U.S. automakers are set to get a break on some of the sweeping tariffs President Donald Trump is imposing. Yet even with the new waivers, the outlook for America's longest-lived carmakers remains cloudy, with General Motors saying Tuesday it was "reassessing" its earnings guidance in light of the uncertainty over the tariffs impact.

President Donald Trump signed an executive order and a proclamation on Tuesday to​ ease auto tariffs, the latest abrupt shift in a rapidly changing tariff policy that has left businesses scrambling to keep up.

GM and Stellantis executives have expressed gratitude for the measures, which include rebates for vehicles finished domestically.