U.A.W. Strike Map: Where Auto Workers Are Walking Out

The United Automobile Workers union announced early Friday that a targeted strike had begun against all three Detroit automakers — General Motors, Ford Motor and Stellantis, the parent of Chrysler — as a deal was not reached before the current contract expired at 11:59 p.m. on Thursday.

The strike is expected to idle three plants in three states, with the potential to have a ripple effect through the automakers’ supply chain and factory towns in the Midwest.

The three plants represent only a small portion of the unionized factories of G.M., Ford and Stellantis across the United States, and less than 10 percent of those companies’ 150,000 U.A.W. members.

The union and the companies remain deadlocked over issues including pay, pensions, work hours and a tiered wage system.

The strikes are affecting plants owned by each of the three U.S. automakers — a change in tactics from previous U.A.W. strikes, which have typically targeted one company at a time.