I’m not sure when you purchased your vehicle, but when I purchased my vehicle Dec 2022 I had to do that OnStar setup crap as well and just denied giving them any information. They said I wouldn’t be able to get this or that but I didn’t care so they didn’t get that information. It took about 15 minutes with the person on the other side being a bit confused but just gave up when I said it the like 5th time.

Either way they don’t need that information at any time unless you want their free trials that are almost never worth it.