Sorry in advance for the long post, purchased my impala in January 2016 no issues. 6 months later in june I went on a vacation for a week and I came back and my car was completely dead. I decided this was my fault and I probably left something on. I then drove it for a few weeks and everything was fine. Went on another week long vacation this time having my friend start it every couple days. On the second day of my vacation he went to start it and it was again dead. This time I was sure to not leave anything on. Drove it for the next few months and it was ok. Now 12 months after purchasing the vehicle it is completely dead every 10 hours or so. I go to leave for work, dead, I leave work, dead. It has not died while driving yet. I have not done any recent mods to the vehicle and it has no aftermarket electronics except for I changed all the lights to LED immediately after I purchased the vehicle 12 months ago. The dealership tested the battery and said it was fine. I am wondering if anyone else has this issue or anyone has any guidance. I just cant believe this is happening as my car is fairly new. Thanks in advance.