GM Canada completes federal order for 10 million face masks Since the start of production in May 2020, the team at Oshawa Operations produced approximately one million masks a month to help protect front-line workers and other Canadians during the COVID-19 pandemic. April 12, 2021 Canadian Plastics Employees from GM’s Oshawa Operations sign the 10 millionth mask milestone banner, after producing nearly one million masks per month since the mask line officially launched in May 2020. GM Canada has now fulfilled its commitment to the Government of Canada to produce 10 million face masks at cost for the Public Health Agency of Canada Photo Credit: Ann Power/GM Canada