 The Cadillac Converj is a plug @-@ in hybrid concept car first unveiled at the 2009 North American International Auto Show which incorporated the propulsion system from the Chevrolet Volt , including the Voltec powertrain . In August 2011 , General Motors announced its decision to produce the Converj as the Cadillac ELR . The first 2014 ELRs rolled off the production line in late May 2013 . These were pre @-@ production units destined for testing purposes and production for retail customers started at the end of 2013 . The ELR was released to retail customers in the U.S. in December 2013 . 
