GM has informed the Canadian government of the plan.
President Donald Trump said he was "not happy" with the decision and spoke "very tough" with GM CEO Mary Barra about the moves.
"They are not closing our damn plant without one hell of a fight", Dias told the audience, some still drenched from holding an impromptu picket line in the driving rain.
Reports confirmed by the Sun say US auto giant General Motors will shutter the company's Oshawa, Ont. vehicle assembly plant, putting thousands of employees out of work. GM propulsion plants in White Marsh, Maryland and Warren, Michigan will also be shut.
GM employs approximately 2,800 people in Oshawa, down from a peak of 23,000 during the 1980s.
The possibilities underlie the amount of competition and disruption the industry is going through, said Justin Gammage, manager of the Durham Autonomous Vehicle Innovation Network. But the operations remain unprofitable.
The vehicles being assembled at the three factories will all phase out next year.
"The prime minister doesn't view this as a fait accompli and he's going to roll up his sleeves and fight with us, and that's what we want from him", Dias said.
The news wasn't entirely surprising. On Monday, he told reporters at Queen's Park that he had a conversation with the head of GM Canada and asked what his government could do but was told that "the ship has already left the dock". She later told analysts that the company is "committed to working with GM's unions", however it will be a balancing act for GM to not overplay its hand.
According to the automaker, the Oshawa Assembly in Oshawa, Ontario, Canada; the Detroit-Hamtramck Assembly in MI; and the Lordstown Assembly in Warren, Ohio, each will be "deallocated" by the end of 2019 as GM reorganizes its manufacturing capacity to focus on electric and self-driving vehicles and prepares for a downturn in the auto market or a weakening on the USA economy.
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She added: "We shouldn't just accept an outcome for the sake of it - we should try to get a deal that is good for everybody". The Prime Minister used to say that.
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McCann thanked Charlie Culberson for agreeing to give up No. 16, which the utility player wore in 2018 for the Braves. He batted.270 with 33 home runs and 78 RBIs despite playing just 113 games during an injury-shortened 2017 season.
Workers at the Oshawa plant walked off the job Monday after they were given the information about their plant's closure.
He says it's still hard to say exactly how much impact the closures will have on the rest of the supply chain, including at auto parts plants in the Quinte Region.
Oshawa now makes the Impala, a model which some suspect is headed for extinction. "It might actually help the membership focus on jobs and survival more than getting more, more and more in terms of raises, benefits and bonuses".
Oshawa Mayor John Henry said he hopes the news is "just a rumour", and adds that he had not spoken to anyone from GM. That has not occurred; however, it is expected.
Conservative Leader Andrew Scheer described GM's apparent plans as "terrible news" for auto workers. Trudeau is scheduled to meet with executives from GM rival Ford on Parliament Hill Monday afternoon.
But doing so also leaves automakers vulnerable to shifts in consumer preference back to passenger cars. Last month, GM rival Ford Motor.
The US$6-billion in savings includes cost reductions of US$4.5 billion and lower capital expenditure annually of nearly US$1.5 billion, GM said.
GM expects to record pre-tax charges of $3 billion to $3.8 billion related to the announced actions, including $2 billion of employee-related and other cash-based expenses and $1.8 billion in non-cash accelerated asset write-downs and pension charges.
The cost of the changes will be spread out over the next two quarters.