2026 GMC Sierra HD in Branford, CT
The 2026 GMC Sierra HD is at Blasius GMC in Branford, CT
36,000 lbs
Max Available Towing
975 lb-ft
Available Duramax Torque
Up to 14
Available Camera Views
Design
Heavy-Duty Presence Across Work, Luxury, And Off-Road Trims
GMC builds the Sierra HD lineup to cover a broad range of needs, from Pro and SLE work trucks to SLT, AT4, AT4X, Denali, and Denali Ultimate models. Official GMC pages highlight the bold front-end design, LED projector headlamps, available six-function MultiPro Tailgate, and premium interior upgrades on higher trims.
- Lineup spans work-ready, premium, and off-road-focused trims
- Available six-function MultiPro Tailgate
- LED projector headlamps and signature lighting on select trims
- AT4X adds factory-installed off-road hardware and 35-inch Goodyear Territory MT tires
Capability
Gas Or Duramax Power For Serious Towing And Payload
Official GMC Sierra HD information notes a standard 6.6L V8 gas engine with an Allison 10-speed automatic transmission, plus an available Duramax 6.6L Turbo-Diesel V8 producing 470 horsepower and 975 lb-ft of torque. GMC lists max available towing up to 36,000 pounds and max available payload up to 6,584 pounds when properly equipped.
- Standard 6.6L V8 gas engine with Allison 10-speed automatic transmission
- Available Duramax 6.6L Turbo-Diesel V8 with 470 hp and 975 lb-ft of torque
- Max available towing up to 36,000 lbs
- Max available payload up to 6,584 lbs
- Available advanced trailering-assistance technologies and available ProGrade Trailering System
Technology
Large Displays And Camera Tools Built Around Trailering
GMC highlights a 13.4-inch diagonal center touchscreen and 12.3-inch diagonal digital Driver Information Center on Sierra HD, along with up to 14 available camera views including available Transparent Trailer View. Upper trims also offer a multicolor 15-inch diagonal Head-Up Display and an array of trailering-assistance technologies.
- 13.4-inch diagonal center touchscreen
- 12.3-inch diagonal digital Driver Information Center
- Up to 14 available camera views
- Available Transparent Trailer View
- Available multicolor 15-inch diagonal Head-Up Display
Interior
Crew Cab Room With Premium Denali Ultimate Details
Official GMC materials call out best-in-class standard Crew Cab front head and leg room for Sierra HD, giving the truck family-sized comfort along with work-ready utility. At the top of the lineup, Denali Ultimate adds 16-way power front seats with massage, premium materials, and Bose audio, while AT4X brings an Obsidian Rush interior with full-grain leather seating.
- Best-in-class standard Crew Cab front head room and leg room
- Available 16-way power front seats with massage feature
- Available Bose premium audio on upper trims
- AT4X features an Obsidian Rush interior with full-grain leather seating
- Denali Ultimate delivers the most premium Sierra HD cabin in the lineup
Discover the 2026 GMC Sierra HD Today
The 2026 GMC Sierra HD is built for hard work, heavy towing, and premium truck comfort. Visit Blasius GMC at 490 E Main St, Branford, CT 06405, or call (203) 481-3401 to explore Sierra HD trims and availability.