Gabriel Ehrlich, director of the University of Michigan’s Research Seminar in Qualitative Economics, estimates that the Michigan economy is growing at an annual rate of 1.4 percent. Without the strike, he said, that number could be 0.1 to 0.2 points higher.

Even before the strike, manufacturing employment in Michigan fell by 1,300 jobs in the first eight months of the year. By comparison, manufacturers added 43,000 jobs nationally in the same period.

“There’s been real damage to the economy,” said Charles Ballard, an economics professor at Michigan State. “It hasn’t been huge yet, but the ripple effects will get bigger the longer this goes on.”

In Flint, at least 1,200 truckers and production workers from suppliers have lost their jobs because of the strike. That includes hundreds from a supplier of seats to G.M., Lear Corporation, according to Duane Ballard, the financial secretary for U.A.W. Local 659, which represents employees at that factory.

A Lear spokesman did not respond to a request for comment.

Many of those workers are new hires who have not worked at the Lear plant long enough to qualify for state unemployment insurance, Mr. Ballard said.

On a rainy night last week, more than two dozen people affected by the strike showed up at the Martus Luna Food Pantry in Flint, said Art Luna, who runs the pantry.

They “are the ones that are really hurting,” he said. “They’re anxious to go back to work.”

The fallout has extended beyond the auto industry, disrupting local businesses that serve autoworkers.