-traffic alert help you account for traffic that can disappear behind a tall trailer, while available adaptive cruise control eases long highway runs. Together, these systems complement the Sierra HD’s confident dynamics and powerful drivetrains, helping you maintain situational awareness when road and weather conditions change. The result is a heavy-duty truck that treats safety as a core capability—not a luxury add-on.