2021 GMC Sierra HD Review | Specs, Trims & Offers

Be unstoppable with the 2021 GMC Sierra HD. This full-size truck offers a tough engine honed within a stylish exterior. To help you learn more about this confident model, Reed Buick GMC in Kansas, MO, crafted the following guide with information concerning the Sierra HD features. Once you’re finished reading, browse our available inventory to see which models we have to offer. Please direct any questions to our online form or call (816) 436-6300 and a representative will be happy to help you.

GMC Sierra HD Highlights

    • GMC Multipro Tailgate – This six-function feature opens up new
      possibilities for your workday.
    • Autotrac® Two-Speed Transfer Case with Push Button Controls –
      If traction is lost, this feature
      automatically engages four-wheel-drive until it’s regained.
    • Best-in-Class HD Cargo Bed Volume – Be prepared for any upcoming
      job with enough cargo room to
      carry everything you need.
    • Head-up Display and Rear Camera Mirror – Stay alert and easily view
      your surroundings with this
      useful feature.
2021 GMC Sierra HD

GMC Sierra HD Trim Options

Select your favorite configuration of the 2021 GMC Sierra HD.


Starting at $36,200 MSRP

2021 GMC Sierra HD


Starting at $59,100 MSRP

2021 GMC Sierra HD AT4


Starting at $65,500 MSRP

2021 GMC Sierra HD Denali



Sierra HD Engine Options

This pickup truck ensures that you’re equipped with a hardworking engine that can get the job done. Choose from two different engines, each with a unique set of strengths. The 6.6L turbo-diesel engine comes with an Allison® ten-speed transmission. The 6.6L V8 Gas engine comes with an Allison® six-speed transmission. View the powertrains below.

Engine 6.6L Turbo-Diesel V8 6.6L V8 Gas Engine
Horsepower 445 HP 401 HP
Torque 910 lb.-ft. 464 lb.-ft.
Max. Towing 14,500 lbs. 14,500 lbs.
Max. Payload 4,448 lbs. 3,798 lbs.

Sierra HD Technology

Jump into progress with the variety of tech-savvy features offered by the 2021 GMC Sierra
HD. This full-size truck makes work effortless with advanced features like 4G LTE Wi-Fi® hotspot capability, a six-speaker audio system, and Bluetooth®capability.

2021 GMC Sierra HD

Sierra HD Safety

If safety matters in your workday, the 2021 GMC Sierra HD is the truck for you. This
vehicle is built to keep you safe, so you can keep doing what you love without worry. To ensure your safety, the Sierra HD offers six airbags, an available bed view camera, and a following distance indicator.

2021 GMC Sierra HD Safety

Sierra HD Interior Design

The cabin of the 2021 GMC Sierra HD is built to give you a comfortable environment to
work in. This interior includes features that allow you to make the most of doing what you love, like heated driver and front outboard passenger seats, a heated steering wheel, and wireless charging.

2021 GMC Sierra HD Interior

Sierra HD Special Offers & Local Deals

Drive home with your new 2021 GMC Sierra HD at a great price when you utilize our various incentives. Our dealership rotates these specials monthly, so be sure to take advantage of one!

2020 GMC Sierra HD Deals banner

We appreciate your interest in our inventory, and apologize we do not have model details displaying on the website at this time. Please fill the form out below and our team will quickly respond, or, please call us at 800-291-9406 for more information.

Vehicle Finder Service

  • Contact Info

  • What Are You Looking For?

  • By submitting this form, you agree to be contacted with information regarding the vehicle you are searching for.
  • This field is for validation purposes and should be left unchanged.