2026 GMC Sierra 2500 HD SLT

The Sierra 2500 HD SLT delivers impressive power through its standard 6.6-liter V8 gas engine paired with an Allison 10-speed automatic transmission. For those who need even more muscle, an available Duramax 6.6-liter Turbo-Diesel V8 engine produces 470 horsepower and a remarkable 975 pound-feet of torque. The Sierra 2500 HD is capable of towing up to 22,390 pounds when properly equipped, making it one of the most capable heavy-duty trucks available. A standard Trailering Package, Trailering Mirrors, and Trailer Brake Controller round out the SLT's work-ready credentials.

Step inside the Sierra 2500 HD SLT and you'll find a cabin that blends function with genuine comfort. The SLT includes 10-way power-adjustable driver and front outboard passenger heated seats with lumbar support and available perforated leather appointments. A heated steering wheel adds a thoughtful touch during colder months. Higher trims in the Sierra HD lineup offer up to best-in-class 16-way power front seats with a massaging feature, and the Sierra HD earns best-in-class standard Crew Cab front head and leg room. The SLT interior provides a spacious, well-crafted space designed to make every trip feel first-class.

The 2026 Sierra 2500 HD SLT keeps you informed and connected through a 13.4-inch diagonal center touchscreen powered by GMC's Premium Infotainment System, complemented by a 12.3-inch diagonal digital Driver Information Center. The system features Google built-in compatibility, voice-activated technology, and seamless wireless Apple CarPlay and wireless Android Auto compatibility. The SLT also includes the ProGrade Trailering System with an In-Vehicle Trailering App, giving drivers detailed trailering data right at their fingertips. Available upgrades include up to 13 camera views, including a Transparent Trailer View, and a 15-inch diagonal multicolor Head-Up Display.

Every 2026 GMC Sierra 2500 HD comes equipped with Sierra HD Pro Safety, a suite of standard safety and driver assistance technologies designed to support confident driving and trailering. The SLT adds available Adaptive Cruise Control with trailering capability, helping maintain a safe following distance even when pulling heavy loads. Available HD Surround Vision and multiple camera views provide enhanced visibility around the truck and trailer. These features work together to give drivers throughout China Township, Michigan, greater awareness and peace of mind on the road.

The 2026 GMC Sierra 2500 HD is available in a well-rounded lineup of trims to match a variety of needs and preferences. The entry-level Pro starts at $47,000 and covers the essentials with the standard 6.6-liter V8 gas engine, wireless smartphone compatibility, and best-in-class HD cargo bed volume. The SLE adds a 13.4-inch diagonal touchscreen, machined aluminum wheels, and available camera technology. The SLT builds further with heated and power-adjustable seating, a heated steering wheel, and the ProGrade Trailering System. Off-road enthusiasts can opt for the AT4 or the more aggressive AT4X, which adds a factory-installed 1.5-inch suspension lift, Multimatic DSSV dampers, and 35-inch Goodyear Territory MT tires. At the top of the lineup, the Denali and Denali Ultimate trims deliver luxury-grade materials, available Bose Premium Series audio, illuminated power assist steps, and the exclusive Alpine Umber interior with full-grain leather seating.

The 2026 GMC Sierra 2500 HD SLT strikes a compelling balance between hard-working capability and everyday comfort. From its powerful engine options and impressive towing capacity to its thoughtfully equipped cabin and advanced technology features, it's a heavy-duty truck that truly delivers on every front. Visit us at LaFontaine Buick GMC St. Clair to explore the Sierra 2500 HD SLT and find the right configuration for you.