The Trump administration imposed a 25 percent tariffs on imported cars this month and has said it will impose a 25 percent duty on imported parts on Saturday. About half the cars that G.M. sells in the United States in a typical year are made abroad, mostly in Canada and Mexico.

General Motors said Monday it would withdraw guidance it had previously issued over its potential profits this year because of President Trump’s tariffs, which have sparked uncertainty in the auto sector as well as the broader economy.

General Motors reported a dip in first-quarter profits but topped estimates Tuesday as the automaker said it was reexamining its 2025 outlook in light of uncertainty over US tariffs.