GM spokesman Tom Wickham told Mlive.com on Thursday that the Grand Blanc Weld Tool Center will cease operations in July. The plant is in Genesee County's Grand Blanc Township.
The plant employs 323 hourly and 28 salaried employees.
Wickham says the plant's employees will receive offers of jobs at GM's Flint Tool and Die plant and Warren Tech Center in Michigan and the Parma Metal Center in Ohio.
The center opened in 1942 and was used to produce tanks.