In this Dec. 21, 2006, file photo, an auto worker puts a wiring harness in an empty vehicle body during production of the General Motors’ Chevrolet Equinox, Pontiac Torrent and the Suzuki XL7 at the CAMI Automotive facility in Ingersoll, Ontario, Canada. , Dave Chidley/The Canadian Press via AP, File Turmoil in Canada’s two largest export sectors threatens to undermine the country’s so-far-so-good economic expansion. General Motors Co.’s announcement Monday that it plans to pull production from its plant in Oshawa, east of Toronto, raises concern about the auto industry’s viability in Canada. It came on the heels of an emerging crisis in the oil sector, which is struggling with plunging prices and transportation bottlenecks. Combined, the energy and automotive industries generate almost one quarter of Canadian export receipts. So their troubles are a reminder there are no guarantees the economy will be able to pull off a smooth transition to a business-led expansion as consumers begin to tap out. Third-quarter gross domestic product data is due out Friday. “The news that we’ve been seeing both in terms of the energy and the auto sectors gives a little bit more caution to the degree of that pickup in exports […]