Vehicle Data Collection and EventData RecordersYour vehicle, like other modern motor vehicles, has anumber of sophisticated computer systems that monitorand control several aspects of the vehicle’s performance.Your vehicle uses on-board vehicle computers to monitoremission control components to optimize fuel economy,to monitor conditions for airbag deployment and, if soequipped, to provide anti-lock braking and to help thedriver control the vehicle in difficult driving situations.Some information may be stored during regularoperations to facilitate repair of detected malfunctions;other information is stored only in a crash event bycomputer systems, such as those commonly called eventdata recorders (EDR).In a crash event, computer systems, such as the AirbagSensing and Diagnostic Module (SDM) in your vehiclemay record information about the condition of the vehicleand how it was operated, such as data related toengine speed, brake application, throttle position, vehiclespeed, safety belt usage, airbag readiness, airbagperformance, and the severity of a collision. Thisinformation has been used to improve vehicle crashperformance and may be used to improve crashperformance of future vehicles and driving safety. Unlikethe data recorders on many airplanes, these on-boardsystems do not record sounds, such as conversation ofvehicle occupants.To read this information, special equipment is neededand access to the vehicle or the device that storesthe data is required. GM will not access informationabout a crash event or share it with others other than:• with the consent of the vehicle owner or, if thevehicle is leased, with the consent of the lessee,• in response to an official request of police or similargovernment office,• as part of GM’s defense of litigation through thediscovery process, or• as required by law.7-9
