Washington — The United States will levy 25% tariffs on imports of medium and heavy-duty trucks beginning Nov. 1, President Donald Trump announced in a Monday social media post .

The tariffs follow an investigation initiated in April by the U.S. Commerce Department about the national security effects of truck imports. The levies would be separate from import taxes on light-duty trucks, which have been in place for decades .

The White House did not immediately provide details on whether there would be exemptions for Mexico and Canada, where U.S. automakers have a sizable manufacturing footprint, or for countries like South Korea and Japan that recently reached trade deals with the United States.

If there are no carveouts for Mexico and Canada, General Motors Co. and Stellantis NV

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