There is a TSB about this. TSB 06-11-11. It is a software issue in the dash cluster. The repair is to replace the cluster with one with the newer software. The processer in the dash cluster looses the signal from the Advanc-Trac module, because it shut down with the key being turned off. The dash cluster stays 'on' for a second longer causing the Check Advance Trac error. Not really and issue except the occasional Check Advance Trac error.