General Motors plans to show a production model of its Chevrolet Volt extended-range electric vehicle as part of the automaker's upcoming 100-year anniversary celebration this month. The automaker, which formally celebrates the 100th anniversary Sept. 16, so far has shown only concept versions of the Volt.

"The rumors that a production version of the Volt will show up at the celebrations are true," a GM source told Automotive News Europe. "The car will be a true representation of what the production version looks like and be somewhat different from the concept versions."

The car will be shown to employees and media at GM headquarters in Detroit.

Source: Automotive News (subscription required)