GM has decided to put an extended range electric drive Cadillac concept - the Converj - into production, according to reports in Detroit.

The Detroit News said that the car will use the same technology as that employed in the Chevrolet Volt.

The Cadillac Converj concept - which debuted at the 2009 Detroit Auto Show - was reportedly shown in a presentation made to GM's board in November 2 when the plan to take it into production was approved.

However, a production date has not yet been set, reports say.

"Cadillac needs as much excitement in its portfolio as possible, so I think it's a good strategy for them," Rebecca Lindland, an analyst with IHS Global Insight, told the Detroit News.

The Chevrolet Volt is scheduled for launch late in 2010; the Cadillac Converj could follow in 2012.