• All-new for 2020
  • Duramax turbodiesel now makes 910 lb-ft of torque
  • New 10-speed Allison automatic transmission
  • MultiPro 6-function tailgate available
  • 15-view camera system “sees through” trailer
  • On-sale Summer 2019
  • Pricing to be announced closer to launch


Need proof that size matters? Just look to the heavy-duty pickup truck segment. The newest entry is the all-new 2020 GMC Sierra HD, a seriously massive pickup that’s not afraid to go big. It’s longer and taller with a longer wheelbase than the current model, yielding impressive spaciousness inside along with an amply roomy cargo box.

The output from its revised 6.6-liter Duramax turbodiesel engine is similarly massive. Making 445 horsepower and 910 lb-ft of torque, a properly equipped Sierra HD diesel will tow “well in excess of 30,000 pounds” according to predictions by GMC. Details on the gasoline engine haven’t been revealed but both engines will be paired with a new 10-speed Allison automatic transmission.

Innovative tailgate

Complementing the new Sierra Heavy Duty’s mass is an abundance of ingenuity. The MultiPro 6-function tailgate we adored in the light-duty Sierra 1500 has thankfully found its way to the Sierra HD, making it easier to access and climb into the cargo box or carry odd-sized gear. Another welcome bit of cleverness is the Sierra HD’s camera system. Integrating a range of built-in and accessory cameras, the system offers 15 different views including a transparent trailer view that creates a virtually unblocked view rearward when towing. Intelligent and powerful, the new Sierra HD looks to be a strong contender in a competitive category where might makes right.

Class of 2020: The New and Redesigned Cars, Trucks and SUVs

Offered in 2500HD or 3500HD versions with dual or single rear-wheel configurations, the 2020 GMC Sierra HD arrives in dealers in the summer of 2019. Pricing has yet to be announced, but the current GMC Sierra HD starts at $34,940 for 2500 models and $36,100 for the 3500.

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