2026 GMC Sierra 3500 HD in Denton, TX
2026 GMC Sierra 3500 HD at Tom Clark Buick GMC in Denton, TX
When the job demands serious strength, long-term reliability, and no-nonsense confidence, the 2026 GMC Sierra 3500 HD stands ready. Available now at Tom Clark Buick GMC in Denton, TX, this heavy-duty pickup is engineered for drivers who rely on their truck every single day. Whether you are hauling equipment, towing large trailers, or managing a demanding work schedule, the Sierra 3500 HD delivers the kind of capability that keeps businesses moving and weekends productive.
Built on a fully boxed frame and backed by proven powertrain options, the Sierra 3500 HD lineup includes six trims: Pro, SLE, SLT, AT4, Denali, and Denali Ultimate. Each trim builds on the same foundation of strength while adding layers of comfort, technology, and design that suit different types of drivers. From regular cab work configurations to upscale crew cab setups, this truck is engineered to meet a wide range of needs without compromise.
Trim Levels that Match How You Work and Drive
The 2026 GMC Sierra 3500 HD lineup offers six distinct trims, each tailored to a specific purpose.
Pro
Pro is built for straightforward work. It focuses on durability, easy maintenance, and dependable performance, making it ideal for fleets and job sites that value function above all else.
SLE
SLE adds more everyday convenience features while maintaining a strong work-first attitude. This trim works well for drivers who balance job duties with daily driving.
SLT
SLT introduces more comfort-focused upgrades, refined interior materials, and expanded exterior styling while keeping the same heavy-duty foundation.
AT4
AT4 is designed for drivers who leave pavement behind. It adds off-road-focused hardware, unique styling elements, and increased road capability for challenging terrain.
Denali
Denali brings premium materials, advanced features, and distinctive design to the heavy-duty segment. It is well-suited for drivers who want luxury without sacrificing towing and payload strength.
Denali Ultimate
Denali Ultimate sits at the top of the lineup, pairing maximum capability with exclusive interior finishes, advanced trailering tools, and signature GMC design details.
Interior Comfort and Cabin Measurements
Inside the 2026 GMC Sierra 3500 HD, the focus is on long-term comfort, smart layout, and usable space. Crew cab configurations offer generous room for both front and rear passengers, making the truck practical for crews or families.
Interior measurements include 39.88 inches of front headroom and 40.12 inches of rear headroom. Front legroom measures 44.53 inches, while rear legroom comes in at 43.40 inches. Shoulder room measures 66.02 inches in the front and 65.30 inches in the rear, providing occupants with ample space to remain comfortable on extended drives.
Interior comfort features vary by trim and packages. Avaialble features include:
- Supportive front seats designed for extended driving
- Available heated and ventilated front seats
- Available heated rear outboard seats
- Dual-zone automatic climate control on higher trims
- Rear air vents for second-row passengers
Materials range from durable cloth and vinyl on work-focused trims to perforated leather and full-grain leather on Denali and Denali Ultimate models. Storage solutions throughout the cabin help keep tools, devices, and personal items organized.
Exterior Design and Paint Options
The Sierra 3500 HD wears a bold, upright design that reflects its heavy-duty mission. Large wheel openings, a tall hood, and a wide stance give it a commanding presence on the road or at the job site.
Exterior paint colors available include:
- Summit White
- Sterling Metallic
- Coastal Dune
- Downpour Metallic
- Cardinal Red
Additional exterior color availability includes Onyx Black, depending on trim and configuration.
Exterior features and options include reinforced bumpers, available LED lighting, functional bed steps, and multiple wheel designs sized for heavy-duty use.
Powertrain Options and Heavy-Duty Performance
The 2026 GMC Sierra 3500 HD is offered with two proven engine options, each paired with a 10-speed automatic transmission.
The standard 6.6-liter V8 gas engine delivers 401 horsepower and 464 lb-ft of torque, providing dependable performance for everyday hauling and towing.
For maximum output, the available 6.6-liter Duramax turbo-diesel V8 delivers 470 horsepower and 975 lb-ft of torque. This diesel powertrain is built for sustained heavy loads, long-distance towing, and demanding duty cycles.
Drivetrain options include rear-wheel drive and four-wheel drive, allowing drivers to tailor the truck to road conditions, terrain, and work requirements. Suspension tuning and available off-road suspension components support stability, control, and confidence under load.
Towing, Payload, and Work Capability
The Sierra 3500 HD is engineered for serious work. When properly equipped, towing capability reaches up to 36,000 pounds, making it suitable for large trailers, equipment, and commercial applications.
Payload capacity can exceed 5,000 pounds, depending on configuration, allowing drivers to carry heavy loads in the cargo bed without hesitation.
Work-focused capability features include integrated trailer brake control, available gooseneck and fifth-wheel prep packages, heavy-duty cooling systems, and reinforced hitch hardware. These systems work together to support confident towing and hauling in demanding conditions.
Technology Features that Support the Drive
Technology features are grouped here for clarity and ease of reference.
Available technology features include:
- 13.4-inch diagonal GMC Premium Infotainment System
- 12.3-inch diagonal digital driver information center
- Available head-up display measuring 15 inches diagonally
- Google built-in compatibility
- Wireless Apple CarPlay® and Android Auto™
- Available HD Surround Vision camera views
- In-vehicle trailering app
These systems provide clear vehicle data, navigation, and trailering support while keeping the driver informed and focused.
Safety and Driver Assistance Features
The 2026 GMC Sierra 3500 HD includes a wide range of driver assistance systems designed to support awareness and confidence on the road.
Standard and available safety features include:
- Forward Collision Alert
- Automatic Emergency Braking
- Front Pedestrian Braking
- Lane Departure Warning
- Following Distance Indicator
- Rear Cross Traffic Alert
- Trailer Side Blind Zone Alert
These features are designed to assist the driver during daily driving and towing situations, especially in busy work zones or on long highway stretches.
Find the 2026 Sierra 3500 HD at Tom Clark Buick GMC in Denton
For drivers searching for other vehicles in the heavy-duty segment, the 2026 GMC Sierra 3500 HD stands out for its balance of strength, refinement, and versatility. At Tom Clark Buick GMC in Denton, TX, shoppers can explore trim options, review vehicle availability, and get detailed guidance from a dealer that understands heavy-duty trucks.
Whether you need a straightforward work truck, an off-road-ready AT4, or a fully equipped Denali Ultimate, the Sierra 3500 HD lineup offers a configuration built to handle real-world demands with confidence.
*Disclaimer: This content was drafted with AI assistance for initial drafting, reviewed by a subject-matter expert for accuracy, and edited by our team of writers and editors.