The Canadian company will operate the plant as the "exclusive supplier" to "all the electric SUVs and trucks" produced at Orion Assembly, the project description said.
The GM assembly plant is undergoing a $4 billion electric conversion, and the Detroit-based automaker said last year it expected to churn out Chevrolet Silverado EVs and electric GMC Sierra pickups starting in 2024.
Construction of Magna's seating plant is expected to begin in July and be complete by November 2024.
The GM seating contract marks a big win for Magna. Southfield-based competitor Lear Corp. has been the seating supplier on GM's Silverado and GMC Sierra programs and announced a year ago that it won the contract for the 2024 Silverado EV being built at Factory Zero.
GM declined to say how it decided upon its seating suppliers.
"For competitive reasons, we do not publicly discuss details related to supplier agreements," GM spokesman Dan Flores told Crain's.
The development on the former site of Oakland County Animal Control is being led by Southfield-based General Development Co., which along with Farmington Hills-based Friedman Real Estate bought the property in 2021 for $3.7 million.
Once constructed, the building will be leased to Magna, though the lease has not yet been finalized, Fuerst said.
"The city council has had a long-standing strategic goal to prepare underutilized properties for redevelopment," according to the planning document. "The work involved with preparing this property is a prime example of the City Council's vision being implemented."
The planning document said the Magna plant will operate with three shifts—the first consisting of 250-300 employees—and operate five days a week, with work on the weekends based on GM's needs.