2026 GMC Sierra 2500 HD in Denton, TX

2026 GMC Sierra 2500 HD for Sale at Tom Clark Buick GMC in Denton, TX

The Sierra 2500 HD balances brute force with refinement, offering a lineup that works just as hard as you do while still providing comfort, control, and modern capability.

For the 2026 model year, the Sierra 2500 HD is offered in seven trims: Pro, SLE, SLT, AT4, AT4X, Denali, and Denali Ultimate. Each trim builds on the same heavy-duty foundation while tailoring features, design, and capability to different needs. From regular cab jobsite duty trucks to fully equipped crew cab models with premium materials, the Sierra 2500 HD lineup gives buyers clear options without unnecessary complexity.

If you are searching for a new 2026 GMC Sierra 2500 HD, comparing other vehicles like the Chevrolet Silverado 2500HD, or looking for a truck that fits serious trailering and payload needs, this GMC stands out as a confident choice in the heavy-duty segment.

Trim Levels Designed for Real Work and Real Drivers

The Sierra 2500 HD lineup is broad by design, allowing buyers to select exactly the level of equipment and capability they need.

Pro

Pro is built for straightforward work. It focuses on durability, easy maintenance, and essential features that support daily jobsite use. This trim works especially well as a regular cab or double cab configuration for fleets and contractors.

SLE

SLE adds more convenience and comfort while keeping a work-first mindset. It is well-suited for drivers who use their truck for both professional duties and everyday driving.

SLT

SLT introduces upgraded interior materials, expanded exterior styling, and additional comfort features, making it a strong option for drivers who want refinement without sacrificing capability.

AT4

AT4 is engineered for drivers who regularly face rough terrain. It adds off-road-focused suspension tuning, unique styling elements, and equipment designed to support road capability beyond pavement.

AT4X

AT4X takes off-road confidence even further. With specialized suspension components and advanced hardware, it is built for drivers who demand maximum control in challenging environments.

Denali

Denali delivers a premium heavy-duty experience, combining upscale materials with advanced features while retaining the Sierra HD’s full towing and payload strength.

Denali Ultimate

Denali Ultimate sits at the top of the lineup, offering exclusive interior finishes, advanced trailering tools, and signature GMC design elements that set it apart from every other trim.

Interior Comfort and Cabin Measurements

Inside the 2026 GMC Sierra 2500 HD, comfort and usability take center stage. The interior is designed to support long workdays, extended road trips, and crew transportation without fatigue. Crew cab configurations provide generous space for both front and rear occupants, making the truck practical for work crews or families.

Interior dimensions highlight just how spacious the Sierra 2500 HD is. Front headroom measures 43.03 inches, while second-row headroom comes in at 40.12 inches. Front legroom measures 44.53 inches, and rear legroom 43.40 inches. Shoulder room reaches 66.02 inches in the front and 65.30 inches in the rear, giving passengers room to stay comfortable even on longer drives.

Interior comfort features vary by trim and available packages and include:

• Supportive front seats designed for long hours behind the wheel
• Available 10-way power driver seat with power lumbar support
• Available heated and ventilated front seats
• Available heated rear outboard seats
• Dual-zone automatic climate control on higher trims

Cabin materials range from durable vinyl and cloth on work-focused trims to perforated leather and full-grain leather on Denali and Denali Ultimate models. Smart storage solutions, including rear under-seat storage, center consoles, and door pockets, help keep tools, devices, and personal items organized.

Rear occupants benefit from rear air vents, generous legroom, and an available rear-seat reminder, which adds peace of mind during busy workdays.

Exterior Design and Available Paint Colors

The exterior of the Sierra 2500 HD is bold, upright, and unmistakably GMC. Its tall hood, wide stance, and strong body lines communicate capability at a glance, while functional details support everyday work and towing.

Available exterior paint colors 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 across the lineup include LED lighting, functional bed steps, multiple wheel designs, reinforced front and rear bumpers, and available vertical trailering mirrors that extend and fold to improve visibility when towing.

Powertrain Options and Heavy-Duty Performance

The 2026 GMC Sierra 2500 HD offers two proven engine options, each paired with a heavy-duty 10-speed automatic transmission designed to manage high torque and sustained workloads.

The standard 6.6-liter V8 gas engine produces 401 horsepower and 464 lb-ft of torque. This powertrain is well-suited for daily hauling, equipment transport, and jobsite use where reliability and predictable performance matter most.

For drivers who need maximum pulling power, the available Duramax 6.6-liter turbo-diesel V8 delivers 470 horsepower and an impressive 975 lb-ft of torque. This diesel V8 is engineered for demanding trailering, long-distance towing, and heavy payloads, making it a popular choice for duty trucks and commercial applications.

Drivetrain options include rear-wheel drive and four-wheel drive, allowing buyers to tailor the Sierra 2500 HD to terrain, weather, and job requirements. Suspension tuning and available off-road suspension components help maintain control and stability under load.

Towing, Payload, and Trailering Capability

The Sierra 2500 HD is designed from the ground up for serious work. When properly equipped, maximum towing capacity reaches up to 22,070 pounds, depending on configuration, powertrain, and tow package selection.

Payload capacity can exceed 4,000 pounds, allowing the cargo bed to handle heavy materials, tools, and equipment with confidence. The pickup bed measures 82.20 inches in length, with a cargo volume of 69.50 cubic feet, giving drivers plenty of space to get the job done.

Work-focused capability features include integrated trailer brake control, available gooseneck and fifth-wheel prep packages, and advanced trailering systems that support stability and driver awareness when hauling large loads.

Cargo Bed and Utility Features

The Sierra 2500 HD cargo bed is built for durability and flexibility. High-strength steel construction, multiple tie-down points, and available bed protection options help support demanding use.

Available cargo and utility features include:

• GMC MultiPro tailgate with multiple load and access configurations
• Cargo bed LED lighting
• Available spray-on bedliner
• Side bed step for easier access
• Available cargo bed area lamps

Rear wheelhouse liners, bed rail protection caps, and front box top rail protection are available to help preserve the truck’s appearance and functionality over time.

Technology Features that Keep You Connected

Technology features are grouped here for clarity and ease of reference. The 2026 Sierra 2500 HD integrates advanced systems designed to support trailering, navigation, and driver awareness without overwhelming the cabin.

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
• Wireless Apple CarPlay® and Android Auto™ compatibility
• Available Wi-Fi hotspot capability

Trailering-focused tech includes hitch view camera angles, bed view camera, trailer tire pressure and temperature monitoring, and an in-vehicle trailering app that provides vehicle details and towing information in real time.

Safety and Driver Assistance Features

Safety and driver assistance systems on the Sierra 2500 HD are designed to support awareness and confidence during daily driving and trailering tasks.

Standard and available safety features include:

• Automatic Emergency Braking
• Forward Collision Alert
• Front Pedestrian Braking
• Lane Departure Warning
• Following Distance Indicator
• Rear Cross Traffic Alert
• Trailer Side Blind Zone Alert
• HD Surround Vision

These features help drivers stay informed in busy work zones, on highways, and while maneuvering trailers in tight spaces.

Test Drive the 2026 Sierra 2500 HD in Denton, TX

For drivers comparing duty trucks, the 2026 GMC Sierra 2500 HD stands out with its balance of strength, refinement, and flexibility. At Tom Clark Buick GMC in Denton, TX, buyers can explore the full Sierra 2500 HD lineup, review trims and configurations, and get accurate vehicle details from a dealership that understands heavy-duty trucks.

Whether you need a straightforward Pro model, an off-road-ready AT4X, or a fully equipped Denali Ultimate, the Sierra 2500 HD delivers confidence on the road, at the job site, and everywhere in between. Tom Clark Buick GMC is ready to help you find the Sierra HD that fits your work, your terrain, and your daily demands.

*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.