Both Ford (F) and GM (GM) will throttle down the production of their muscle cars at their Michigan plants next week due to parts shortages.

Ford will shut down its Flat Rock Assembly Plant in Michigan, affecting the production of the Mustang, which it told Reuters was due to global chip shortages, while GM’s shutdowns will impact the Chevy Camaro at its Lansing Grand River assembly facility as well as the Cadillac CT4 and CT5.

GM told the news outlet that the production halt was not related to chips and did not give any indication as to what the plant disruption was about.

Both assembly plants are expected to be up and running again on April 11, Fox News reported.

Production of Stellantis’ Dodge Challenger muscle car was not reported to have any current production schedule interruptions at its Ontario, Canada, factory, according to Fox News.

The entire auto industry has been challenged by a semiconductor chip shortage during the COVID pandemic, which has forced temporary production shutdowns, delays, and some vehicles being produced without the coveted component.

In March, Ford cut production at its Kansas City assembly plant for its F-150 pickup trucks due to chip shortages, while GM said last week it was halting production for two weeks at an assembly plant in Fort Wayne, Indiana, for its Chevy Silverado 1500 and GMC Sierra 1500 pickup trucks, starting on Monday, also due to chip disruptions, Reuters said.

Automotive sales dipped 16% in the first quarter due to low inventory levels as automakers pulled back on production due to supply chain issues.

As of Monday at 12:10 p.m. ET, shares of Ford were trading at $16.66, up 1 cent, or 0.03%, while shares of GM were trading at $43.26, up 30 cents, or 0.69% at the same time.

2022 Ford Mustang Stealth Edition_01
2022 Ford Mustang Stealth Edition Appearance Package . Preproduction model shown. Available 1st quarter 2022 Ford