General Motors, the largest producer of cars in Mexico, won’t provide details on how it would react if President Trump imposes 25 percent tariffs from the two countries.

Trump said in an Oval Office signing ceremony on Monday that his administration will impose a 25% tax on goods from Canada and Mexico that may come as soon as February 1 – a move that could raise prices for American consumers.

Trump has shown a willingness to move swiftly on tariffs in recent days without allowing for drawn-out talks. On Sunday, Trump announced—and then backed off—a threat to impose