Dias said he's not accepting the end of the Oshawa plant and that the company acknowledged in the meeting it would be possible to extend current production at the plant.
"We're going to continue to have discussions with them about solutions", Jerry Dias, national president of Unifor, the union that represents workers at the plant, said after meeting with GM officials at the No. 1 USA automaker's Detroit headquarters.
The company responded the suggestions were too expensive and would further deteriorate GM's competitive position. "Having completed an analysis of Unifor's proposals, GM has determined that it can not pursue them because they would not combat the declining economic and market factors that must be addressed".
"We understand our union's frustration but need to now work together to deliver supports, transition and training for our employees for new opportunities over the coming year".
"I'm deeply disappointed at the response of the corporation", Dias told a news conference in Windsor shortly after emerging from the meeting.
The decision would result in less than 200,000 GM vehicles built in Canada annually, yet GM expects Canadians to continue buying 300,000 vehicles per year, Dias said.
The closure would also cut Ontario's GDP by $5 billion and mean $330 million less provincial government revenue next year, and lead by 2030 to about a billion dollars less in combined provincial and federal revenues, the study estimates. A large rally is planned in Windsor on Friday.
GM said in a letter to Dias that it had already considered several proposals including those the union raised at the meeting.
While Unifor vowed it will not advocate for a boycott of GM products, the union leader believes Canadian vehicle buyers are already steering away following the Oshawa plant announcement. One of the plants is the Detroit Hamtramck Poletown plant set to close in July.
But Flavio Volpe, president of the Automotive Parts Manufacturers' Association, won't count out Unifor from getting some sort of deal.
Unifor got product allocated to Oshawa during the 2016 round of bargaining when many observers thought that was impossible, Volpe said. He noted that GM fulfilled its repayment obligations under the last bailout. "GM today has not only picked a fight with Unifor, but picked a fight with all of Canada".
The union is also considering its legal options, Dias said.
In Windsor on Tuesday, Dias blamed GM's decision on greed. "It goes down to a deeper question of, does a commercial entity have an obligation to community loyalty".