General Motors Co plans next year to rehire 500 Michigan assembly plant workers who are to be laid off in May, citing increased demand for larger vehicles, the company said on Wednesday. GM said last week it planned to lay off 1,100 workers in May at its Lansing Delta Township assembly plant in Michigan. The company is moving production of the GMC Acadia mid-size SUV to Spring Hill, Tennessee, from the factory, which will build just two models, the Chevrolet Traverse and Buick Enclave SUVs. The company said that when it begins full production of the new versions of the two models in 2018, it would "bring back approximately 500 jobs to give the company flexibility to meet market demand." Last year, pickups and SUVs accounted for 59.5 percent of U.S. auto sales, up from 55.8 percent in 2015.