What's New for 2021?
Capable of towing 36,000 pounds, the 2021 Sierra 3500HD is one of America's leading heavy-duty pickup trucks. From the MultiPro Tailgate to the CornerStep Rear Bumper, this powerful model has lots of exclusive exterior accessories. The Transparent Trailer View is an all-new technology that provides best-in-class visual guidance for towing. Up to 15 different camera views are available for this full-size pickup truck.
Cabin options for the 2021 Sierra 3500HD include the Regular, Double and Crew. Up to six seats are available inside the full-size cabs. This heavy-duty pickup truck offers dual rear tires for the rear-wheel drive and 4x4 drive configurations. A long bed provides extra utility for hauling bulky payload. Some exterior paint options for this model include Cardinal Red, Pacific Blue and Brownstone Metallic.
The 2021 Sierra 3500HD offers the 6.6 L Duramax engine block that generates up to 445 horsepower. This turbocharged V8 powertrain unleashes 910 pound-feet at 1,600 RPM. An exhaust brake reduces stress on this signature diesel-burning propulsion system. Featuring the latest Allison label, an automatic transmission system with 10 gear combinations is paired with the Duramax powertrain.
This heavy-duty GMC pickup truck also offers a 6.6 L V8 engine that burns gasoline. Rated at 401 hp and 464 lb-ft of torque, the naturally aspirated powertrain creates a rear axle ratio of 3.73. A six-speed automatic gearbox is synchronized with the eight-cylinder gas engine, which utilizes direct injection in every combustion cycle.
Engineered to improve off-road handling, an automatic locking differential is installed on the Sierra 3500HD. This important hardware includes the patented Eaton Locker, which senses slight variations in the RPMs of the rear wheels. Conveniently located near the instrument panel, the Autotrac electronic system is linked to a two-speed transfer case. For example, the 4WD High Mode improves traction on snowy roads and other types of slippery surfaces.
Designed for heavy-duty operations, dual batteries deliver up to 1,460 cold-cranking amps under the hood of this GMC model. Featuring a maintenance-free configuration, the batteries generate up to 70 amp-hours of peak output. An engine block heater and a high-capacity air filter are some other optional features for this powerful pickup truck.
The 2021 Sierra 3500HD can be upgraded with lots of other robust mechanical components, such as the Rancho shock absorbers that have a twin-tube design. An off-road suspension system and multiple skid plates provide enhanced protection against rough terrains and inclement weather. Additionally, this full-size pickup truck has the Park Grade Hold Assist technology that improves towing on steep terrains.
Having the High Idle Switch, the 2021 GMC Sierra 3500HD is more efficient than ever before. By minimizing the tachometer readings, this technology improves fuel economy in the city. This heavy-duty pickup truck gets up to 12 MPG in the city and 18 MPG on the highway according to EPA guidelines. Having a 36-gallon fuel tank, the vehicle offers a maximum driving range of approximately 650 miles on the highway. However, the Diesel Exhaust Fluid reservoir has a different capacity.
Featuring textured pads to prevent the risk of slipping, round assist steps are available on the 2021 Sierra 3500HD. Available in chrome or black, these accessories measure 4 inches or 6 inches in diameter. The same color options and cross-sectional dimensions are available for rectangular assist steps. Having a low profile for enhanced access, the AT4 High Clearance Steps are made of lightweight cast aluminum. Some models boast power-retractable assist steps with LED perimeter lights.
This powerful GMC pickup truck is equipped with the MultiPro Tailgate, which comes with hitch lighting and a power lock-and-release function. The patented tailgate is also available with step lights for enhanced visibility at night. An electronic key fob can be used to remotely lock and unlock the advanced tailgate. A spray-on bedliner is another convenient accessory that's optional for this durable vehicle.
Measuring 15 inches diagonally, a multi-color head-up display is optional inside the 2021 Sierra 3500HD. This high-resolution HUD is connected to the GPS navigation system, TPMS, off-road inclinometer and other systems in real time. An infotainment system with an 8-inch color touch screen is another high-tech feature inside this full-size pickup truck.
Compatible with most smartphones, the myGMC mobile application provides extra utility for towing. Some highlights of this exclusive app include the Pre-Departure Checklist, Trailering Health and Trailer Light Test. Additionally, the multimedia system is compatible with the iN-Command Control System for universal connectivity. Of course, Android Auto, Bluetooth and Android Auto are available inside this heavy-duty GMC model.
When handling the 2021 GMC Sierra 3500HD, the driver can look at 15 different views from external camera systems. For example, the Bed View Camera is strategically installed on the Center High Mount Stop Lamps. This optical system includes the Hitch Guidance and Zoom View for optimum awareness of whatever is on the bed. The Rear Trailer View and HD Rear Vision Camera provide additional visual cues in real time.
This heavy-duty GMC pickup truck offers multiple accident-mitigation features, like the Automatic Emergency Braking and Side Blind Zone Alert. Parking shouldn't be a hassle thanks to the Front and Rear Park Assist and Rear Cross Traffic Alert. Additionally, this robust model offers the Safety Alert Seat, Rear Sear Reminder and Teen Driver.
The 2021 GMC Sierra 3500HD is optimized for heavy-duty towing and off-road driving. Besides having stunning mechanical capabilities, this full-size pickup truck offers lots of exclusive electronic technologies, such as a 15-inch HUD and an 8-inch infotainment system with GPS navigation and mobile apps.
Formula for Calculating Dealer Cost:
Total Dealer Cost - Rebate and Incentive + Taxes / Licensing Fees = True Dealer Cost. (You can get rebates and incentives here.)
Note: All GMC Sierra 3500HD 4WD MSRP, invoice and dealer cost dollar figures above are approximate amounts. Prices are subject to change without notice.
A note about rebates: Most rebates are subtracted from the "on the road" figure. In most cases, you can have the rebate if you are arranging your own financing or you are paying cash. If you decide to use the manufacturer’s low interest financing, you do not usually get the rebate. Ask your dealer for details.