The future, he said, was "scary", especially since his wife worked at the plant as well and they have an 11-month-old baby at home.
"While the union does not have complete details of the overall announcement we have been informed that, as of now, there is no product allocated to the Oshawa Assembly Plant past December 2019", the union said. "And we're not going to be pushed around. we deserve respect", he said.
"We have some of our most competitive parts plants in the world in Ontario.we have a very good workforce, we have very good equipment, and the latest in manufacturing".
GM names the Lordstown, Ohio, factory that makes the Chevrolet Cruze compact and the Detroit-Hamtramck plant, where the Chevrolet Volt, Buick LaCrosse and Cadillac CT6 are produced.
Oshawa Mayor John Henry said he hopes the news is "just a rumour", and adds that he had not spoken to anyone from GM.
By the early 1980s, more than 23,000 workers were employed at GM in Oshawa.
Unifor national president Jerry Dias said in April that the Oshawa complex was headed for closure in June of this year.
Volpe wants to see production shifted Oshawa in order to save the plant.
Unifor president Jerry Dias says General Motors' plan to close its auto plant in Oshawa, Ontario puts it on the brink of leaving Canada completely.
The automaker on Monday said Oshawa Assembly in Canada, Lordstown Assembly in OH and Detroit-Hamtramck Assembly in MI will end production in 2019 and not be allocated any products. GM propulsion plants in White Marsh, Maryland and Warren, Michigan will also be shut. GM did not announce plans to replace them with new models.
GM has said it believes self-driving and full-electric vehicles could eventually eclipse profits of its current operations.
Barra explained that GM is restructuring now, "while the company and the economy are strong, to stay in front of a fast-changing market".
GM CEO Mary Barra said the company is no longer focusing on the sedans and trucks manufactured in Oshawa. But he noted the former head of GM Canada, Steve Carlisle, was determined it wouldn't close on his watch.
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.
The announcement was part of a wide-reaching carpet bombing by GM on plants that weren't part of the company's hybrid future. We're sick and exhausted of GM shipping all our jobs to Mexico.
Canada's largest private sector union, Unifor, said in a statement on Sunday that it had received notification from General Motors that the company would make a major announcement on Monday that would impact its global operations.
One potential partner could be Honda Motor Co., which already has r&d relationships with GM for fuel cell and autonomous vehicles.
MP Erin O'Toole, whose riding of Durham includes part of Oshawa, said Monday that the news came as a surprise, as Oshawa seemed to have a reputation for being one of the company's most productive plants. "So we have a lot of pressure on them".
Scheer said that his party will call for an emergency debate in the House of Commons "to press the Liberal government for a plan on how they will respond to the thousands of people out of work and how they will protect remaining manufacturing jobs in Ontario", he said in a statement.