One problem related to ignition switch has been reported for the 2012 Chevrolet Volt. The most recently reported issues are listed below.
Driving on busy freeway when I accidentally bumped the start button on my Volt. The car shut off at 65 mph and when I realized what I had done I immediately pushed the button again which put the car in maintaince mode, leaving my wife and I to navigate to the right burm through several lanes of heavy high speed traffic, with no power. You have to have your foot on and depress the brake to restart. I managed to get to the burm safely. Others may not be so lucky. I reported this on the Volt website phone number and never heard anything. Do to gm's recent ignition switch recalls and resulting deaths. I feel it necessary to report this. I hope this letter my save lives. I lived through the Ford pinto cover up. I sold the car a few months ago.