Wage talks between General Motors’ South Korean unit and its labor union ended without an agreement yesterday, a day before the deadline the company had set for filing for bankruptcy, Reuters reported. The Detroit carmaker had said that its loss-making South Korea unit was likely to file for bankruptcy protection if it failed to reach a restructuring agreement by today. GM said in February that it would shut down one of its plants in Korea, and it has been seeking wage concessions and government help to save its remaining three factories.