End of GM's Oshawa plant to be a $2.3B blow to Canadian supply industry End of GM's Oshawa plant to be a $2.3B blow to Canadian supply industry November 27, 2018 dzadmin Comments 0 Comment General Motors’ Oshawa Assembly Plant buys about $2.26 billion a year in auto parts and tools from Canadian suppliers, which in turn supports about 10,000 jobs, APMA President Flavio Volpe estimated.