I just had this occur with my 2012 Chevy Silverado 1500 LT with less than 50,000 miles.
Because I bought the truck as a GM certified vehicle, the dealer covered the repair even though I was just slightly out of the warranty.
Good thing, the part alone (Wheel position Sensor) is $200.00. Add to that the diagnostic time as well as the labor to replace it and the repair would have cost between 400 and 500 dollars
getting the "service stabilitrak" message, while driving on the freeway. Took it to the dealer, and they said that it's the steering wheel position sensor. However, about the same time, my power steering seems to go out when i'm trying to park in small spaces...