I was driving on the highway 2 days ago and got a reading on my display stating my Stabilitrak was off and the engine needed servicing soon. After shutting off the engine and restarting (per the manual) the message was gone. However, today with my husband driving, the Stabilitrak light came on the display. Looking again in the manual for the actual sign, I came up with the same message - service soon. Has anyone else had trouble with the Stabilitrak? We were simply driving down a very straight (we're talking about Kansas here) road with obviously no major hills to speak of.