Unbreakable Capability in Marion, IN
When the job demands absolute power, unbreakable capability, and professional-grade luxury, standard trucks simply will not cut it. At Greg Hubler Buick GMC, we are proud to supply the hard workers of Grant County with the 2026 GMC Sierra HD lineup. Encompassing both the fiercely capable 2500HD and the monumental 3500HD, the newest heavy-duty Sierra is engineered for those who refuse to compromise on strength or refinement.
Marion and the surrounding Indiana communities are built on agriculture, industry, and hard work. The Sierra HD is the ultimate tool for this environment. Picture pulling a massive multi-horse trailer down State Road 18 or hauling heavy farm machinery out to a rural Grant County property. The Sierra HD handles these extreme weights without breaking a sweat. When winter weather hits and I-69 becomes slick with ice, the advanced four-wheel-drive systems and massive footprint of the Sierra HD keep you securely planted. Whether you are transporting construction materials across town or taking your luxury fifth-wheel camper across the country, the 2026 GMC Sierra HD delivers commanding power and absolute comfort.
Under the hood, the 2026 GMC Sierra HD offers two massive, purpose-built V8 engines paired with the legendary Allison 10-speed automatic transmission.
Ownership Note: Heavy-duty engines require specific care. Whether you choose the gas or diesel powertrain, our service center at Greg Hubler Buick GMC can advise you on the proper synthetic oil interval to keep your truck pulling at maximum capacity for years to come.
| Engine Type | Horsepower | Torque | Standard/Available |
|---|---|---|---|
| 6.6L V8 Gas Engine | 401 hp | 464 lb-ft | Standard |
| 6.6L Duramax® Turbo-Diesel V8 | 470 hp | 975 lb-ft | Available |
The 2026 Sierra HD offers seven distinct trim levels, allowing you to configure your truck exactly how you need it.
The Sierra HD lineup is defined by its staggering limits.
Towing and Hauling: For heavy equipment, livestock, or luxury RVs, the 2026 GMC Sierra 2500HD achieves a maximum towing capacity of up to 22,500 lbs when properly equipped with the Duramax diesel and a gooseneck or fifth-wheel hitch. If you need absolute supremacy, the Sierra 3500HD reaches a staggering maximum towing capacity of up to 36,000 lbs when properly equipped with the Duramax diesel, Dual Rear Wheels (DRW), and a gooseneck hitch. Maximum payload capacity reaches up to 3,759 lbs for the 2500HD and up to 7,290 lbs for the 3500HD.
Off-Road Readiness: Heavy-duty does not mean pavement-only. The AT4 and AT4X trims bring extreme off-road capability to the HD segment. Featuring specialized suspensions, off-road tires, skid plates, and in the case of the AT4X, Multimatic DSSV dampers, these trucks can drag heavy loads through the deep mud and uneven trails of Indiana without hesitation.
The exterior of the 2026 Sierra HD is as functional as it is imposing. The massive front grille provides optimal airflow to the heavy-duty cooling systems. Standard side bed steps and a CornerStep rear bumper make accessing the cargo box easy, even with work boots on.
The available Six-Function MultiPro Tailgate is a game-changer for job sites, providing a built-in step, work surface, or load stop. Available power-extending trailering mirrors with wide-field views ensure you can always see exactly what is happening behind your rig.
Just because you are working hard does not mean you have to be uncomfortable. The Crew Cab configurations of the Sierra HD offer class-leading front head and legroom. The cabin is incredibly quiet, utilizing strategic sound-deadening materials to block out road and engine noise.
Upper trims transform the cabin into a luxury office, featuring premium leather, heated and ventilated seats, and expansive center console storage large enough to hold hanging file folders or a laptop.
The 2026 Sierra HD proves that heavy-duty trucks can be brilliantly smart. Key technology features include:
Protecting your cargo, your passengers, and yourself is paramount. Every 2026 GMC Sierra HD is equipped with advanced safety technologies. Standard and available features include:
If you are ready to upgrade your towing capacity and experience professional-grade power, our heavy-duty truck experts at Greg Hubler Buick GMC are here to help.
