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Most, if not all car companies collect and profile your data, how can I improve my privacy when buying a modern car?
(www.mozillafoundation.org)
Icon base by Lorc under CC BY 3.0 with modifications to add a gradient
In most vehicles with onstar (Chevrolet mainly) you can pretty easily disconnect the cable that connects the computers to the antenna. You need to install a dummy load to keep it from turning on the check engine light but other than that it’s trivial. Once that’s done, the car will still collect data but it can’t send it anywhere. Just don’t take the car to the dealership for maintenance or they might “fix” the antenna connection for you