General Motors Co. will lay off more workers next month when it cuts the second shift at its Lansing Grand River assembly plant.

Up to 100 additional hourly employees could be let go when the shift is cut in January.  The Detroit automaker initially said 350 workers would be laid off.

GM is cutting the second shift at the Grand River plant because of slow sales this year of the Cadillac ATS and CTS luxury car lines made here.

GM says the layoffs will be temporary, and the shift will be restored when production of the next generation Chevrolet Camaro moves from Canada to the Grand River factory.