The Silverado HD front end has been changed to be more visually distinguished from the Silverado 1500.
The big truck is designed to tow and haul heavier loads than the 1500 can handle, but that comes at the expense of ride comfort.
The standard engine is a 401-hp, 6.6-liter V8 with a six-speed transmission.
A 445-hp, 6.6-liter turbodiesel V8 engine with a 10-speed transmission is also available.
The new truck is 10 inches longer than the previous one, which translates to more legroom.
GM claims that the new HD, when properly equipped, can tow up to 35,500 pounds.
Updates for 2021 include more trims that are available with FCW, AEB, BSW, and rear cross traffic warning.