The steering wheel position sensor may fail, resulting in the service stability message being displayed.Google+
Car Problem Reports
Cadillac Escalade EXT Steering Wheel Position Sensor May Fail
Cadillac Escalade EXT Problem
Average Mileage: 106,666 mi (95,000 mi - 115,000 mi)
Visitor, 2002 Cadillac Escalade EXT, 95,000 mi
Service Stability System light came on,but the truck was running fine.Took it into the dealer since I had just purchased it a few months back and they replaced the sterring wheel position sensor.