A 2018 Ford Expedition goes through the assembly line at a Ford plant Oct. 27, in Louisville, Ky. Higher-profit SUVs and trucks are making up a larger share of auto sales, boosting the industry’s fortunes.

A 2018 Ford Expedition goes through the assembly line at a Ford plant Oct. 27, in Louisville, Ky. Higher-profit SUVs and trucks are making up a larger share of auto sales, boosting the industry’s fortunes.