I have a 2000 Seville STS, yesterday I was on my way home from work and I heard two loud pops from the driver side floorboard. This morning on my way to work I got the message "service suspension sys". I checked the codes and there was only one code in current and it was RSS C0615 does anyone know what this code indicates?

 

Never mind, I figured it out. I checked on another forum and found the answer I needed. The suspension sensor link had popped off of the ball that is snaps onto. I attached it and all is well.

 

that's awesome that you found the solution to your problem, do you have pictures to see where that sensor is? I just got a 2000 Seville and I have the message:
"Speed limited to 90mph" which has to do with the suspension but I don't know what the problem is.