Rugged meets refined in the 2026 GMC Sierra HD. This heavy-duty pickup truck provides exceptional strength for towing and hauling while offering premium comfort amenities for the ride home. If you live around Granite City, Edwardsville, or Alton, you can discover more about this GMC truck at Quality Buick GMC.
The GMC Sierra HD features the popular MultiPro Tailgate to enhance productivity. This tailgate adjusts to fit a wide variety of needs, including loading more cargo when you already have a full load.
You can pull a heavy load with the GMC Sierra HD, towing a trailer loaded with equipment. When properly equipped, this truck has a max towing capacity of 36,000 pounds.
Get a complete picture of your surroundings as you drive the GMC Sierra HD. This truck comes with up to 14 camera views, including Transparent Trailer View to see what’s behind you when you’re pulling a loaded trailer.
Get the job done in the 2026 GMC Sierra HD with the Duramax 6.6L Turbo-Diesel V8 engine, which is paired with the ten-speed automatic transmission. This pairing provides up to 470 horsepower and 975 lb.-ft of torque. You also have an exhaust brake to give you more control when you’re towing a trailer. Towing is simpler with advanced technology, such as the ProGrade Trailering System, which makes hitching and towing simpler. Adaptive Cruise Control includes trailering to ensure you have plenty of room to maneuver and slow down with the extra braking distance needed.
Relax in the 2026 GMC Sierra HD after a hard day with 16-way power front seats that include a massage feature. Full-grain leather seats command attention with contrast stitching. Enjoy more room to stretch out with Best-in-Class Crew Cab front head and leg room. Heated front seats and a heated steering wheel take the chill out of the air while ventilated seats help you keep your cool in hot weather. Enjoy the view from the power sunroof as you listen to the Bose Premium Series with 12 speakers and Centerpoint surround sound. You can even enjoy the music as you’re lounging by the campfire or tailgating with the MultiPro Tailgate Audio System by KICKER.
Advanced safety systems for the 2026 GMC Sierra HD give you peace of mind and monitor the road to help you avoid accidents. Sierra HD Pro Safety includes multiple features to give you more confidence on the road, such as:
Get the information you need to help you through the day. The 12.3-inch diagonal color Driver Information Center provides information about how your truck performs. That information can be seen on the windshield with the 15-inch diagonal Multicolor Head-Up Display. You also get a 13.4-inch diagonal Premium GMC Infotainment System for your entertainment, climate settings, and more.
The previous model year is still available for sale at Quality Buick GMC. Discover all of the features of the 2025 GMC Sierra HD and you might find that the previous year is a better fit for you.
Explore The 2025 GMC Sierra HD
Find out more about the 2026 GMC Sierra HD when you visit Quality Buick GMC. Stop by the dealership today or contact us with any questions.
