If your vehicle is equipped with StabiliTrak®,steering performance, including yaw rate, steeringwheel angle, and lateral acceleration, is alsorecorded. This information has been usedto improve vehicle crash performance and may beused to improve crash performance of futurevehicles and driving safety. Unlike the datarecorders on many airplanes, these on-boardsystems do not record sounds, such asconversation of vehicle occupants.To read this information, special equipment isneeded and access to the vehicle or the devicethat stores the data is required. GM will not accessinformation about a crash event or share it withothers other than:• with the consent of the vehicle owner or, if thevehicle is leased, with the consent of thelessee,• in response to an official request of police orsimilar government office,• as part of GM’s defense of litigation throughthe discovery process, or• as required by law.In addition, once GM collects or receives data,GM may:• use the data for GM research needs,• make it available for research whereappropriate confidentiality is to be maintainedand need is shown, or• share summary data which is not tied to aspecific vehicle with non-GM organizationsfor research purposes.Others, such as law enforcement, may haveaccess to the special equipment that can read theinformation if they have access to the vehicleor the device that stores the data.If your vehicle has OnStar® , please check theOnStar® subscription service agreement or manualfor information on its operations and datacollection.499