The Canadian auto workers union is asking people in Canada and the U.S. to boycott General Motors vehicles made in Mexico.
The Unifor union is asking people not to buy trucks or SUVs with vehicle identification numbers that start with the number three, which signify that they are made in Mexico.
Unifor says it will publicize the boycott with television, newspaper and billboard advertising in both countries.
In November GM announced plans to close its car factory in Oshawa, Ontario, near Toronto, costing the jobs of about 2,600 blue-collar workers. It also has plans to close four U.S. factories but will negotiate those with the union. The closures are part of a broader restructuring that will cut 14,000 factory and salaried positions as GM tries to slim down to focus capital spending on autonomous and electric vehicles.
GM says it has too many plants that make cars as the market in both countries has shifted toward trucks and SUVs. It says the boycott could cause damage to the wider Ontario economy.