2012 Buick LaCrosse eAssist hybrid

Buick unveils the 2012 LaCrosse with eAssist,TM 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 system becomes the standard powertrain on LaCrosse starting next summer.

The system uses a state-of-the-art lithium-ion battery system and electric motor-generator to enable regenerative