I'm going through the same issue with my four month old Caddy CTS........don't stand for that crap and whatever you do get to a COMPETENT dealer. Not all dealers are, believe me. My best guess IS that the battery is defective. Replace it yourself if the dealer won't. Something is causing a drain too I think, maybe a negative connection or possibly the BCM. It CAN be reprogrammed, believe me on that too. Get to a good dealer, it can make all the difference in the world. If all else fails PM me for a good Lemon Law firm.........the one that's now handling my case, won't cost you a thing.