I left my interior lights on overnight and this morning the battery was dead and it would not start. The lights were still on dimly this morning when I noticed it. I thought the CTS has a power saving feature that would automatically cut power if the lights were left on? Is this a feature that needs to be manually turned on?
turn the ignition on, hit the setup button, and scroll through personalized options (same place as the memory seats and all that). see if there is a power save mode with a check box that isn't checked. if it would be anywhere, it would be there...