DETROIT -- For 2011, General Motors' return to electric-powered vehicles has been a sellout success, the U.S. automaker said Monday. GM said the production run for 2011 was set at 4,488 for the hybrid Chevrolet Volt and they've all been sold. Through June, GM had sold 3,071 Volts, while Nissan had sold 3,894 Leafs. GM, meanwhile, has increased its production schedule to 16,000 for 2011 and plans to make 60,000 in 2012. Eventually, GM plans to make 100,000 Volts per year.