I have a 2014 Volt that makes the usual 1-chirp or 2-chirps when I plug it in at night or at work. About a month ago, I plugged it in and it chirped 10 times. Just like the 1- or 2-chirps but it just kept on going. Then it charged completely normally and threw no codes or warnings. Now in the past few weeks it will do the 10-chirp thing IN THE NIGHT every now and then. Last night it did this twice. Again, no codes or warnings and it charged normally. I have searched the web but can't find any reference to this behavior. Has anyone else experienced this or have any idea what it is about? Neighbors may not find this too cool if it keeps it up. Thanks!