I just got mine back this morning. I had service steering lock message and side detection unavailable. They say it’s a video module and it has to be ordered. Don’t know why those 2 are connected but they say that’s it. Will update after parts come in. Also did the emissions update to get rid of cel periodically coming on.
I was on a 1600 mile one way trip today and got the same check engine light...I was at 1650 on the odometer when it came on...OnStar ran diagnostics and told me to service at my convenience...it’s 20° where I’m at and would like to remote start...won’t be home until the 16th...I did get 20.5mpg over the 1630 miles...way better than my 19 power stroke