The Delta Township GM plant builds the Chevy Traverse, Buick Enclave, and GMC Acadia. But all of that has stopped.
The last 32 days, workers have training for something new.
"Everyone needs to be certified on any new tooling. Any new job stations that are set up so that you are certified on your job" said GM's Lansing Communications, Erin Davis.
But when News 10 asked Davis what was the plant preparing for?
"I can't get into all of the specifics" Davis said. "It will all make sense later."
Since production of the 2017 GMC Acadia is moving to Spring Hill, Tennessee Delta had some extra room.
Now it has even more space, "this facility [general assembly] added a 28,000 square foot addition" Davis said at Thursday's unveiling to News 10.
General Motors has invested $583 million into the plant. $63 million for expansion and another $520 million for what it says could be vehicle programs.
"Some of this investment will be used as early as Monday," she said, "some will be used for future product."
The last two weeks the only people allowed in the plant have been team leaders. They have been making sure everything runs as smoothly as possible for employees' return.
"When everyone comes back to work next week, we have everything in place" Davis said. "All of the expanded areas with all of the new and latest equipment."
Davis tells News 10 that all of the updates were made to improve production at the plant and for better customer service.
"Everything that we do is to make sure the car is the highest quality car it can be so when the customer gets it they love the equipment they have" Davis said.
A month of improving all to ensure their customers come back.