United Auto Workers union boss set to announce next moves in strike against Ford, GM, Stellantis

United Auto Workers President Sean Fain is set to deliver his weekly address to members via Facebook live on Friday at 2 p.m. ET, at which time he is expected to announce the union's next moves in its ongoing simultaneous strike against Ford, General Motors and Stellantis.

The union's strategy of striking at certain plants and incrementally adding more targets against any of Detroit's Big Three as negotiations continue comes with an element of surprise and is designed to put pressure against the automakers and play them against each other.

Since the strike began on Sept. 15 at one facility owned by each manufacturer, the UAW has expanded the strike twice, with Fain delivering the updates in his Friday video messages. GM was hit harder by the union both times while Ford was spared from the first escalation and Stellantis dodged the second.

Fain has vowed to increase strike targets at any automaker that is not making sufficient progress in contract talks from the UAW's perspective.

GM ESTIMATES $200M LOSS SINCE UAW STRIKE BEGAN

GM said Thursday it had delivered its sixth proposal to the UAW, marking its second offer this week after saying that "significant gaps remain" between the two sides as of Monday.

FORD WARNS EXTENDED UAW STRIKE COULD RESULT IN UP TO 500,000 SUPPLIER EMPLOYEE LAYOFFS

Sources told Reuters that progress was made this week in the UAW's negotiations with both Ford and Stellantis.

Currently, around 25,000 of the 150,000 UAW members employed by the Big Three are on strike, and the union has not ruled out expanding the strike nationwide if talks drag on.

GM said Thursday that the strike has cost the automaker around $200 million so far, and the company confirmed it secured a $6 billion line of credit the day before. Ford and Stellantis declined to provide estimates of losses when asked by FOX Business.

GET FOX BUSINESS ON THE GO BY CLICKING HERE

Data from Michigan economic consulting firm Anderson Economic Group show the UAW's strike against the Big Three cost the U.S. economy $3.95 billion in its first two weeks.

FOX Business' Joe Toppe and Reuters contributed to this report.