General Motors’ Buick was on a roll. Sales for the once-stodgy brand were up 39% in the first quarter with a refreshed lineup of compact SUVs including the Envision, Encore GX, and the Envista, its top-selling SUV for under $30,000.

Then President Trump’s tariffs hit. Buick’s three most popular models are made outside the U.S. The Envista and Encore GX are both built in South Korea, while the Envision SUV is made in China. That means all three are now subject to stiff tariffs that could add thousands to sticker prices on dealer lots in the U.S.