What's at stake as 13,000 workers go on strike at major U.S. auto makers

About 13,000 auto workers have walked off the job at three targeted factories after their union leaders couldn't reach a deal with Detroit's automakers. The United Auto Workers union is seeking big raises and better benefits from General Motors, Ford and Stellantis.

About 13,000 auto workers have walked off the job at three targeted factories after their union leaders couldn't reach a deal with Detroit's automakers.

The United Auto Workers union is seeking big raises and better benefits from General Motors, Ford and Stellantis. They want to get back concessions that the workers made years ago, when the companies were in financial trouble.

A small percentage of the union's 146,000 members walked off the job at a GM assembly plant in Wentzville, Missouri; a Ford factory in Wayne, Michigan, near Detroit; and a Stellantis Jeep plant in Toledo, Ohio, at 11:59 p.m. Eastern time on Thursday.

Shawn Fain, the combative president of the UAW, says the targeted strikes will give the union leverage in contract talks and keep the auto companies guessing about its next move.

It could also make the union's $825 million strike fund last much longer.

Both sides began exchanging wage and benefit proposals last week. Though some incremental progress appears to have been made -- General Motors made a new, richer offer just hours before the strike deadline -- it was not enough to avoid walkouts. The strike could cause significant disruptions to auto production in the United States.

Here's a rundown of the issues standing in the way of new contract agreements and what consumers could face in a prolonged strike: