I know this post is a bit old but I just ran across it. So I did this tonight on our 2014 CTD and had no problems. It looks like the software in the file is from the 15-NA-081 update/campaign that GM put out in 2016. Wife had been complaining about her iPhone disconnecting from the head unit and not wanting to pair back up without removing it from the list and starting over. Apparently this software fixes that and some other issues. I don't have navigation.
List of fixes for this software from GMs TSB
List of fixes for this software from GMs TSB
If you don't have 84009432 Version E0.11.1F.40 in the Software Version Information screen, under Radio Settings, then you should be able to install this update. I just followed the directions included in the download. I also used a battery charger to keep the voltage up, I always recommend using one for any software updates in vehicles regardless of what is getting the update.