I have a 2SS 50th with sunroof. I went through all of this with the dealer. According to GM it is not supposed to auto close.
The 2017 manual clearly changed from the 2016 manual adding the auto close feature. Despite that the button to close the sunroof is a tow position (or tow click) switch it does NOT auto close.
The argument about litigation is BS. My wife's 2015 equinox has auto close!!!
