The communications box that Onstar uses to relay info from your car to their servers which collects data is behind the parking brake lever. It is silver in color. It is up in a reachable space, however it is behind a hard black plastic mount. You will need special tools to get to it. I haven't figured that out yet. However you can unplug the maroon (Onstar) plug which will disable the feature that allows you to call Onstar. The plug may also look purple or red and is next to a brown colored plug. If you want to disable Onstar diagnostics and tracking surveillance system (as I do) you will have to get the box out and remove the chip or board. A guy on youtube by the name of Lackoftobac and the name of his video is
Properly Disable OnStar 2014-2021 GM Vehicle
The video is good but in his vehicle the location is different (Behind the radio touch screen). In order for me to get the silver box containing the Onstar board out I have to figure out how to get is detached from the hard plastic cradle. Does anyone know how and what tools I need?
Properly Disable OnStar 2014-2021 GM Vehicle
The video is good but in his vehicle the location is different (Behind the radio touch screen). In order for me to get the silver box containing the Onstar board out I have to figure out how to get is detached from the hard plastic cradle. Does anyone know how and what tools I need?