Chevrolet TrailBlazer Forum : “What could be the cause of the transfer case changing modes by itself?”

What could be the cause of the transfer case changing modes by itself?

The dash control physicaly stays in 2WD mode but the indicator lamp and the transfer case moves to Auto mode or 4WD mode.
This happens only after using a different mode such as 4WD. After a while (week or so)there is no more issues. When the problem appears the dashborad yellow transfer case warning light comes on with no codes thrown. GM dealer has no ideas...

Thanks !