My Stabilitrac and traction control messages came back last night.. had not seen a single one since changing the front hub/bearing/sensors last weekend. The steering angle sensor is the next logical item (codes are intermittent and don't set any code that I can find). I know I am throwing some parts at it, but front hubs/bearings had some play (enough the wife noticed that the new ones no longer make the tires skip when backing up turning or swinging into a parking spot, so no concern there. The steering sensor is a bit of work (have to disconnect steering column and slit it to slide old sensor off, new one on). Ordered it from GM today, will take awhile to get (not like Amazon prime LOL).
I might try reading codes again this week or next, was not able to find anything last time with phone app or with laptop. I even borrowed a more sophisticated code reader from SIL that is mechanic. If I was really serious about getting the codes, I could stop by his work when his shift is ending (10:30pm) and he would read the codes (that is if the problem was present at that moment)..
Stay safe, prayers for those in need.