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The GMC Sierra HD brings massive power and heavy-duty capability to drivers who need uncompromising towing and hauling strength. Built on a robust, fully boxed frame, this heavy-duty pickup combines commercial-grade durability with a refined interior design. Whether you choose the 2500HD or the 3500HD, the Sierra HD delivers the muscle required for demanding work sites, commercial jobs, or pulling large recreational trailers across long distances.
Performance comes standard with a 6.6-liter V8 gas engine generating 401 horsepower and 464 pound-feet of torque, paired with an Allison 10-speed automatic transmission. For maximum pulling power, the available Duramax 6.6-liter Turbo-Diesel V8 delivers 470 horsepower and 975 pound-feet of torque, enabling gooseneck towing ratings up to 36,000 pounds on properly equipped 3500HD models. Modern trailering technology and upscale cabin appointments ensure confidence and ease behind the wheel.
For drivers in Oceanside, the GMC Sierra HD provides the ideal platform for towing heavy fifth-wheel trailers or commercial equipment down coastal routes. Contractors and business owners operating out of San Marcos benefit from its exceptional payload capacity and heavy-duty cargo bed volume for daily job site logistics. Work crews traveling across Escondido appreciate the spacious cab options, advanced driver-assist features, and smooth highway composure when moving heavy loads between work locations.
At Premier Buick GMC of Carlsbad, we are dedicated to helping business owners and truck enthusiasts find the exact heavy-duty setup they need. Business buyers can take advantage of tax incentives detailed on our dedicated Section 179 page, while every retail buyer benefits from our group-level Premier Advantage Rewards program. You can check your purchasing power using our online payment calculator and apply for financing before coming into the dealership. Our factory-trained team in the service center and on-site collision body shop is here to support your truck for every mile ahead. Start your search by checking out our current new vehicle specials and utilizing our online trade valuation tool.
When properly equipped with the Duramax Turbo-Diesel engine in a 3500HD dual-rear-wheel configuration, the Sierra HD offers a maximum gooseneck towing capacity of up to 36,000 pounds.
The Sierra HD comes standard with a 6.6-liter V8 gas engine and offers an available Duramax 6.6-liter Turbo-Diesel V8, both mated to an Allison 10-speed automatic transmission.
The MultiPro Tailgate is a six-function tailgate that offers multiple position settings for easier bed access, load stops, a step, and a flat work surface.
Yes, the ProGrade Trailering System offers up to 14 available camera views, including a Transparent Trailer View that lets drivers see through an attached trailer.
While both trucks share powertrains and cabin options, the 3500HD offers higher overall payload ratings, higher gross vehicle weight ratings, and an available dual-rear-wheel layout for maximum towing stability.