New GMC Sierra Heavy Duty Trucks

1*GM Employee Discount Program (EVPP) A. Eligible Participants - This Program is available only to: 1) Active GM employees. 2) Retired GM employees. 3) Former GM employees with more than 5 total years of cumulative service. 4) Widows/widowers of former GM employees with more than 5 total years of cumulative service. B. Sponsored Purchasers Eligible active, retired, former hourly or salaried GM employees with more than 20 total years of cumulative service, and widows and widowers of former GM employees with more than 20 total years of cumulative service can sponsor the following purchasers: their spouse, children, stepchildren, grandchildren, step grandchildren, grandparents (including in-law and step), parents, stepparents, siblings (including full, half and step), mother-/father-in-law, sons-/ daughters-in-law, brothers-/sisters-in-law, aunts, uncles, nieces and nephews. Eligible former hourly or salaried GM employees with 5-20 total years of cumulative service and widows and widowers of former GM employees with 5-20 total years of cumulative service can sponsor the following purchasers: their spouse and dependent children. (Children must be under 21 years of age or full-time students under 25 years of age at the time of purchase.) May not be compatible with all offers. See dealer for details.

Discover Professional-Grade Power and Capability with the 2021 GMC Sierra HD

If you're looking for a powerful heavy-duty truck to optimize your productivity on the job site, the new 2021 GMC Sierra HD is the right place to look. The latest Sierra HD offers incredible towing capability, a stylish design, and cutting-edge features to help you get the most out of your time on the road.

As a GMC dealer, you will find a broad range of new Sierra HD models in our lot. We are known for our exceptional customer service by providing the information you need in a pressure-free environment. With our online tools and resources, you can save time on-site and get started from the comfort of your home. Our GMC-authorized service center ensures that you can keep your Sierra HD running like new.

Learn more about the new 2021 Sierra HD to see if it's right for you.

What's New for 2021?

The most significant changes to the new 2021 Sierra HD are the new and improved trailer assistance features. With a new jack-knife alert and trailer length indicator, you can trailer with more confidence and safety.

The MultiPro tailgate is now standard of the SLE trim level for outstanding utility and convenience. Three paint options have been added for more personalization. When it comes to the top-of-the-line Denali trim level, you can expect a newly standard high-definition 360-degree camera and a bed-view camera, along with a new Diamond Edition. The AT4 trim level is now available with mud-terrain tires and a high-clearance step accessory.

  • Wireless Apple CarPlay/Android Auto standard from SLT trim
  • Denali Black Diamond Edition includes a Kicker audio system
  • Top towing capacity increased to 36,000 pounds


The new Sierra HD is built to take on the most challenging jobs with confidence. With a best-in-class available towing capacity of 36,000 pounds, you can take on hauling everything from construction equipment to trailers with a newfound sense of possibility and efficiency. With its large driveshaft and rear axle, the Sierra HD provides increased durability and strength. Its improved brakes and independent front suspension ensure responsive steering and maneuverability.

The new Sierra HD offers two engine options to match your driving needs. A standard 6.6-liter V8 engine produces 401 horsepower and 464 pound-feet of torque. If you're looking to maximize your power, there is the option of a 6.6-liter V8 Turbo Diesel that delivers an impressive 445 horsepower and 910 pound-feet of torque.

With a maximum payload of 5,607 pounds, you can load up the cargo bed with everything from gravel to lumber.

Some of the top performance features available for the new Sierra HD include:

  • Electronic shift two-speed transfer case with push-button controls
  • Allison® 10-speed automatic transmission
  • Hill Descent Control
  • Integrated trailer brake controller
  • StabiliTrak, electronic stability control system with traction control


The new Sierra HD has a dominating road presence with muscular shoulders and a large grille. However, you can expect a highly practical exterior design to enhance your capability and ease on the job site. All Sierra HD models are equipped with trailering mirrors for exceptional visibility. Available power-adjustable trailering mirrors power extend, fold, and retract at the touch of a button to meet your needs.

Some of the top design features include:

  • Cargo bed LED lighting
  • CornerStep rear bumper
  • GMC MultiPro Tailgate
  • LED taillamps
  • ProGrade Trailering System


  • 4G LTE Wi-Fi® hotspot capable
  • 8-inch diagonal Premium GMC Infotainment System with Navigation
  • Apple CarPlay™ and Android Auto®
  • Bed View Camera
  • Wireless Charging

Explore Our New 2021 Sierra HD Inventory

Want to learn more about the new 2021 Sierra HD? Contact us today to schedule a test drive!