General Motors (GM) has lowered its 2025 earnings forecast, warning that new U.S. auto tariffs could cost the company $4-$5 billion. The updated guidance, released yesterday, comes two days after the company released its first-quarter results and withdrew its previous outlook, which didn’t take tariffs into account. It has also temporarily suspended the buyback of shares amid uncertainty. The move reflects rising pressure from global trade tensions, as Trump’s tariffs target foreign-built vehicles and parts ...