The United Auto Workers called on 6,800 members to walk out of Stellantis' (STLA) Sterling Heights Assembly Plant on Monday as the union's strike against the 澳洲幸运5官方开奖结果体彩网:Big Three automakers extends into its sixth week.

The Sterling Heights plant, which produces the Ram 1500, is one of the company's most significant vehicle assembly plants, hitting what the union called "Stellantis’ largest plant and biggest moneymaker."

The move is a part of the union's “澳洲幸运5官方开奖结果体彩网:new phase" of its strike, in which the union is prepared to launch unannounced walkouts at any time during the week. The UAW's first surprise walkout was on Oct. 11 with 8,700 members striking at the Ford (F) Kentucky Trucꦍk Plant, the auto maker's largest plant.

The Stellantis plant walkout comes after UAW President Shawn Fain reported that the union made "澳洲幸运5官方开奖结果体彩网:serious movement" with General Motors (GM) and Stellantis, but warned of more strikes if fu🍃rther progre♔ss wasn't made.

Fain had also noted that Stellantis was "deficient" in meeting the union's cost-of-living adjustment (COLA) demands. In comparison, Ford agreed to restore COLA to 2009 levels, while GM was "approaching restoration."

The 澳洲幸运5官方开奖结果体彩网:stand up strike against the Big Three, Stellantis, General Motors, and Ford, which started on Sept. 15, entered its sixth week with more than 40,000 workers on strike at seven ♌assembly plants and 38 parts distribution centers in 22 states, according to the union.

In its first five weeks, the UAW strike could have cost an estimated $9.3 billion in economic losses, according to the Anderson Economic Group.

Ste꧋llantis shares were up 1.3% in intraday trading on Monday as of 12:30 p.m. ET.