DETROIT (AP/KDKA) -- More than 49,000 members of the United Auto Workers walked off General Motors factory floors or set up picket lines early Monday as contract talks with the company deteriorated into a strike.
Workers shut down 33 manufacturing plants in nine states across the U.S., as well as 22 parts distribution warehouses.
It wasn't clear how long the walkout would last, with the union saying GM has budged little in months of talks while GM said it made substantial offers including higher wages and factory investments.
It's the first national strike by the union since a two-day walkout in 2007 that had little impact on the company.
GM workers joined striking Aramark-employed janitors assigned to GM facilities on the picket lines Sunday night at a sprawling factory on the border between Detroit and the small town of Hamtramck.
Worker Patty Thomas said she wasn't scheduled to picket, but came out to support her colleagues at the car plant, which GM wants to close.
She's heard talk that GM may keep the factory open and start building electric pickup trucks there, but she's skeptical.
"What are they going to take away?" she asked. "That's the big issue."
She said workers gave up cost-of-living pay raises to help GM get through bankruptcy, and workers want some of that back now that the company is making profits.
In Ohio, workers at the plant in Parma, just south of Cleveland, hit the picket lines just after midnight.
Striking GM employees were joined on the picket lines by workers from Ford and Fiat Chrysler, who are working under contract extensions.
Night shift workers at an aluminum castings factory in Bedford, Indiana, that makes transmission casings and other parts shut off their machines and headed for the exits, said Dave Green, a worker who transferred from the now-shuttered GM small-car factory in Lordstown, Ohio.
Green, a former local union president, said he agrees with the strike over wages, plant closures and other issues.
"If we don't fight now, when are we going to fight?" he asked. "This is not about us. It's about the future."
UAW Vice President Terry Dittes, the union's top GM negotiator, said a strike is the union's last resort but is needed because both sides are far apart in negotiating a new four-year contract. The union, he said Saturday, does not take a strike lightly.
"We clearly understand the hardship that it may cause," he said. "We are standing up for fair wages, we are standing up for affordable quality health care, we are standing up for our share of the profits."
GM, however, said it offered pay raises and $7 billion worth of U.S. factory investments resulting in 5,400 new positions, a minority of which would be filled by existing employees. GM would not give a precise number. The company also said it offered higher profit sharing, "nationally leading" health benefits and an $8,000 payment to each worker upon ratification.
Because public statements from both sides conflict, it's hard to tell how long the strike will last, said Kristin Dziczek, vice president of labor and industry at the Center for Automotive Research, an industry think tank. The length "depends on how far apart they really are and where the lines in the sand are drawn," she said.
Talks were scheduled to resume at 10 a.m. EDT on Monday.
The union's contract with GM expired Saturday night, but pacts with the company's crosstown rivals, Ford and Fiat Chrysler, were extended indefinitely. The union has picked GM as its target company this year, and any deal it negotiates will be used as a template for the others. GM was picked because it's the most profitable of the three, and because its plans to close four U.S. factories have angered union members.
On Sunday, about 200 plant-level leaders voted unanimously to strike against GM if no deal could be reached by Sunday night. Although talks were halted over the weekend, UAW spokesman Brian Rothenberg said there was still dialogue.
Before the talks broke off, GM offered to build a new all-electric pickup truck at a factory in Detroit that is slated to close next year, according to a person who spoke to The Associated Press on condition of anonymity. The person wasn't authorized to disclose details of the negotiations.
The automaker also offered to open an electric vehicle battery plant in Lordstown, Ohio, where it has a huge factory that has already stopped making cars and will be closed. The new factory would be in addition to a proposal to make electric vehicles for a company called Workhorse, the person said.
It's unclear how many workers the two plants would employ. The closures, especially of the Ohio plant, have become issues in the 2020 presidential campaign. President Donald Trump has consistently criticized the company and demanded that Lordstown be reopened.
Rothenberg said UAW was striking for fair wages, affordable health care, profit sharing, job security and a path to permanent employment for temporary workers.
GM has factories in Michigan, Ohio, New York, Kentucky, Tennessee, Texas, Missouri, Indiana and Kansas.
A strike would bring to a halt GM's U.S. vehicle and parts production, and would likely stop the company from making vehicles in Canada and Mexico as well. That would mean fewer vehicles for consumers to choose from on dealer lots, and it would make it impossible to build specially ordered cars and trucks.
Analysts at Cox Automotive said GM has enough vehicles on dealer lots to last about 77 days at the current sales pace. That's well above the industry average of 61. But supplies of the Chevrolet Tahoe and Suburban large SUVs, which generate big money for the company, are well below the industry average.
The talks this year have been overshadowed by a growing federal corruption probe that snared a top union official on Thursday. Vance Pearson, head of a regional office based near St. Louis, was charged in an alleged scheme to embezzle union money and spend cash on premium booze, golf clubs, cigars and swanky stays in California. It's the same region that UAW President Gary Jones led before taking the union's top office last year. Jones himself has been touched by the investigation, leading some union members to call for him to step down, but he hasn't been charged.
This year's talks between the union and GM were tense from the start, largely because of GM's plan to close four U.S. factories, including the one on the Detroit border with the enclave of Hamtramck, as well as Lordstown and factories in Warren, Michigan, and near Baltimore.
Here are the main areas of disagreement:
— GM is making big money, $8 billion last year alone, and workers want a bigger slice. The union wants annual pay raises to guard against an economic downturn, but the company wants to pay lump sums tied to earnings. Automakers don't want higher fixed costs.
— The union also wants new products for the four factories slated to close. GM currently has too much U.S. factory capacity, especially to build slower-selling cars.
— The companies want to close the labor cost gap with workers at plants run by foreign automakers. GM pays $63 per hour in wages and benefits compared with $50 at the foreign-owned factories. GM's gap is the largest at $13 per hour, according to figures from the Center for Automotive Research.
— Union members have great health insurance plans and workers pay about 4% of the cost. Employees at large firms nationwide pay about 34%, according to the Kaiser Family Foundation. Automakers would like to cut costs.
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