Unveiled at the 2009 Detroit Auto Show, the Cadillac Converj concept is perhaps General Motors most on-again, off-again vehicle in recent years. Based on the Chevrolet Volt, the Converj is a plug-in hybrid coupe with chiseled lines and a Wreath and Crest badge.

This production/non-production saga continues with Green Car Reports claiming "an inside source at General Motors" has confirmed the Converj is back on, meaning Cadillac is gearing up to launch the plug-in hybrid in 2013 or 2014. GCR's source says the production Converj – likely to end up with a three-letter model designation – will get a "generation 1.5 Voltec" propulsion system. If true, then the extended-range coupe will feature a slightly modified version of the powertrain that currently resides in all Chevy Volts.

We certainly have our doubts on this one, but there are two reasons to keep hope alive that the Converj will indeed make it to production. First, Green Car Reports told AutoblogGreen that the unnamed source, "has been completely on the money in the past." Second, a plug-in Cadillac makes more financial sense than a Chevy Volt. We'll wait for word from GM before we know if we should be waving hello or goodbye to the Converj this time around.

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