2026 GMC Sierra 2500 HD & 3500 HD
Heavy-Duty Capability, Refined Performance
Summary: The 2026 GMC Sierra 2500 HD and 3500 HD are built for serious work. Choose between a 6.6L gas V8 or the Duramax diesel V8. Towing capacity reaches up to 22,500 pounds (2500 HD) and over 36,000 pounds (3500 HD). Trims include Pro, SLE, SLT, AT4, AT4X, Denali, and Denali Ultimate. Advanced tech includes up to 13.4-inch infotainment, 12.3-inch digital cluster, and a 15-camera viewing system. Located at Buick GMC of Brandywine in Brandywine, MD.
The 2026 GMC Sierra HD series raises the bar for heavy-duty trucks. With two powerful engine choices, a rugged frame, and class-leading technology, these trucks are ready for your toughest jobs. Whether you need a workhorse for the job site or a luxurious hauler for weekend adventures, the Sierra 2500 HD and 3500 HD deliver.
From the off-road-ready AT4 to the premium Denali Ultimate, there's a trim for every need. The available Duramax diesel produces 470 horsepower and 975 lb-ft of torque, making light work of heavy loads. And with the MultiPro tailgate and ProGrade Trailering System, you'll have the confidence to tow with ease.
Key Specifications & Towing Capacity
The 2026 GMC Sierra 2500 HD and 3500 HD offer impressive towing and payload numbers. But the right configuration matters. Here's a quick look at what these trucks can do.
| Model / Engine | Max Towing (Conventional) | Max Towing (5th Wheel) | Horsepower | Torque |
|---|---|---|---|---|
| 2500 HD Gas 6.6L V8 | 16,000 lbs | 18,500 lbs | 401 hp | 464 lb-ft |
| 2500 HD Duramax Diesel | 18,000+ lbs | 22,500 lbs | 470 hp | 975 lb-ft |
| 3500 HD Duramax Diesel | 20,000+ lbs | 36,000+ lbs | 470 hp | 975 lb-ft |
Why Choose the 2026 GMC Sierra HD?
These trucks are engineered for the long haul. The Duramax diesel delivers effortless torque for climbing grades and merging with heavy loads. The available 15-camera system gives you a 360-degree view, making parking and hitching a breeze. And with the MultiPro tailgate, you get six functions in one tailgate. Whether you're in Brandywine, MD, or towing across state lines, the Sierra HD is your partner in productivity.
Engine & Performance
6.6L Duramax Diesel
The heart of the Sierra HD is the available 6.6L Duramax turbodiesel V8. With 470 horsepower and a massive 975 lb-ft of torque, it's built to handle the heaviest loads. The 10-speed Allison transmission ensures smooth, confident shifts even under full load. This powertrain is the choice for maximum towing and hauling capability.
6.6L Gas V8
The standard 6.6L V8 gas engine produces 401 horsepower and 464 lb-ft of torque. It's a proven workhorse for those who prefer gasoline. Paired with the same 10-speed transmission, it provides robust performance for everyday towing and hauling. It's a great choice for a balance of capability and value.
Advanced Technology & Safety
Infotainment & Connectivity
- Choice of 7-inch, 8-inch, or 13.4-inch touchscreen
- 12.3-inch digital instrument cluster (select trims)
- Wireless Apple CarPlay / Android Auto
- Available Bose Premium Audio
- Google built-in compatibility
Driver Assistance & Trailering
- ProGrade Trailering System with up to 15 camera views
- Transparent Trailer View
- Adaptive Cruise Control
- Lane Keep Assist with Lane Departure Warning
- Automatic Emergency Braking
- Available Head-Up Display
Design & Trim Levels
Exterior Styling
The Sierra HD commands attention with its bold grille, distinctive LED lighting, and muscular proportions. Available colors like Volcanic Red Tint and Onyx Black let you personalize your truck. The AT4 trim adds a factory lift, skid plates, and aggressive styling for off-road capability.
Interior Comfort
Step inside and you'll find a cabin that blends work and luxury. Available leather-appointed seating, heated and ventilated front seats, and a heated steering wheel make long hauls more comfortable. The Denali Ultimate trim wraps you in premium materials and advanced technology.
Frequently Asked Questions
Find Your 2026 GMC Sierra HD at Buick GMC of Brandywine
Ready to put a Sierra HD to work? Our team is here to help you find the right configuration. From the Pro work truck to the luxurious Denali Ultimate, we have a Sierra HD for every job. We're conveniently located in Brandywine, MD, serving the surrounding areas.
Buick GMC of Brandywine
15113 Robert S. Crain Hwy, Brandywine, MD 20613
Sales: 301-238-4385 | Service: 301-238-4388 | Parts: 301-372-8900