There is speculation that GM could produce 38,000 Silverado EVs annually starting in 2023.
www.autonews.com
"GM declined to provide production timing at the Detroit plant, known as Factory Zero, but forecasting company AutoForecast Solutions expects output to start in late 2022. The company expects GM to build 38,000 electric Silverados annually starting in 2023."

GM adds to electric buildup
The battery-powered Silverado will be designed as an EV from the ground up and will be powered by the automaker's Ultium batteries, with a GM-estimated range of more than 400 miles on a full charge.

"GM declined to provide production timing at the Detroit plant, known as Factory Zero, but forecasting company AutoForecast Solutions expects output to start in late 2022. The company expects GM to build 38,000 electric Silverados annually starting in 2023."