2026 GMC Sierra 3500HD

Power Locks - Power Adjustable Seat - Privacy Glass - Premium Audio - Satellite RadioThe 2026 GMC Sierra 3500HD AT4 is a brand new, heavy duty, off road ready crew cab pickup built for serious work and premium comfort. Finished in bold black with four full doors, it is ideal for drivers who need exceptional towing and hauling capability, but also appreciate a refined, well equipped truck for life around Barrie and beyond.Under the hood, a 6.6L turbocharged diesel V8 is paired with a smooth automatic transmission and a robust 4x4 system. This combination delivers confident power for towing, merging and long highway climbs, while diesel efficiency helps on extended trips. The advanced 4x4 drivetrain and AT4 off road focus give you reassuring traction on gravel roads, job sites and winter conditions, helping you stay in control when the weather turns.Inside, the Sierra 3500HD AT4 blends rugged durability with upscale comfort. Leather interior with supportive bucket seats and power seat adjustment make long days behind the wheel more relaxing. Memory seats keep your ideal driving position ready at the touch of a button. Dual zone climate control and air conditioning maintain a comfortable cabin in any season, while the heated steering wheel adds welcome warmth on cold mornings. The power sunroof in the Technology Package brings extra light and fresh air, creating an open, airy feel.Technology is thoughtfully integrated to keep you connected and entertained. A premium audio system with AM/FM stereo and satellite radio delivers clear, rich sound, while steering wheel audio controls keep your hands where they belong. The built in navigation system helps you find new job sites or weekend destinations with ease. Power windows, power locks and keyless entry simplify everyday use, and the rear defroster and rain sensing wipers maintain clear visibility with minimal effort.Safety and driver assistance features are extensive. Adaptive cruise control helps manage traffic flow on longer drives, while lane departure warning supports confident highway travel. Stability control and traction control work with the 4x4 system to enhance grip on wet or snowy roads. Reverse park assist with parking sensors, auto dimming mirrors and daytime running lights all contribute to easier manoeuvring and better visibility in tight urban spaces or dim conditions. Multiple airbags, including driver and passenger units, add important protection for everyone on board.Practical touches make this Sierra 3500HD AT4 ready for real work. The integrated tow package and bed liner prepare it for heavy trailers and cargo, while privacy glass helps keep the cabin cooler and more discreet. With its blend of diesel strength, advanced technology, upscale comfort and serious capability, this previously owned truck stands out as a powerful, premium choice in the heavy duty segment.Specifications6.6L turbocharged diesel V8 with automatic transmission for serious heavy duty performance4x4 drivetrain and AT4 off road focus for confident traction in tough conditionsLeather interior with power and memory seats plus heated steering wheel for premium comfortTechnology Package with power sunroof, navigation and premium audio for modern connectivityTow package and bed liner for ready to work hauling and trailering capability