The GMC Sierra 3500HD is a workhorse built to surpass your expectations of a Heavy Duty truck. Its turbo-diesel engine roars to life under the grip of a leather-wrapped heated steering wheel. 

Continue reading for a full breakdown of key features and performance details.

Inside the 2020 GMC Sierra 3500HD


Engineered to perfection inside and out, what catches your eye first on the Sierra 3500HD is its striking exterior. With brilliant colors like Red Quartz Tintcoat, Dary Sky Metallic, and White Frost Tricoat premium finishes to choose from, your 2020 Sierra 3500HD can be as unique as you. 

This spacious truck has the Best-In-Class Heavy-Duty configurable bed that holds between 69.6 and 83.5 cu.ft. of cargo, plus a crew cab with 43” of front head room and 44.5” of front leg room. You can fit serious gear inside and out, and you can even hide your valuables within the in-seat storage. 


The Sierra 3500HD is pure muscle, with an Allison® 10-speed Automatic Transmission fitted to an available 6.6L Duramax Turbo Diesel V8 engine. The truck has a maximum trailering capacity of up to 25,000 lb. when properly equipped. The innovative GMC MultiPro tailgate has 6 functions to make loading and unloading easier. 

An Autotrac® 2-speed transfer case with push button controls lets you easily switch between 2WD, Auto, 4WD, and 4WD Lo so you aren’t limited to where this vehicle can take you.

Safety and Technology

Safety is always a first priority and the 2020 GMC Sierra 3500HD safety features not only help you drive confidently, they are also incredibly convenient. These are just a few samples of what GMC has to offer:

  • Front and Rear Park Assist
  • Safety Alert Seat
  • Automatic Emergency Braking
  • Rear Cross Traffic Alert
  • Following Distance Indicator

Hauling or towing are now safer than ever before thanks to state-of-the-art technology like the ProGrade™ Trailering System that offers an in-vehicle Trailering App, a 15” diagonal Head-Up Display, and an available class-leading 15-view camera system. Smartphone integration with Apple CarPlay™ and Android Auto™ also let you stay connected on the road and on the job.

Test Drive the Sierra 3500HD in Raleigh, NC

If you’re ready to test drive the 2020 GMC Sierra 3500HD truck today, visit Thompson Buick GMC. We have a variety of new GMC trucks for sale in Raleigh, NC. Give us a call or stop by our dealership for more information, and remember to ask about our new GMC specials.