X
0/ Vehicles Selected
0/ Vehicles Selected
The 2026 GMC Sierra 3500HD lineup runs from Pro and SLE through SLT and AT4, then into Denali and Denali Ultimate at the top, with AT4X available for a more specialized off-road setup. The range offers regular cab, double cab, and crew cab configurations, along with standard or long bed lengths and single- or dual-rear-wheel setups, depending on trim and purpose. Pro keeps a straightforward look with basic wheels and trim, while SLE and SLT introduce more chrome detailing and upgraded wheel designs. AT4 adds a lifted stance, off-road tires, and darker exterior finishes, while Denali and Denali Ultimate move in a more premium direction with larger wheels, chrome accents, and more detailed lighting elements. AT4X stands out visually with a taller, more aggressive stance and hardware that reflects its off-road capability.
The GMC Sierra 3500HD offers two engines, starting with a 6.6-litre V-8 gas unit producing 401 horsepower and 464 lb.-ft. of torque, paired with a 10-speed automatic transmission, while the available 6.6-litre Duramax turbo-diesel V-8 increases output to 470 horsepower and 975 lb.-ft. of torque. The diesel is the defining option for this truck, delivering the torque needed for sustained heavy towing without strain. Properly configured dual-rear-wheel models can tow up to approximately 16,329 kilograms with a fifth-wheel or gooseneck setup, with conventional towing ratings around 9,072 kilograms. Payload capacity can reach up to 3,270 kilograms in dual-rear-wheel configurations, allowing the truck to carry substantial weight in the bed as well. Rear-wheel and four-wheel drive are available, and the drivetrain includes dedicated tow-and-haul modes and integrated trailer brake control to manage heavy loads more effectively.
The GMC Sierra 3500HD combines its heavy-duty capability with a cabin designed to support long hours behind the wheel and the demands of towing, with premium comfort. Higher trims feature a 13.4-inch infotainment touchscreen paired with a 12.3-inch digital driver display, creating a clear, easily readable layout for vehicle data and navigation. The system includes built-in Google functionality, wireless Apple CarPlay and Android Auto, and a full trailering interface that provides camera views, trailer profiles, and real-time monitoring of key systems. GMC’s ProGrade Trailering System adds multiple camera angles, including transparent trailer view, which helps when manoeuvring large loads. Seating comfort improves through the range, with available heated and ventilated seats, full leather upholstery, and even massage functions in Denali Ultimate. Storage is practical and well distributed, and the MultiPro tailgate adds additional functionality at the rear of the truck for loading and access.
Unless you don’t want or need something as big, powerful, and capable as the 2026 GMC Sierra 3500HD, it’s hard to think of what role this truck can’t fulfil. It has all the heavy-duty truck capability and flexibility you need in a stylishly premium package. Experience GMC Sierra 3500HD magnificence today by visiting Wheaton Buick GMC at 685 Notre Dame Drive, Kamloops, British Columbia V2C5N7 or call (236) 232-3564 to schedule a convenient appointment.
