The Canadian union, which represents about 4,300 workers at GM in these talks, said 80.5% of its members at facilities in Oshawa, St. Catharines and Woodstock voted in favor of the deal.
The deal with GM followed the pattern set with Ford Motor (F.N), which settled with Unifor last month.
In the United States, about 9,200 members of the United Auto Workers (UAW) union have affected two GM assembly plants and 18 parts distribution centers.
GM also has furloughed about 2,300 U.S. workers due to the impact of the UAW strike.
Unifor has used the "pattern bargaining" approach in its talks, reaching a deal first with Ford and then picking GM as the second bargaining target.
Persons:
Claude Robitaille, Unifor, Shivansh Tiwary, Nathan Gomes, Mrinmay Dey, Ben Klayman, Matthew Lewis, Diane Craft, Sandra Maler
Organizations:
Chevrolet Silverado, General, REUTERS, General Motors, Canadian, GM, Woodstock, Ford Motor, United Auto Workers, UAW, Ford, Chrysler, Thomson
Locations:
Oshawa, Oshawa , Ontario, Canada, United States, St, Catharines, Ingersoll , Ontario, Bengaluru