2026 GMC Sierra 2500 HD & 3500 HD in Casper, WY

When the job calls for more towing, payload and durability than a light-duty pickup can provide, the 2026 GMC Sierra 2500 HD and Sierra 3500 HD are built to step up.

Around Provo and the Mountain West, heavy-duty capability can mean pulling a fifth-wheel camper, hauling equipment, carrying supplies for ranch or property work, towing a horse trailer, or covering long distances with a heavy load behind you. Sierra HD gives you the power, trailering technology and configurations to handle those demands with confidence.

Our team can help you find a truck that fits your commute, towing needs, work demands and weekend plans around Utah County and beyond.

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Serious Power for Serious Work

Every 2026 Sierra HD starts with a 6.6L V8 gas engine producing 401 horsepower and 464 lb.-ft. of torque, paired with an Allison 10-speed automatic transmission.

For drivers who need even more pulling power, the available 6.6L Duramax Turbo-Diesel V8 produces 470 horsepower and 975 lb.-ft. of torque, also paired with an Allison 10-speed automatic.

The Sierra 2500 HD can tow up to 22,390 pounds, while the Sierra 3500 HD reaches up to 36,000 pounds of available maximum towing when properly equipped. Both are available with gas or Duramax diesel power and a wide range of work, off-road and premium trims.

That gives Utah truck owners two proven heavy-duty powertrain choices for jobs ranging from equipment hauling and ranch work to long-distance towing across the state.

A Bed Built for Tools, Gear and Heavy-Duty Work

The Sierra HD bed is designed for real-world use.

GMC lists 69.5 cu. ft. of cargo volume with the standard bed and up to 83.5 cu. ft. with the long bed, depending on configuration.

An available six-function MultiPro Tailgate adds flexibility for loading, unloading, accessing the bed and carrying longer cargo.

That makes Sierra HD well suited for hauling tools, fencing supplies, camping equipment, feed, construction materials or anything else that needs to move across a jobsite, ranch or property in Utah.

Trailering Technology That Helps You Stay in Control

Sierra HD combines raw towing capability with technology designed to make hitching, maneuvering and towing easier.

An available ProGrade Trailering System brings integrated trailering tools into the truck, while Sierra HD can offer up to 14 available camera views, including available Transparent Trailer View on compatible setups.

Available Adaptive Cruise Control with Trailering can account for the additional drag and increased braking distances that come with towing a trailer.

For long drives on I-15, backing into a campsite or maneuvering equipment around a worksite, these systems can give drivers better visibility and more useful information when it matters most.

Off-Road Capability for Work and Recreation

For drivers who need heavy-duty capability beyond pavement, the Sierra HD AT4 and AT4X bring additional off-road hardware.

The Sierra HD AT4 includes an off-road suspension with twin-tube Rancho shocks, skid plates and Hill Descent Control.

The Sierra 2500 HD AT4X adds a factory-installed 1.5-inch suspension lift, Multimatic DSSV dampers, a rear electronic-locking differential, 35-inch Goodyear Territory MT tires and additional underbody protection. GMC lists 11.6 inches of ground clearance for the AT4X.

For remote worksites, rough access roads, hunting trips or mountain recreation, these configurations give Sierra HD owners more capability when the road gets rough.

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2026 GMC Sierra 2500 HD & 3500 HD FAQ

What is the difference between the 2026 GMC Sierra 2500 HD and 3500 HD?

The biggest difference is capability. The Sierra 2500 HD can tow up to 22,390 pounds and carry up to 4,049 pounds of available maximum payload. The Sierra 3500 HD can tow up to 36,000 pounds and carry up to 7,290 pounds when properly equipped.

How much can the 2026 GMC Sierra 2500 HD tow?

The 2026 Sierra 2500 HD offers up to 22,390 pounds of available maximum towing when properly equipped. Actual capacity varies by cab, drivetrain, engine, axle ratio, hitch type and equipment.

How much can the 2026 GMC Sierra 3500 HD tow?

The 2026 Sierra 3500 HD can tow up to 36,000 pounds when properly equipped. The highest ratings require specific configurations and trailering equipment.

What engines are available in the 2026 GMC Sierra HD?

The Sierra 2500 HD and 3500 HD come standard with a 6.6L gas V8 producing 401 horsepower and 464 lb.-ft. of torque. An available 6.6L Duramax Turbo-Diesel V8 produces 470 horsepower and 975 lb.-ft. of torque.

Is the Duramax diesel available in both the Sierra 2500 HD and 3500 HD?

Yes. The available 6.6L Duramax Turbo-Diesel is offered in both Sierra HD models and is paired with an Allison 10-speed automatic transmission.

How much payload can the 2026 GMC Sierra HD carry?

The Sierra 2500 HD offers up to 4,049 pounds of available maximum payload, while the Sierra 3500 HD can reach up to 7,290 pounds when properly configured. Actual payload varies by equipment and configuration.

What trailering technology is available on the 2026 Sierra HD?

Available Sierra HD trailering technology includes the ProGrade Trailering System, multiple available camera views and Adaptive Cruise Control with Trailering. Feature availability varies by trim and configuration.

Is the 2026 GMC Sierra HD good for Utah towing?

The Sierra HD lineup is well suited to demanding Utah towing, with powerful gas and diesel engines, substantial trailering capacity, available four-wheel drive and technology designed to support heavy loads on highways and mountain routes.

Where can I test-drive a 2026 GMC Sierra 2500 HD or 3500 HD in Provo, Utah?

You can test-drive a 2026 Sierra 2500 HD or 3500 HD at Provo GMC Cadillac. Our team can help you compare engines, cab styles, bed lengths, towing equipment and configurations based on your work and towing needs.

Vehicle features, specifications, towing ratings, payload ratings, cargo capacities and technology availability vary by model, trim, cab style, bed length, powertrain, drivetrain, axle ratio, package and optional equipment. Maximum towing and payload ratings require specific configurations and may be affected by passengers, cargo, accessories, hitch type and trailer setup. Camera, driver-assistance and trailering technologies have limitations and do not replace safe, attentive driving. Always consult the vehicle's trailering information, Owner's Manual and manufacturer guidance before towing, hauling or off-road use. Verify specifications and equipment on the individual vehicle before purchase.