2007 GMC Acadia Owner's Manual - Page 537

Event Data Recorders Some information about your vehicle's performance and how it is driven may be recorded on various modules if a crash occurs. Some people refer to these modules as event data recorders (EDRs). These modules may record several seconds of pre-crash and crash data, such as data related to engine speed, brake application, throttle position, vehicle speed, yaw rate, steering wheel angle, lateral acceleration, safety belt usage, airbag readiness, airbag performance and the severity of the collision. Unlike the flight data recorders on airplanes, these modules do not record sounds or conversations. To retrieve this data, special equipment and access to the vehicle or the module that stores the data are required. Certain data may also be sent to or retrieved by OnStar® (see below). GM will not access this information or share it with others except: with the consent of the vehicle owner or, if the vehicle is leased, with the consent of the lessee; in response to an official request of police or similar government office; as part of GM's defense of litigation through the discovery process; or, as required by law. Data that GM collects or receives may also be used for GM research needs or may be made available to others for research purposes, where a need is shown and the data is not tied to a specific vehicle or vehicle owner. Others may be able to retrieve this data if they have access to the vehicle and have the special equipment necessary to download the data. 537