This species is the only known endemic Canadian plant to go extinct since the 16th century.
The Canadian plant, which employs 2,700 people and can make 600 locomotives a year, had been preparing for layoffs because of a decline in orders.
On July 31, production at the Canadian plant was cut to 49 heavy trucks a day from 54.
The French and Canadian plants have grown in order to improve and increase production capacity.
The engine foundry remained open to supply the Canadian plant until the end of the 1964 model year, after which it was also shuttered.
Seven Canadian plants were closed due to consolidation.
The arrangements guarantee that the 1,200 workers in the Canadian plants will keep their jobs until 1993.
G.M. also said it would shut down the Canadian plant that makes the cars.
About 80 percent of their Canadian plants' output, mostly larger cars, are sold in the United States.
Plasma is broken down into various components through a fractionation technique that Canadian plants are not able to do.