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KANSAS CITY, Kan. — Union workers at the General Motors Fairfax Assembly Plant are set to vote later this week on authorizing a strike after rejecting the latest contract offer from the automaker.

Workers with the United Auto Workers local 31 will vote on Thursday on whether to authorize a strike at the Kansas City, Kansas, plant – the largest manufacturing plant in the Kansas City metro area.

According to the UAW Local 31 website, 66 percent of production workers voted down the contract, as did 58 percent of skilled workers.

The vote comes at a key time for GM, as the plant produces the company’s second-best selling car – the Chevrolet Malibu. The Fairfax plant currently has three shifts dedicated to producing the Malibu, which is also produced at a plant near Detroit.

GM spends over $470 million each year on wages and benefits for workers in the Kansas City area, in addition to millions in property and other taxes.

Voting on whether or not to authorize the strike will begin at 5:00 a.m. on Thursday and conclude at midnight.