In ongoing negotiations with Mexico and Canada, the Trump administration is seeking to ensure that more vehicles are made in America, among other changes. But Jim Lentz, Toyota's North American CEO, says ending the agreement would likely raise costs. That, in turn, would raise vehicle prices and cut demand, forcing manufacturing layoffs. It also would make the U.S. less competitive than the world's other manufacturing centers, he said. Ending the agreement also could force some suppliers to stop making parts.

Fiat Chrysler's Ram also got big updates, losing more than 200 pounds and giving it a gas-electric hybrid engine option. Both the Silverado and Ram were given more athletic stances and meaner looks. Ford added a diesel engine to its F-150 and rolled out the midsize Ranger. Automakers turn big profits on large pickups. Sales rose nearly 6 percent last year to almost 2.4 million, even though total U.S. auto sales dropped 2 percent.

In ongoing negotiations with Mexico and Canada, the Trump administration is seeking to ensure that more vehicles are made in America, among other changes. But Jim Lentz, Toyota's North American CEO, says ending the agreement would likely raise costs. That, in turn, would raise vehicle prices and cut demand, forcing manufacturing layoffs. It also would make the U.S. less competitive than the world's other manufacturing centers, he said. Ending the agreement also could force some suppliers to stop making parts. Charlie Chesbrough, the chief economist for Cox Automotive, said it's hard to imagine there will be much change in production, because automakers need a long lead time to act and they know the next president could reverse Trump's actions.