GM operated the Fremont plant from 1962 - 1982; our '65 4-4-2 was built there. They also made El Caminos, trucks, etc.
NUMMI built the 1st Nova (nice small car, like a Toyota) in 1884. The 1st Corolla/Prizm came in 1986. 1991 brought the Toyota PU; I had a '93 that went over 500K. By 2009 GM was facing Chapter 11 bankruptcy. The Fremont Mayor and Gov Swarzenegger lobbied to keep the plant open, but to no avail. Toyota pulled out in 2010. At the time they were building a Tundra line. On April 1, 2010, NUMMI produced its last car. About 5,000 employees were laid off.
In May 2010 Tesla announced they would purchase the site for $42M from Toyota, well under market value. It was a sweetheart deal. I remember the 2 page ads in the SJ Mercury-News encouraging ex-NUMMI workers to apply.
Tesla officially took possession of the site on October 19, 2010, and started work inside on October 27. The state of California awarded Tesla $15 million in tax credits if employment and investment goals were met. The first retail delivery of the Tesla Model S took place during a special event at the factory on June 22, 2012.
Tesla started production with 1,000 workers. By 2013, this had risen to 3,000, and to 6,000 people in June 2016. In 2016, preparing for Model 3 production, Tesla planned to increase their work force to about 9,000 people. In fall of 2017, Tesla employed some 10,000 at the Fremont plant. As of 2022, the factory employed about 22,000 people, far greater than the 5,500 employees of NUMMI, and produced nearly 560,000 vehicles, 30 percent more than the maximum output of NUMMI.
In addition, there is a significant number of contract personell.
An American success story!