With last week’s reveal of the production version of the Chevy Volt comes a rumor GM will sell the Volt across the pond as an Opel. No, we’re not talking about a Segway-pooping Opel Flextreme, we’re actually talking about an Opel Volt. Our sources tell us to expect the 2011 Opel Volt to be mechanically identical to its Chevy sibling and share much of the overall exterior and interior styling.