Service system stability message keeps coming up on the driver information display, the car (2001 STS) runs and drives fine. Any info or help would be appreciated.

Usually a bad steering wheel position sensor. The column has to be removed from the car for replacement.

check your OBD2 system for the code sounds like it could be a speed sensor on one of your hubs they r known to go on cadillacs i have replaced 2 hubs on my seville in 6 months

ITS A SENSOR PROBLEM--OR AS IN MY CASE THE SENSOR IN THE HUB(BEHIND THE DISC BRAKES). ITS EXPENSIVE, SO GO TO A MECHANIC YOU KNOW AND HAVE HIM GET YOU AND INSTALL THE PART. THE HUB IS APPROX $350-500 PLUS LABOUR.

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Well today i got my car back from the dealer. I took it in for the Service Stability Sytem message. The code i pulled from the car was ABS C1287. That turned out to be a bad steering wheel position sensor. They replaced it and all is now good. Part cost about $85 labor $100. Hope this helps a bit.

Mario
2002 STS 76000 miles