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Information like that is stored in the Sensing & Diagnostic Module (SDM), the new version of the DERM (Diagnostic Energy Reserve Module), and can be used in accident investigation.

Certain 1999 (and newer) model year GM vehicles have the added capability to record vehicle systems status data for a few seconds prior to an impact. Vehicle speed, engine RPM, throttle position, and brake switch on/off status are recorded for the five seconds preceding a deployment or near-deployment event. Almost all GM vehicles will add that capability over the next few years.
http://www.ntsb.gov/events/symp_rec/proceedings/authors/chidester.htm

SimplyRed said:
Also, nobody will be complaining if the shoe is on the other foot, to help you (in general not specific) out if someone hits you!!
Exactly!
 
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