Are US Auto Companies in Trouble?

In a report made by Cnn it talk about U.S. auto sales on the slide. It also reported that companies such as Ford and GM are having to lower production of the autos they are making because of the decrease in sales. With these sales continuing to dimish what do you think will happen to U.S. auto companies? Also what do you think they can do to turn around the problem and maybe have a comeback?