The encyclopedia · People & Management · Operational decision · 1936–1937
GM's workers sat down on the factory floor for 44 days — and GM signed
In December 1936, UAW workers occupied GM's Flint plants. They sat on the factory floor for 44 days. GM called the police. The workers held. GM signed.
General Motors · UAW
HearsayWidely repeated, and we cannot show you a document for it. Read it for the lesson, not as fact.
What it means today
Every company with an integrated supply chain — a single factory that supplies all assembly lines, a single API that serves all clients — has the GM Flint problem. The integration is the strength and the vulnerability.
What happened
In December 1936, workers at General Motors' Fisher Body plants in Flint, Michigan, sat down on the factory floor and refused to leave. The sit-down strike — occupying the workplace rather than picketing outside it — was a tactic the UAW had learned from the rubber workers in Akron. The workers' demand: GM recognise the UAW as their bargaining representative.
GM's response was escalation. The company cut off heat and food to the occupied plants. The police attacked the Fisher Body No. 2 plant in the 'Battle of the Overpass' (January 1937), using tear gas and clubs. The workers fought back with door hinges and fire hoses. Fourteen workers were injured. The workers held.
After 44 days, GM signed. The company recognised the UAW as the bargaining representative for its workers. The agreement was the first major victory for industrial unionism in the United States. The factory-floor story, as the workers told it, was not about the contract. It was about the moment when the people who built the cars discovered they could stop the cars — and that stopping the cars was more powerful than building them.
Why it happened
- GM's management assumed the workers would not occupy the plants because the plants were GM's property. The sit-down tactic inverted the power relationship: the workers' leverage was their presence
- The company's escalation — cutting heat, sending police — backfired because it created a public spectacle. The workers' suffering generated sympathy that GM's legal arguments could not counter
- GM's production system was its vulnerability: the Fisher Body plants supplied bodies for all assembly lines. Occupying two plants stopped production across the entire company
The lesson
An integrated production system is vulnerable at every integration point. GM's supply chain was its strength — until the workers occupied the bottleneck. The more integrated, the harder the fall.
Aftermath
The Flint sit-down strike led to the unionisation of the entire American auto industry. The UAW became one of the most powerful unions in the United States. GM's Alfred P. Sloan later wrote that the company's mistake was not the labour cost but the loss of management control. The sit-down tactic was declared illegal by the Supreme Court in 1939 (NLRB v. Fansteel), but the union recognition stood.
Sources
- Flint sit-down strike — Wikipedia
- NPR — Flint Sit-Down Strikers: Equal Pay, Equal Conditions (oral history of the 1937 GM strike)
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