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Vehicle Data Collection and Event
Data Recorders
Your vehicle, like other modern motor vehicles, has
a number of sophisticated computer systems that
monitor and control several aspects of the vehicle’s
performance. Your vehicle uses on-board vehicle
computers to monitor emission control components
to optimize fuel economy, to monitor conditions for
airbag deployment and, if so equipped, to provide
anti-lock braking and to help the driver control the
vehicle in difficult driving situations. Some
information may be stored during regular operations
to facilitate repair of detected malfunctions; other
information is stored only in a crash event by
computer systems, such as those commonly called
Event Data Recorders (EDR).
In a crash event, computer systems, such as the
airbag Sensing and Diagnostic Module (SDM)
in your vehicle may record information about
the condition of the vehicle and how it was
operated, such as data related to engine speed,
brake application, throttle position, vehicle
speed, safety belt usage, airbag readiness, airbag
performance, and the severity of a collision.
If your vehicle is equipped with StabiliTrak
®
,
steering performance, including yaw rate, steering
wheel angle, and lateral acceleration, is also
recorded. This information has been used
to improve vehicle crash performance and may
be used to improve crash performance of
future vehicles and driving safety. Unlike the data
recorders on many airplanes, these on-board
systems do not record sounds, such as
conversation of vehicle occupants.
To read this information, special equipment is
needed and access to the vehicle or the device
that stores the data is required. GM will not access
information about a crash event or share it with
others other than:
• 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.
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