Here are the codes and their causes:
C1281 Stabilitrak Sensors Uncorrelated
C1286 Steering/Lateral Accelerometer Sensor Bias Malfunction
C1287 Steering Sensor Rate Malfunction
Based on these, there is a problem with the steering sensor system. Are you having any trouble with drivability related to the steering?
As far as the rough idle at start up, if it isn't too bad and only last a few minutes, I would wait until it gets bad enough to set a code. Otherwise, you'll end up replacing parts that are good.
Let me know if you have any other questions.
Tuesday, November 18th, 2008 AT 7:35 PM