Chevrolet announced stop/start technology will be standard on the 2015 Impala powered by the 2.5-liter ECOTEC engine. The GM brand said this addition improves the vehicle’s city fuel economy by nearly 5 percent, or one mile per gallon. For the 2015 model year, the Impala will be available with two powertrains, a standard 2.5-liter engine […]

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