General Motors is joining Nissan, Honda, and other automakers in boosting incentives for its plug-in vehicles. The Chevrolet Volt has additional incentives to spur sales and lower stockpiles amid price cuts and lease deals on competitive models. GM is offering cash rebates from June 3 through July 1 of $4,000 on the 2013 Volt and [...]The Article Chevrolet Volt Joins Plug-in Competition with Increased Incentives appeared first on Automotive Digest.