If your current employment involves building a sedan for a domestic automaker, there's both good and bad news awaiting you. General Motors is extending summer breaks at certain assembly plants and there may be an opportunity for some workers to extend that time off indefinitely, resulting in the least welcome vacations imaginable.

Stagnating sales and a bloated inventory is forcing GM to lengthen its traditional two-week summer shutdown to as many as five weeks for two U.S. factories, according to union officials. The affected plants are Lordstown Assembly, located in Ohio, and Kansas City's Fairfax Assembly. Lordstown assembles the Chevrolet Cruze while Fairfax is responsible for the midsize Malibu, which has had a horrendous 2017. The Malibu had plenty of company in the doldrums, too. Through May, U.S. car sales were down 11 percent while truck and SUV sales rose by nearly 5 percent, forcing automakers to play favorites.

Speaking to The Wall Street Journal, United Auto Workers Local 31 president Vicky Hale claimed the Kansas City plant could be idled for up to five weeks, with job cuts likely to follow. Robert Morales, president of the Lordstown union, said his factory will stop production for the last two weeks in June, followed by another three weeks in July.

"It's just to align with market demand, that's all," he explained on Wednesday.

After seven years of relatively consistent growth, overall demand for vehicles is slowing. Total U.S. deliveries are down 2 percent for May and industry analysts are suggesting 2017 won't surpass 17.2 million units. Any expectation of topping last year's record 17.5 million deliveries is now unrealistic - even if there are jobs depending on high sales volume.

The Lordstown plant, which saw a third shift cut at the beginning of the year due to lowered demand, employs roughly 3,000 workers. The Fairfax plant has about 3,500 workers. Hopefully, those numbers are unchanged after next month.