TORONTO (AP) — General Motors is planning to announce the closure of its Oshawa, Ontario, plant Monday, which will eventually result in the loss of about 2,500 jobs.

The plant closure announcement was confirmed late Sunday by an official familiar with the decision. The official spoke on condition of anonymity because they were not authorized to talk publicly ahead of Monday's announcement.

The official said it is part of a global restructuring of GM as it shift focus to lower emitting hybrid vehicles, which is not the focus of the Oshawa plant. GM has informed the Canadian government of the plan.

GM opened its factory in Oshawa, near Toronto, in 1953. The plant is used to make the Cadillac XTS and Chevrolet Impala sedans as well as the Chevrolet Silverado and GMC Sierra trucks.

A GM spokesman declined to comment. GM had been expected to close plants because of struggling sales.

10 PHOTOS General Motors plants around the world See Gallery General Motors plants around the world The GM logo is seen at the General Motors Assembly Plant in Ramos Arizpe, in Coahuila state, Mexico November 25, 2017. REUTERS/Daniel Becerril The employee parking lot of the General Motors Co (GM) CAMI assembly plant remains empty during a strike by the Unifor auto workers union in Ingersoll, Ontario, Canada October 13, 2017. REUTERS/Chris Helgren Workers inspect Baojun E100 all-electric battery cars at a final assembly plant operated by General Motors Co and its local joint-venture partners in Liuzhou, Guangxi Zhuang Autonomous Region, China, December 27, 2017. Picture taken December 27, 2017. REUTERS/Aly Song An employe of DHL company (yellow vest) works inside a Baojun car final assembly plant operated by General Motors Co. and its local joint-venture partners in Liuzhou, Guangxi Zhuang Autonomous Region, China, December 27, 2017. Picture taken December 27, 2017. REUTERS/Aly Song A worker driving a GMC Terrain leaves the General Motors CAMI car assembly plant where the GMC Terrain and Chevrolet Equinox are built, in Ingersoll, Ontario, Canada, January 27, 2017. REUTERS/Geoff Robins Workers assemble Chevy Bolt EV cars at the General Motors assembly plant in Orion Township, Michigan, U.S. November 4, 2016. REUTERS/Joe White Employees inspect vehicle frames in the weld shop at the SAIC-GM-Wuling Automobile Co. Baojun Base plant, a joint venture between SAIC Motor Corp., General Motors Co. and Liuzhou Wuling Automobile Industry Co., in Liuzhou, Guangxi province, China, on Wednesday, May 23, 2018. GM and its partners sold 4 million vehicles in China in 2017, about 1 million more than the automaker sold in the U.S. Photographer: Qilai Shen/Bloomberg via Getty Images An employee walks past vehicles in the general assembly shop at the SAIC-GM-Wuling Automobile Co. Baojun Base plant, a joint venture between SAIC Motor Corp., General Motors Co. and Liuzhou Wuling Automobile Industry Co., in Liuzhou, Guangxi province, China, on Wednesday, May 23, 2018. GM and its partners sold 4 million vehicles in China in 2017, about 1 million more than the automaker sold in the U.S. Photographer: Qilai Shen/Bloomberg via Getty Images Robotic arms weld vehicle frames in the weld shop at the SAIC-GM-Wuling Automobile Co. Baojun Base plant, a joint venture between SAIC Motor Corp., General Motors Co. and Liuzhou Wuling Automobile Industry Co., in Liuzhou, Guangxi province, China, on Wednesday, May 23, 2018. GM and its partners sold 4 million vehicles in China in 2017, about 1 million more than the automaker sold in the U.S. Photographer: Qilai Shen/Bloomberg via Getty Images A Chevrolet Sonic vehicle moves along the production line at the General Motors Co. Orion Assembly Plant in Orion Township, Michigan, U.S., on Tuesday, June 13, 2017. The largest U.S. automaker will expand its fleet of autonomous Chevrolet Bolts to 180 of the electric vehicles, Chief Executive Officerï¿½Mary Barraï¿½said Tuesday.ï¿½Photographer: Jeff Kowalsky/Bloomberg via Getty Images Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

Unifor, Canada's largest private sector union, said in a statement that it does not have complete details of Monday's announcement, but it has been informed that there is no product allocated to the Oshawa plant past December 2019.

"Based on commitments made during 2016 contract negotiations, Unifor does not accept this announcement and is immediately calling on GM to live up to the spirit of that agreement," the union said in a statement on its website.

"Unifor is scheduled to hold a discussion with General Motors (Monday) and will provide further comment following the meeting."

Oshawa Mayor John Henry said he had not spoken to anyone from GM. Jennifer French, who represents Oshawa in the provincial legislature, said she finds the news "gravely concerning."

"If GM Canada is indeed turning its back on 100 years of industry and community — abandoning workers and families in Oshawa — then this is a callous decision that must be fought," she said in a statement.

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