General Motors Corp is rushing to finish the production version of its Chevy Volt and plans to unveil a showroom-ready model of the heavily touted electric car in September, people familiar with the project say.
A GM spokesman declined to comment on the timeline for its next announcements on the Volt, which will include naming a supplier for the vehicle's lithium-ion battery pack, the single most expensive element of the vehicle and the component seen as critical to its success.



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