(OSHAWA, Ontario) -- ......The company has since eliminated brand distinctions between engines, saddling them with names unlikely to inspire songwriters, like Ecotec, Vortec and Northstar. But some owners of the Chevrolet Equinox, a “compact” sport utility vehicle built in North America, might be surprised to learn the origin of the engine under their hoods — it’s made in China. Last year, China exported more than $12 billion in auto parts, up from less than $2 billion in 2002 — the majority to North America. The increase in exports has added to the problems plaguing North American suppliers. Most famously, Delphi,...