Department of Finance Canada announced reductions to the import remission quotas of General Motors and Stellantis.
The reductions are tied to Canada's auto tariff remission framework, which was implemented on April 15, 2025.
That framework allows automakers to import a set quantity of vehicles from the United States without Canadian counter-tariffs if specified Canadian production levels and investment commitments are maintained.
Finance Canada said General Motors had reduced production at its Oshawa and Ingersoll facilities and that Stellantis had cancelled production plans for the Brampton assembly plant.
Canada reduced General Motors' annual remission quota by 24.2 per cent and Stellantis' annual remission quota by 50 per cent.
The department said production levels are assessed quarterly against forecast production established before the tariffs were implemented.
Canada's auto sector supports about 125,000 direct jobs, 80 per cent of them in Ontario, and represents about 8 per cent of manufacturing GDP and 0.7 per cent of overall GDP.
In 2024, Canada produced about 1.3 million light-duty vehicles, of which about 1.1 million were exported to the United States.
The quota reductions are a tariff-policy tool. They affect automakers by reducing how much they can import under remission when Canadian production commitments are not met.