The all-new 2020 GMC Sierra Heavy Duty, with a longer wheelbase and taller overall height, is powered by a 445 horsepower Duramax 6.6L turbo-diesel engine mated to a an all-new 10-speed Allison automatic transmission. The bigger frame, stronger propulsion and technologies are expected to deliver towing capacity well in excess of 30,000 pounds. The ProGrade Trailering system features available 15 camera views, including a transparent trailer view to virtually see through a trailer in tow. The 2020 Sierra HD goes on sale later this year in 2500HD and 3500HD dual rear wheel and single rear wheel configurations. Pricing and complete specifications will be announced later. Click here to see GMC Sierra overview interview.
