"The strength of the labor market, better job security and the recovery in home prices have consumers feeling pretty good about the future, so we expect people will continue to replace their older cars and trucks," she said.
"The recent sharp drop in fuel prices and rising incomes should only add to their confidence."
She also cited a surge in young and first-time buyers, helped by the surge in jobs in the economy.
For GM, the country's largest automaker, sales will be strong in its small Chevrolet sedan and SUV models, including the Trax SUV, she said.
GM said the small SUV market will grow "more than 80 percent in the next few years."
GM is also expecting big returns from its new Colorado mid-sized pickup truck.
Copyright Agence France-Presse, 2015