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Green Car Congress (www.greencarcongress.com) has great Chevrolet Impala news, photos, videos and more
The US Environmental Protection Agency (EPA) has certified NaturalDrive Partners, LLC’s dedicated compressed natural gas (CNG) retrofit of 2008 Chevrolet Impala sedans powered by 3.5-liter and 3.9-liter V6 engines in models LS, LT, LTZ, as well as law enforcement packages 9C1 and 9C3.