stab system light came on today (failure) check 4wd

On my way to work yesterday (in the middle of a 16 mile commute), the Failure Stab system message came on. By the time I got to work the message was gone and hasn't come back since. I do remember shifting to 3rd gear about a minute before the message came up. Otherwise I haven't noticed anything strange before or after. Should I be concerned?

S.

H3 white/ebony, lux pkg, auto, XM, sunroof, hitch, chrome pkg, chrome wheels, chrome side steps, Hitchcam, RW chrome locking gas cap cover, etc.