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.
http://www.ntsb.gov/events/symp_rec/proceedings/authors/chidester.htmCertain 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.
Exactly!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!!