2021 Sierra Heavy Duty
Sierra Heavy Duty 2021 GMC
Starting At $35,900*
TOW UP TO 36,000 LBS**
Horsepower 401 hp
Sierra Heavy Duty Trims Find out which one is the right fit for your lifestyle.
AT4 From $58,400*
DENALI From $64,900*
What's Your Style? The choice is yours.
Discover More About The Sierra Heavy Duty
DOMINANT PULLING POWER
Sierra HD Denali was built strong so you can tow strong — with its large drive shaft and real axle, the power of the available Allison® 10-speed automatic transmission, the first in a heavy-duty truck in its class, and available 6.6L Duramax® Turbo-Diesel V8 engine is maximized so you can tow with command and control.
INTERIOR WITH INTENTION
Sierra Heavy Duty’s refined and expansive cabin offers advanced, thoughtfully placed technology to help ensure your ride is smooth and smart.
*The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. See your GMC dealer for details.
**Requires available Duramax 6.6L Turbo-Diesel V8 engine.
^Premium color available at an additional cost.
^^Premium color available at an additional cost. Late Availability.
^^^Premium color available at an additional cost. Not available on base Sierra or SLE trims.
1Excludes other GM vehicles.
2App functionality and features vary with vehicle equipment and trim level. Data connection may be required. Some features require active service plan and working electrical system. Terms and limitations apply.
3Read the vehicle Owner’s Manual for important feature limitations and information. Some camera views require available accessory camera and installation. Not compatible with all trailers. See your dealer for details.
4Read the vehicle’s Owner’s Manual for important feature limitations and information.
5Cargo and load capacity limited by weight and distribution.
6Rear-seat HVAC outlets available on Double and Crew Cab models only.
7iN•Command® is provided by ASA Electronics and is designed to operate within 30 feet of the trailer. Works with trailers equipped with iN•Command® Control Systems with Global Connect via Bluetooth connection. Control and monitoring functionality varies by trailer manufacturer, model, and installed options. Use of the iN•Command® Controls Systems feature through the myGMC mobile app requires an active service plan. User terms apply. See onstar.com for details and limitations.
8Excludes other GM vehicles. Read the vehicle Owner’s Manual for important feature limitations and information. Some camera views require available accessory camera and installation. Not compatible with all trailers. See your dealer for details.
9Read the vehicle’s Owner’s Manual for important feature limitations and information.
10Safety or driver assistance features are no substitute for the driver's responsibility to operate the vehicle in a safe manner. The driver should remain attentive to traffic, surroundings and road conditions at all times. Visibility, weather, and road conditions may affect feature performance. Read the vehicle's Owner's Manual for more important feature limitations and information.
11Available on select Apple® and AndroidTM devices. Service availability, features and functionality are subject to limitations and vary by vehicle, device, and the plan you are enrolled in. Device data connection required. Visit onstar.com for more details.
12Actual iN•Command® functionality may vary with the smart trailer integration.
13SiriusXM audio and data services each require a subscription sold separately, or as a package, by Sirius XM Radio Inc. If you decide to continue service after your trial, the subscription plan you choose will automatically renew thereafter and you will be charged according to your chosen payment method at then-current rates. Fees and taxes apply. Please see the SiriusXM Customer Agreement at www.siriusxm.com for complete terms and how to cancel, which includes calling SiriusXM at 1-866-635-2349. All fees, content and features are subject to change. Traffic information not available in all markets. SiriusXM, Automatic, Pandora and all related logos are trademarks of Sirius XM Radio Inc. and its respective subsidiaries.
14Vehicle user interface is a product of Apple and its terms and privacy statements apply. Requires compatible iPhone and data plan rates apply. Apple CarPlay is a trademark of Apple Inc. Siri, iPhone and Apple Music are trademarks of Apple Inc, registered in the U.S. and other countries.
15Vehicle user interface is a product of Google and its terms and privacy statements apply. Requires the Android Auto app on Google Play and an Android compatible smartphone running Android™ 5.0 or higher. Data plan rates apply. Google, Android, Google Play and Android Auto are trademarks of Google LLC.
16SLT trim only