I have a 2000 Deville, and still no clue on why the Service Theft System warning appears on the info center display. I turn the car off and restart and then it's gone. I'd really appreciate if someone has information on this or has exprienced similar problems even with older or newer devilles. Thanks

 

The actual error coded would give more information. Can you get that?

 

I've only had the car about a month and it's done it about 3 times, but like I said it clears after I restart it. Maybe one day when it happens again I can have it scanned.