General Motors plans to announce Thursday that it will build a compact-sized Cadillac at its Grand River assembly plant in Lansing. Mayor Virg Bernero's office issued a statement today saying the plant will produce the new Cadillac ATS. According to reports, the automaker will make a $190 million investment that will create more than 600 jobs. GM CEO Daniel Akerson will make the announcement at the plant, joined by Governor Granholm, United Auto Workers President Bob King and three members of Michigan’s congressional delegation. The $707 million, 2.5 million-square-foot Grand River factory was built in 2001 and employs 1,133 workers. The plant makes the Cadillac CTS line - including sedan, coupe and wagon versions - and the STS sedan. (MRN)