2021 GMC Sierra 3500 Overview
2021 GMC Sierra 3500 Product Review/Description
The 2021 GMC Sierra 3500HD is one of the most capable trucks on the market. This heavy-duty workhorse is built for drivers who need enhanced hauling and towing capabilities. Not only does the new Sierra 3500HD pack a lot of muscle, but it also offers several luxurious amenities. Let’s take a closer look at this pickup truck’s key highlights.
What’s New for 2021?
Some exciting new trailer-assistance technologies arrive for 2021. When towing a load, Trailer Length Indicator and Jack Knife Alert take your sense of awareness to the next level. With the arrival of wireless Apple CarPlay and Android Auto, infotainment users no longer need to use a USB cord when linking their smartphone. Meanwhile, drivers who desire a special blend of style and luxury will love the all-new Diamond Edition model.
Superior Towing Power
When checking out the 2021 GMC Sierra 3500, you’ll have two formidable powertrains to choose from. A 6.6-liter, V8 gasoline engine comes standard. It packs a healthy 401 horsepower and 464 lb-ft of torque, which is enough muscle for most tasks. If you need to move a heavier load, step up to the Sierra 3500HD’s Duramax turbo-diesel engine. Output increases to 445 horsepower and a monstrous 910 lb-ft of torque. An exclusive Diesel After-Run feature helps ensure optimum durability. To handle this engine’s high torque, GMC mates it to a 10-speed Allison transmission.
Improved Driving Dynamics
Although the 2021 GMC Sierra 3500 is a full-size truck, it manages to inspire drivers with a great deal of confidence. Improved steering and braking give you superior control. An impressive ride quality makes the new Sierra 3500HD even more rewarding. Digital Variable Steering Assist is optional, which further enhances the truck’s low-speed maneuverability.
Capable Off-Road Machine
A robust 4X4 system with low-range gearing is available for the Sierra 3500HD. You’ll experience greater traction when traveling in the snow and mud. If you plan to tackle more challenging terrain, opt for the truck’s off-road package. It adds more rugged Twin-Tube Rancho shocks, underbody skid plates, and an Eaton automatic locking rear differential.
Bold Exterior
When behind the wheel of the 2021 GMC Sierra 3500HD, you’ll never have to worry about becoming lost in the crowd. This truck has a powerful road presence that cause onlookers to take notice. Several eye-catching treatments are available. Diesel-powered models feature a high-performance induction hood, which is designed to optimize horsepower. Advanced lighting is featured on the upper trim levels. If you desire an especially adventurous look, check out the Sierra 3500HD AT4. Its distinctive bold exterior features black chrome finishes and red tow hooks. Expect the upscale Denali trim to turn just as many heads. New for 2021 is the sleek Diamond Black Edition model. It features Ebony Twilight Metallic exterior paint and exclusive black aluminum wheels. While there’s no overlooking the GMC Sierra 3500HD’s attractive styling, it also comes ready to work hard. An available MultiPro Tailgate makes loading and unloading cargo even easier. This exclusive tailgate also transforms into an outdoor work surface. Every trim also receives a standard Corner-Step rear bumper.
Supreme Comfort
The new 2021 GMC Sierra 3500HD promises to treat you and your passengers to a comfortable ride. Crew cab models feature an especially roomy backseat. Even your tall buddies can stretch out. Amenities, such as heated/ventilated front seats and heated rear seats, allow you to enjoy an even more relaxing trip. Premium interior technology is also available for the new Sierra 3500HD. GMC’s high-resolution touchscreen with available wireless Apple CarPlay/Android Auto easily links to your smartphone. If you want to elevate your music-listening experience, upgrade to the truck’s seven-speaker Bose premium sound system. A few of the other upgrades include a head-up display, wireless charging, and a power sunroof.
Advanced Driving Aids
A long list of advanced driving aids are available for the 2021 GMC Sierra 3500HD. When a potential road hazard is detected, the pickup’s optional Safety Alert Seat will vibrate to get your attention. Other features include a 15-view camera system, lane departure warning, and Intellibeam headlights.

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