The union representing thousands of autoworkers is vowing to fight back against the General Motors plan to close an Oshawa, Ont., plant in 2019 as part of a global restructuring.

It’s not clear how many of the 2,500 employees at the Oshawa assembly facility will lose their jobs under the sweeping strategy, which GM says aims to lower carbon emissions and prepare for a future of electric and autonomous vehicles.

Workers at the plant walked off the job Monday morning in protest.

Jerry Dias, national president of Unifor, blasted GM’s move, which he says violates its agreement with workers. He praised those who work at the plant, which is about 60 kilometres east of Toronto.

“You’re the No. 1 plant that [GM’s] got,” he told the crowd.

“They are not closing our damn plant without one hell of a fight.”

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