Get this data point: I just completed a 2400 mile round trip over 6 days (almost constant driving) and did not see a single "Service Stabilitrak" message pop up!
If that rear wheel speed sensor (or the hub) is suspect, how could it rotate that many times and not throw a single code??
2011 Equinox 1LT (new Jan 2011): Summit White / 3.0 L V6 / FWD / Pioneer Stereo / 18" Wheels / 138.2k miles [05-NOV-2019]
2002 Impala 1LT (new Jun 2002): Summit White / 3.4 L V6 / FWD / Cassette-CD Combo /225.5k miles [05-NOV-2019]