2012 Buick LaCrosse eAssist  – Price,Photos,Features, specifications & Launch   Price   :    $ 30,820     Buick unveils the 2012 LaCrosse with eAssist,™ a new fuel-saving technology that increases fuel economy by 25 percent compared to the four-cylinder/six-speed powertrain in the 2011 LaCrosse.     The eAssist technology provides class-leading highway fuel economy of 37 [...]