New GMC Sierra 3500 HD for Sale in Waterloo, ON

Maximum capability, premium strength—the GMC Sierra 3500 HD is the ultimate heavy-duty truck for Canadians who need serious towing power, durability, and smart technology. Now available at Forbes Motors Chevrolet Buick GMC in Waterloo, Ontario, the Sierra 3500 HD is purpose-built for hauling the heaviest loads with total confidence and unmistakable GMC refinement.
 
Engineered for the toughest jobs, the Sierra 3500 HD offers two powerhouse options: a 6.6L V8 gas engine with 401 horsepower and 464 lb-ft of torque, or the available 6.6L Duramax® Turbo-Diesel V8 paired with an Allison® 10-speed automatic transmission, delivering 470 horsepower and 975 lb-ft of torque. When properly equipped, the Sierra 3500 HD can handle a maximum towing capacity of up to 36,000 lbs—ideal for gooseneck, fifth-wheel, and heavy equipment trailers.
 
The available dual rear wheel (DRW) configuration adds even more stability and payload capacity, making the Sierra 3500 HD a workhorse you can trust in every season and every job site across Ontario.
 
This truck isn’t just about raw power—it’s also built for comfort, connectivity, and command. Inside, the Sierra 3500 HD offers an available 13.4-inch centre touchscreen, 12.3-inch digital driver display, and premium features like leather-appointed seats, heated and ventilated front seats, Bose® audio, wireless Apple CarPlay® and Android Auto™, and Google built-in. The available head-up display and multi-color trailer length indicator keep your eyes on the road and your trailer in check.
 
With up to 14 available camera views, including Transparent Trailer View, Bed View, and Surround Vision, the Sierra 3500 HD gives you complete towing awareness. The MultiPro™ Tailgate, integrated trailer brake controller, and ProGrade™ Trailering System simplify hookup, handling, and hauling.
 
GMC Pro Safety features are available across trims, including Forward Collision Alert, Rear Cross Traffic Braking, Blind Zone Steering Assist, and Adaptive Cruise Control. Whether you're trailering through urban traffic or cruising the 401 with a full load, you’re backed by the latest in driver-assistance tech.
 
Available in Pro, SLE, SLT, AT4, and the fully loaded Denali and Denali Ultimate trims, the Sierra 3500 HD offers a range of options from rugged work-truck builds to luxury-grade heavy-duty trucks.
 
At Forbes Motors GM, we proudly serve heavy-duty truck buyers across the Waterloo Region and Southern Ontario with transparent pricing, business leasing support, and expert upfitting advice.
 
Shop the New GMC Sierra 3500 HD at Forbes Motors Chevrolet Buick GMC – Visit our showroom in Waterloo, ON or browse inventory online to find the heavy-duty pickup that’s ready to take on your toughest challenges.