If all you want to disable is the "event tracking/data collection" you can disable the "OnStar Smart Driver" feature from the MyChevrolet android app with your GM Canada account.
This "how to" assumes you already have a GM Canada account that knows about your cars and other personal details.
So, open the app, sign in, either by password or biometrics, then top right corner, tap the account icon (may contain your name/initials), then tap Settings, then OnStar Smart Driver, then disable "Allow OnStar Smart Driver" with the slider switch.
This can probably be done on the internet version, but I have yet to figure out how.