There are numerous glitches on these rigs - most of them are minor, but an annoyance nonetheless. The more options you have the more glitches you're likely to see. The one I've noticed on my base model SLE is that the dome light override switch won't stay off. We rarely use the dome lights and don't like them coming on when we get back home late and a few of the kids are asleep in their car seats. Despite turning the switch to off, there are times I'll open the door and the dome lights come on - I have to turn off the switch again. I believe the BCM goes into a "deep" sleep mode on these rigs and loses some of the user preferences - unintentionally. GM has issued a handful of OTA updates since we got our rig 7 months ago and they have TSBs out stating they are aware of some of these software issues, but a lot of them remain.
All that said, there's likely no way you or the dealer can fix this issue - it is what it is until GM issues an OTA update that properly fixes the glitch.