Other information:
If the vehicle is equipped with OnStar and has an active service plan, additional
data may be collected and transmitted through the OnStar system. This includes information
about the vehicle’s operation; collisions involving the vehicle; the use of the
vehicle and its features, including infotainment; and the location and approximate
GPS speed of the vehicle...
Adding non-dealer accessories or making modifications to the vehicle can affect
vehicle performance and safety, including such things as airbags, braking, stability,
ride and handling, emissions systems, aerodynamics, durability, and electronic systems
like antilock brakes, traction control, and stability control...