Used GMC Sierra 3500HDs for sale in Mono, ON

Step into a truck that doesn’t simply do the job, it dominates it. The 2021 Sierra 3500HD Denali crew cab 4x4 is built with professional-grade capability and premium refinement, tailored for those who demand both muscle and sophistication.

Under the hood, you’ll find the legendary 6.6 Duramax diesel, up to 445 HP and 910 lb-ft of torque. Paired with an advanced automatic transmission and rugged 4x4 drivetrain, this Denali is ready to tow heavy, haul strong, and conquer the toughest terrain. From its bold exterior to its elite interior, every detail reflects Denali prestige. The signature chrome-accented grille, large polished wheels, and led lighting make a bold statement.

Inside, you’re enveloped in premium leather seating, polished metal and wood-grain accents, heated/ventilated front seats, and the intuitive infotainment suite featuring a high-resolution touchscreen, apple CarPlay, Android Auto, and premium audio.

 Luxury meets practicality here: advanced towing technology, smart connectivity, roomy crew-cab comfort, and Denali-exclusive amenities mean this truck works hard and feels exceptional every time you climb in. Whether pulling your largest trailer or simply stepping out in style, you’ll feel the difference.

The 2021 Sierra 3500hd Denali is more than just heavy duty, it’s heavy luxury. Strong. Stylish. Unstoppable. Certified.

Bray Motors has been proudly serving the North since 1954! This vehicle is an example of the great quality CERTIFIED PREOWNED vehicles that we have ready for you to enjoy here at Bray Motors. If you are shopping for New or Used, our professional sales staff and expert service technicians will make your next vehicle purchase an enjoyable experience. We carry a wide selection of in-stock New, and Certified Pre-Owned GMC, Chevrolet and Buick models, so finding the right one for you will be a breeze! We have a comfortable and inviting customer lounge, with free wi-fi and an assortment of cold and hot drinks for your convenience. Call or visit us today!!!

DENALI DUALLY, DURAMAX 6.6L V8 TURBO DIESEL, ALLISON 10-SPD AUTOMATIC TRANSMISSION, 18-INCH ALLOYS, BOSE AUDIO, POWER SUNROOF, HEADS UP DISPLAY,  13.4-INCH INFOTAINMENT SYSTEM, SMART PHONE INTEGRATION, LEATHER SEATS, POWER ADJUSTABLE DRIVER AND FRONT PASSENGER SEAT, WIRELESS CHARGING, DUAL ZONE AUTOMATIC CLIMATE CONTROL, HEATED STEERING WHEEL,  POWER WINDOWS/ LOCKS/ MIRRORS, POWER SLIDING REAR WINDOW, HEARTED AND VENTILATED DRIVER AND FRONT PASSENGER SEATS, HEATED SECOND ROW, ADAPTIVE CRUISE CONTROL, BED VIEW CAMERA,  REAR CAMERA MIRROR, TRAILER SIDE BLIND ZONE ALERT, REAR CROSS TRAFFIC ALERT, HD SURROUND VISION, FRONT AND REAR PARK ASSIST, FORWARD COLLISION ALERT, LANE DEPARTURE WARNING, TRAILERING BRAKE CONTROLLER, TRAILERING PACKAGE WITH HITCH GUIDANCE AND HITCH VIEW, SPRAY-ON BED LINER, FRONT LED, FOGS, HEATED MIRROR, GMC MULTIPRO TAILGATE, GOOSENECK/5TH WHEEL PREP PACKAGE, 1-OWNER, CERTIFIED PREOWNED!

2025 GMC Sierra 3500HD Denali Dually, Built for serious capability with premium refinement, this Sierra 3500HD Denali Dually is powered by the legendary 6.6L Duramax V8 Turbo Diesel paired with the Allison 10-speed automatic transmission, delivering exceptional towing confidence and long-haul performance. The dually rear wheels and 18-inch alloy wheels underline its heavy-duty strength. Inside, the Denali cabin offers upscale comfort with leather seating, power-adjustable driver and front passenger seats, and heated and ventilated front seats, complemented by heated second-row seating and a heated steering wheel. Technology is front and center with the 13.4-inch infotainment system, Heads-Up Display, Bose premium audio, wireless charging, and seamless smartphone integration. Confidence and visibility are enhanced with HD Surround Vision, bed view camera, rear camera mirror, and front and rear park assist, making maneuvering and trailering easier than ever. Advanced safety features include adaptive cruise control, forward collision alert, lane departure warning, rear cross traffic alert, and trailer side blind zone alert. Designed to tow with ease, this Denali is equipped with the trailering package with hitch guidance and hitch view, integrated trailer brake controller, and gooseneck/5th wheel prep package. Additional highlights include a power sunroof, GMC MultiPro tailgate, spray-on bedliner, power sliding rear window, LED lighting with front fog lamps, and heated power mirrors. A one-owner, Certified Pre-Owned heavy-duty truck that blends uncompromising capability with Denali-level luxury, this Sierra 3500HD is ready for work or weekend towing in total comfort.