The Chevrolet Volt is being reviewed by various outlets, with some focusing on specific model years such as 2013, 2014, 2015, 2016, and 2018. These reviews cover aspects like specs, prices, and photos, as well as gas mileage and overall performance. The range of model years being reviewed suggests that the Chevrolet Volt has undergone changes over time, but the exact nature of these changes is not clear.