General Motors will eliminate two shifts at assembly plants that produce four of its passenger car models in January to shift production with lower demand for cars, the automaker has announced.

GM will also invest more than $900 million in a trio of production plants in Michigan, Ohio, and Indiana to support future vehicles.

The automaker will eliminate third shifts at Lansing Grand River, Mich., and Lordstown, Ohio. The Lansing plant produces the Cadillac ATS, Cadillac CTS, and Chevrolet Camaro. The third shift will end on Jan. 16 and will affect 810 hourly and 29 salaried employees. The plant now employs 2,700 people.

GM produces the Chevrolet Cruze sedans in Lordstown. That third shift will end Jan. 23 and will affect 1,202 hourly and 43 salaried employees. Current employment is at 4,500.

The $900 million set aside as an investment will go toward Toledo Transmission Operations in Ohio, Lansing Grand River, and Bedford Casting Operations in Indiana. GM will invest $667.6 million in Toledo, $211 million in Lansing, and $37 million in Bedford.