I had the appointment today and they did update the software in it. According to the service manager the tech had a difficult time getting it to communicate so I was there longer than they thought I would be.
The before software was :84089010
The after software version now says: 84131949
They also updated the maps for me as well which was a nice surprise. That went from version 23346621 to version 84201676.
The performance of it seems a little improved. I still think my Silverado is quicker but as was pointed out here before it has better hardware than the Camaro does.
Overall I'm happy they did it.
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