General Motors’ flagship electric vehicle plant has become a visible test case for a bigger question in manufacturing: how much factory work should move from people to robots, and what happens to workers when it does?
At GM’s Factory Zero plant in Detroit, Michigan, approximately 50 robot arms have been installed while 1,300 workers remain out of work after what was described as a temporary layoff in March. The robots, made by the Japanese robotics company FANUC, are intended to help attach components to vehicles during assembly.
What changed at Factory Zero
The new robot arms arrive at a sensitive moment for the plant. Leaders at United Auto Workers (UAW), the primary US union for autoworkers, objected to the installation because GM has not yet called back any of the workers affected by the March layoffs.
James Cotton, president of UAW Local 22, told The Detroit News that more than 1,000 union members are still “laid off indefinitely.” He argued that GM could bring some of those members back instead of installing the 50 robots.
The labor tension did not begin with the latest automation push. The temporary layoffs followed permanent layoffs involving another 1,200 workers at GM’s Factory Zero in October 2025. That sequence is central to the union’s reaction: workers were already facing job losses before a new wave of automation appeared on the line.
Why the union sees a larger threat
For UAW leaders and organizers, the issue is not simply whether a robot arm can perform one assembly task. The deeper concern is whether automation becomes a reason to reduce jobs, hold down wages, or reshape factory work without returning laid-off employees.
Andrew Bergman, a Local 22 member and union organizer who was among those laid off by GM, framed the issue as a conflict over who benefits from technological progress. He told The Detroit News that technology could make work safer and support a shorter work week without lost pay, but said that in the hands of corporate leaders it is used to increase profits and lay off workers.
The Detroit News also described a sharp divide between messages delivered by corporate leaders and workers during separate Detroit gatherings held in the same week of June. At the Reindustrialize Summit, startup founders spoke about robots that could “empower our industrial base with superhuman manufacturing.” At the UAW Constitutional Convention, UAW president Shawn Fain warned against “the threat of humanoid robotics and mass automation” undermining employment and wages during a period of rising wealth inequality.
That contrast captures the debate around industrial automation. One side emphasizes productivity, capacity, and industrial strength. The other side asks who carries the cost when machines replace or reduce human labor.
Automakers are already moving toward more robotics
GM is not alone in using assembly-line robots. Stellantis NV and Ford Motor Company have deployed robots such as Fanuc robot arms as they automate more of their US operations. Hyundai Motor Company also plans to deploy Atlas humanoid robots made by Boston Dynamics, which Hyundai acquired in 2020, at its flagship EV facility in Georgia by 2028.
The spread of robotics across automakers helps explain why the Factory Zero dispute matters beyond one Detroit plant. EV manufacturing is becoming a place where companies test new production systems, and those systems increasingly include industrial robots, AI-linked facilities, and in some cases humanoid robotics.
For workers, that makes the question immediate. If companies can add robot arms while laid-off workers wait to be recalled, unions are likely to view automation as a labor issue rather than only a technology upgrade.
The dark factory model raises the stakes
The debate also sits inside a broader shift toward “dark factory” production. These facilities use near-complete automation, with only a small human staff responsible for oversight and troubleshooting. Companies in East Asia have already moved ahead with multiple dark factory sites.
FANUC itself is one of the early dark factory pioneers. The company has operated a “lights out” factory since 2001, meaning the robot arms now used by GM and other automakers were themselves largely built by robots.
Chinese companies are now prominent among the latest dark factory examples. The automotive brand Jetour has a dark factory producing SUVs in Fuzhou in China’s Fujian province. Zeekr, a luxury EV maker, has a dark factory in Ningbo City in China’s Zhejiang province capable of producing up to 300,000 cars per year, according to The Wall Street Journal.
Xiaomi has also leaned heavily into automated production. The Chinese smartphone maker uses more than 700 robots at its EV Hyperfactory in Beijing to help produce a new electric vehicle every 76 seconds, according to The EV Report. Xiaomi already had another heavily automated dark factory in Beijing capable of producing 10 million phones annually.
Automation brings capacity and risk
The case for automation is straightforward from a business perspective: companies are betting that lower labor costs and greater production capacity are worth the investment. China’s manufacturing industry had deployed 2 million industrial robots by 2024 and added 295,000 robots in that year alone. Japan installed 44,500 industrial robots in 2024, while the United States installed 34,200.
China’s latest five-year plan also puts AI and robotics at the center of its economic blueprint as the country looks ahead to 2030. That focus may give Chinese automakers a competitive edge as global EV adoption continues to rise.
But heavy automation brings its own weaknesses. The Institution of Mechanical Engineers has pointed out that humans can often identify production-line problems quickly before they spiral in a fully automated system. Cybersecurity also becomes more important in heavily automated, AI-powered facilities that rely primarily on robotic workforces.
The Factory Zero dispute shows why this issue is becoming difficult for automakers to separate from labor politics. Robots may improve manufacturing capacity, but when they arrive while workers remain laid off, the technology becomes a symbol of where the industry may be headed and who may be left out of that future.