The 2026 GMC Sierra 3500HD starts at $47,900 on the Pro trim, pairs a standard 6.6L V8 with an available 6.6L Duramax Turbo-Diesel V8, and tops out at 36,000 lbs of gooseneck trailering on a properly equipped dual-rear-wheel build with the available Max Trailering Package. Six trims, from the work-focused Pro to the diesel-standard Denali Ultimate, cover everything from a fleet flatbed to a family truck that tows a horse trailer to Arkadelphia and back. For Hot Springs, Bryant and Hope drivers hauling equipment, campers or livestock along Interstate 30 and Highway 70, that towing ceiling and the DRW option are the two facts that decide the shopping list before anything else does.

Allen Tillery Buick GMC has sold GMC trucks in Hot Springs since 1967, and the Sierra 3500HD lineup below reflects current GMC pricing and specifications for the 2026 model year. Every figure on this page traces to GMC's own published data or a live inventory read, never an estimate.

2026 Sierra 3500HD Engines and Powertrain Options

The Sierra 3500HD is available with two engines, both paired with an Allison-built 10-speed automatic transmission.

6.6L V8 Gas Engine

Standard on Pro through Denali, GMC's 6.6L V8 (L8T) makes 401 horsepower and 464 lb-ft of torque. It is the engine most Sierra 3500HD work trucks and family haulers order, and it is the only engine available on trims below Denali Ultimate.

6.6L Duramax Turbo-Diesel V8

Available on Pro through Denali and standard on Denali Ultimate, the Duramax makes 470 horsepower and 975 lb-ft of torque. The Duramax is the engine behind the Sierra 3500HD's headline towing numbers, including its 36,000-lb gooseneck maximum, and it is the engine most buyers shopping for maximum trailering capacity choose.

Sierra 3500HD Trim Lineup and Pricing

Six trims span the 2026 Sierra 3500HD lineup, each available in multiple cab, bed and dual-rear-wheel configurations. Starting prices below are for each trim's lowest available configuration, MSRP excludes destination freight charge, tax, title, license, dealer fees, and optional equipment, and the dealer sets the final price.

Pro: Starting at $47,900

The Pro is the work-truck trim: Regular Cab, Double Cab or Crew Cab, single or dual rear wheels, 2WD or 4WD. It is the only trim offered in a 2WD Regular Cab, which makes it the natural choice for a flatbed or dump-body upfit.

SLE: Starting at $54,700

SLE ships 4WD-only and adds the equipment most fleet and family buyers expect over Pro, while still offering the full range of cab and DRW choices.

SLT: Starting at $65,900

SLT is Crew Cab-only and steps up the interior and technology, still with a dual-rear-wheel option for buyers who need SLT-level comfort with maximum stability under a heavy gooseneck.

AT4: Starting at $72,800

AT4 is Crew Cab, 4WD-only, and single-rear-wheel. GMC does not offer a dual-rear-wheel AT4 on the 3500HD. It adds an exclusive Jet Black interior with Kalahari accents, heated and ventilated leather front seats, an Off-Road Suspension Package with twin-tube Rancho shocks and skid plates, up to 14 available camera views with HD Surround Vision, and an available 15-inch Head-Up Display with an off-road inclinometer.

Denali: Starting at $76,100

Denali adds 20-inch Ultra-Bright machined aluminum wheels, authentic wood and patterned aluminum trim, Forge perforated leather seating with 12-way heated and ventilated power front seats, and offers a dual-rear-wheel build for buyers who want Denali-level trim on a maximum-payload truck.

Denali Ultimate: Starting at $97,200

Denali Ultimate is the range-topping trim and the only one with the Duramax Turbo-Diesel standard rather than available. It adds a signature Vader Chrome grille, 20-inch Ultra-Bright wheels with gloss-black inserts, an exclusive Alpine Umber full-grain leather interior with authentic Paldao wood, 16-way power front seats with massage, a 12-speaker Bose Premium Series audio system with Centerpoint surround sound, illuminated power-assist steps, and the MultiPro Tailgate Audio System by KICKER.

Dual rear wheels are available on Pro, SLE, SLT, Denali and Denali Ultimate. AT4 is single-rear-wheel only on this model.

Technology and Connectivity

Every 2026 Sierra 3500HD comes standard with a 13.4-inch diagonal GMC Premium Infotainment System with Google built-in, giving drivers Google Maps, Google Assistant and access to compatible apps without a paired phone. The available MultiPro Tailgate combines six functions into one tailgate, and SLT and up add ProGrade Trailering technology built around the in-vehicle trailering app. AT4 and above add up to 14 camera views with HD Surround Vision, useful for both off-road placement and hitching a gooseneck or fifth-wheel without a spotter.

Interior and Comfort

Cab choice drives interior space on the Sierra 3500HD: Regular Cab, Double Cab and Crew Cab configurations are all available depending on trim, with Crew Cab required on SLT, AT4, Denali and Denali Ultimate. Every trim from SLE up steps up seating material and comfort features, and Denali and Denali Ultimate add heated and ventilated, massage-equipped front seats with premium leather and real wood trim not available lower in the lineup.

Towing and Payload Capability

Properly equipped, the 2026 Sierra 3500HD tows up to 36,000 lbs on a gooseneck hitch, GMC's maximum-available figure for this model, reached on a Regular Cab Long Bed 2WD dual-rear-wheel truck with the Duramax and the available Max Trailering Package. On a conventional ball hitch, the maximum is a properly equipped 20,000 lbs. Gross Combined Weight Rating tops out at 43,900 lbs on the same maximum-package configuration. A well-equipped AT4 Crew Cab 4WD Standard Bed carries a standard payload of 4,089 pounds; payload varies by cab, bed and DRW configuration, so the exact figure for a specific build is on that truck's own certification label. See the full towing and payload breakdown on the Sierra 3500HD Towing Capacity page.

Safety and Driver Assistance

The Sierra 3500HD carries GMC's standard suite of driver-assistance features, including forward collision alert, automatic emergency braking, and rear cross-traffic alert, with adaptive cruise control with trailering available on AT4 and up. An integrated trailer brake controller is standard, and a StabiliTrak electronic stability control system with trailer-sway control is standard across the lineup.

Which 2026 Sierra 3500HD Is Right for You?

• Hauling a gooseneck horse trailer or a large RV to the lake: a Duramax-equipped, dual-rear-wheel Pro or SLE with the Max Trailering Package gets closest to the 36,000-lb ceiling. See the new Sierra 3500HD inventory.
• A daily-driver work truck that still tows comfortably: SLE or SLT with the gas V8 covers most conventional towing without the diesel premium.
• Off-road-capable trailhead access for hunting or ranch work: AT4's Off-Road Suspension Package and skid plates are the only Sierra 3500HD built for that, though it caps out below the DRW trims on payload and maximum tow.
• A family truck that still needs real capability: Denali balances premium interior comfort with the DRW option for buyers who want both.
• Maximum comfort without compromise: Denali Ultimate ships with the diesel included rather than optional, plus every technology and interior feature GMC offers on this truck.

See the current Sierra 3500HD inventory at Allen Tillery for what is actually on the lot today, with real pricing on real trucks.

Why Buy the 2026 Sierra 3500HD at Allen Tillery in Hot Springs

Allen Tillery Buick GMC has been family-owned in Hot Springs since 1967, and the sales and service team here works with Sierra 3500HD owners across Arkadelphia, Hope, Bryant and the rest of central Arkansas every day, from fleet upfits to weekend towing rigs. The service department is factory-trained on both the L8T gas V8 and the Duramax Turbo-Diesel, which matters on a truck this specialized. Call (501) 881-4160 or stop by to see what is on the lot, get a real trade appraisal, or schedule a test drive.

2026 Sierra 3500HD Frequently Asked Questions

How much can the 2026 GMC Sierra 3500HD tow?

Properly equipped, up to 36,000 lbs on a gooseneck hitch and up to 20,000 lbs on a conventional hitch, both figures reached on a Duramax-equipped, dual-rear-wheel configuration with the Max Trailering Package. Exact ratings vary by cab, bed, drivetrain and DRW/SRW configuration.

What is the difference between single rear wheel and dual rear wheel?

Dual rear wheels (DRW) add a second wheel on each side of the rear axle, which raises payload and gooseneck/fifth-wheel towing capacity and improves stability under a heavy hitch load. DRW is available on Pro, SLE, SLT, Denali and Denali Ultimate; AT4 is single-rear-wheel only.

Does the Sierra 3500HD come with a diesel engine?

Yes. The 6.6L Duramax Turbo-Diesel V8 is available on Pro through Denali and standard on Denali Ultimate. Every other trim ships with the 6.6L gas V8 standard and the Duramax as an option.

What is the starting price of a 2026 GMC Sierra 3500HD?

The Pro trim starts at $47,900 before destination freight charge, tax, title, license, dealer fees and optional equipment. The dealer sets the final price.

What trims are available on the 2026 Sierra 3500HD?

Six: Pro, SLE, SLT, AT4, Denali and Denali Ultimate. Unlike the Sierra 2500HD, the 3500HD does not offer the AT4X off-road trim.

Can I get a Crew Cab Sierra 3500HD with dual rear wheels?

Yes, on SLE, SLT, Denali and Denali Ultimate. AT4 does not offer a DRW build, and Pro and SLE also offer DRW on Regular Cab and Double Cab configurations.

Where can I see current Sierra 3500HD inventory near Hot Springs?

Allen Tillery Buick GMC stocks new Sierra 3500HD trucks and serves shoppers from Hot Springs, Arkadelphia, Hope, Bryant and across central Arkansas. See the current Sierra 3500HD inventory or call (501) 881-4160.

Explore the Sierra 3500HD