There may not be a guide, but I would think general rules are to avoid OnStar, navigation systems, cellular-to-WiFi, etc. I heard about the TPMS/RFID stuff. It

There may not be a guide, but I would think general rules are to avoid OnStar, navigation systems, cellular-to-WiFi, etc. I heard about the TPMS/RFID stuff. It seems like there is so much we just can't find out without manufacturers telling their secrets or tearing down our cars. Also, one thing I really want to know is what happens to all the data from frontal collision warning systems, rear view cameras, etc. I wish there was in-depth information about this what manufacturers do. I found an article but it is light on datails.[1] [1]https://www.washingtonpost.com/news/innovations/wp/2018/01/15/big-brother-on-wheels-why-your-car-company-may-know-more-about-you-than-your-spouse/ https://www.washingtonpost.com/news/innovations/wp/2018/01/1...