GM Volt Warranty
FILE - In this Dec. 7, 2009 file photo, a pre-production Chevrolet Volt is driven at the General Motors Hamtramck Assembly plant during a news conference in Hamtramck, Mich. General Motors Co. is guaranteeing the battery in its Chevrolet Volt electric car for eight years or 100,000 miles in an effort to inspire confidence in the new technology Wednesday, July 14, 2010.(AP Photo/Carlos Osorio, file)
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