Detroit Debates the Fate of GM's Hulking Former Headquarters / GM says it will cut production in Oshawa because of Trump tariffs, Unifor slams 'reckless' move / GM lowers 2025 guidance, citing up to $5 billion in tariff exposure / GM thanks Trump for the $5 billion tariff hit it expects to take / GM CEO Mary Barra says tariffs could cost it $5 billion this year / GM expects up to $5 billion tariff hit, even after recent relief / GM is nixing its profit forecast because of the 'significant' impact from tariffs / UBS downgrades GM, cuts Tesla price target as tariff pressure increases / GM’s UK design team imagines an electrified Corvette / Trump's auto tariffs hit stock market as GM, Ford fall while Tesla rises