A 2015 study commissioned by Unifor, which represents GM employees, estimated that shutting the plant would eliminate 4,100 direct jobs and reduce Ontario's gross domestic product by C$1.1 billion.
According to the company's website, the Oshawa Assembly Plant employs 2,522 workers with Unifor Local 222.
That means the demises of all three plants are imminent, right?
Most of the factories to be affected by GM's restructuring build cars that won't be sold in the US after next year.
The moves include shuttering seven plants worldwide as the company responds to changing customer preferences and focuses on popular trucks and SUVs and increasingly on electric models.
On the same day that GM announced layoffs of up to 14,000 workers at as many as five plants in North America, including MI and Ohio, Mr. Trump told reporters he had a stern phone call with CEO Mary Barra in which he reminded her of taxpayers' $80 billion bailout of the auto industry in 2008.
Barra did not link Monday's cuts to tariff pressures, but said trade costs are among the "headwinds" GM faces as it deals with broader technology change and market shifts.
"I've moved my family twice for this company and they do this to me", a tearful worker told CBC TV as he left the plant. Under its collective agreement with the UAW, GM must negotiate the closure of those plants with the union. We want to make sure we're well-positioned. "He said the ship has already left the dock". But Chevrolet has been making cars in Oshawa for more than a century. The Cruze compact auto will be discontinued in the United States market in 2019. The Detroit carmaker then opened its own plant in 1953, with production boosted by the 1965 auto pact that allowed cars to be shipped more easily to the USA market. The vehicle produced there is also is built in Mexico. GM has several plants running well below that. The junior hockey team, where Bobby Orr once played, is called the Oshawa Generals, and they played at the GM arena until it was renamed in 2016.
UAW, the autoworkers union, blasted GM's decision, saying the company was just looking for cheaper workers, and vowed to fight back.
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Trump continued, "This country is so much stronger now than it was when I took office that you wouldn't believe it". It's a awful thing when judges take over your protective services, when they tell you how to protect the border.
Oshawa now has two assembly lines.
Bobbi Marsh, who has worked at the Lordstown plant since 2008 and whose father was there 42 years, said so many other jobs depend on the plant.
Do you think enough has been done to protect auto industry jobs in Canada?
United Auto Workers Vice President and Director of the GM Department Terry Dittes said said the "callous decision by GM to reduce or cease operations in American plants, while opening or increasing production in Mexico and China plants for sales to American consumers, is, in its implementation, profoundly damaging to our American workforce". Is this part of something that's happening across Canada?
The decision, announced Monday, will impact Detroit-Hamtramck Assembly in Detroit, Lordstown Assembly in Warren, Ohio, and Oshawa Assembly in Oshawa, Ontario.
"I'm concerned, I haven't heard from General Motors yet and I'm waiting to hear what the story or announcement is tomorrow", Henry tells 680 NEWS.
Ohio's incoming governor, Republican Mike DeWine, said he plans on meeting with GM officials and make a case for the plant after he takes office in January.
In the meantime, GM is trying to reinvent how it makes vehicles. The company said it is aiming to save $6.5 billion in "cost efficiencies" through 2018.
Both U.S. vehicle assembly plants scheduled to stop production next year now build slow-selling passenger cars.