Stuff I read was it's their own chassis and the body is composite. I think it's based on the Silverado in the sense that it has four wheels and is a pickup truck. Is the author confusing this with Via motors?
Workhorse W-15 Pickup reportedly available in 2019
Autoweek reports Workhorse promises 80 miles of range, 5,000 pounds of towing and exportable power for tools. And they say it's based on a Chevy Silverado.
http://autoweek.com/article/ces/you...er&utm_content=body&utm_campaign=awdailydrive
