Source: Introducing the All-New 2020 Sierra Heavy Duty

As of the time of writing this post, General Motors has already released the Next-Generation Chevrolet-branded Heavy-Duty Pickup Truck.

Just recently, they have released the GMC-branded Heavy-Duty Pickup Truck.

For more information, please see this earlier post:

Most Capable, Most Advanced Silverado Heavy Duty Ever to Debut in February 2019