 In August 2010 , General Motors began a training program for first responders when performing rescue duties involving the Chevrolet Volt . The program began at the 2010 Fire @-@ Rescue International in Chicago , using a pre @-@ production Volt for a live extrication exercise . Chicago firefighters demonstrated the sequence of tasks required to safely disable the vehicle ’ s powertrain and its 12 @-@ volt electrical system , which controls its high @-@ voltage components , and then proceed to extricate injured occupants . As of January 2011 , additional training workshops had taken place in several other cities corresponding to the Volt 's initial launch markets . An Emergency Response Guide for the 2011 Volt was made available at its Service Technical College for use by emergency responders . The guide also describes methods of disabling the high voltage system and identifies cut zone information . 
