The 2025 GMC Sierra HD is the ultimate heavy-duty pickup truck, seamlessly blending power, luxury, and advanced technology. This is a heavy-duty truck for drivers in Sudbury, Lively, Chelmsford, Azilda, Val Caron, and Hanmer who refuse to compromise. Whether you need a reliable workhorse or a high-end vehicle for family wilderness adventures, the 2025 GMC Sierra HD rises to the challenge with its immense capability and refined luxury.
The 2025 GMC Sierra HD lineup includes seven trim levels that exude style and presence: the Pro, SLE, SLT, AT4, Denali, AT4X, and top-of-the-line Denali Ultimate. These trims offer something for everyone, from the durable and practical Pro for work-related tasks to the immensely luxurious Denali Ultimate, which brings high-end materials and cutting-edge technology into the heavy-duty truck segment. Available in 2500 HD and 3500 HD models, the Sierra HD also offers a vast range of potential configurations thanks to the flexibility of its Regular Cab, Extended Cab, and Crew Cab body styles. These trucks are designed to accommodate various workloads, applications, and preferences, making them perfect for a range of work and leisure activities for parties of up to six people.
Under the hood, the 2025 GMC Sierra HD boasts two powerful engine options. The standard 6.6-litre gas-powered V-8 engine delivers 401 horsepower and 464 lb.-ft. of torque, offering strong performance for day-to-day tasks and some impressively challenging towing needs. Like every Sierra HD, the gas engine comes mated to a 10-speed automatic transmission and standard four-wheel-drive. For drivers who need extreme towing and hauling capability, the optional 6.6-litre Duramax diesel V-8 engine is the powerhouse of the lineup. It generates a staggering 470 horsepower and 975 lb.-ft. of torque, providing the GMC Sierra HD with a maximum towing capacity of 16,329 kg. This engine is ideal for handling the most challenging jobs, making it perfect for towing trailers, heavy equipment, or recreational vehicles across Canada’s varied landscapes. The AT4X trim is specially equipped for off-road adventures, with its enhanced suspension and terrain-management systems allowing for seamless transitions between on-road comfort and off-road excitement. Whether navigating rough terrain or cruising on highways, the GMC Sierra HD is built to perform in any environment.
The 2025 GMC Sierra HD interior reflects a perfect blend of comfort, functionality, and cutting-edge technology. Even the relatively modest SLE trim is equipped with a 13.4-inch touchscreen infotainment system, with wireless Apple CarPlay and Android Auto integration, ensuring passengers stay connected and entertained on every journey. Moving up the trims, the SLT adds premium features like 10-way power-adjustable heated front seats, a heated steering wheel, and dual-zone automatic climate control. The Denali and Denali Ultimate models elevate the luxury aspect to new heights, offering amenities such as full-grain leather upholstery, a 15-inch head-up display, and a MultiPro audio system by Kicker. The Denali Ultimate also includes a rear camera mirror and advanced safety features, providing comfort and peace of mind. Every inch of the GMC Sierra HD’s interior is crafted to provide a premium experience, whether you’re driving around town or embarking on a long-distance haul.