2005 Cadillac STS Owner's Manual - Page 215

SERVICE STEERING SYS (System) Your vehicle may be equipped with a speed variable assist steering system. See Steering on page 4-11. The SERVICE STEERING SYS message will display if a problem is detected with the speed variable assist steering system. When this message is displayed, you may notice that the effort required to steer the vehicle increases or feels "heavier," but you will still be able to steer the vehicle. SERVICE THEFT SYSTEM This message will display when there is a problem with the hood open and closed switches. The switches may need to be replaced. When this message is displayed, the theft-deterrent system will still be protecting the interior of the vehicle, however, the hood area will not be protected at this time. Also, the remote start function will not work when this message appears. See your GM dealer for service. SERVICE SUSPENSION SYS (System) This message will display when the suspension system is not operating properly. Have your vehicle serviced by your GM dealer. SERVICE TRANSMISSION This message will display when there is a problem with the transmission of your vehicle. Have your vehicle serviced by your GM dealer. SERVICE TIRE MONITOR This message will display if the Tire Pressure Monitor (TPM) system, if equipped, is not working properly. Have your vehicle serviced by your GM dealer as soon as possible. SERVICE VEHICLE SOON This message will display when a non-emissions related malfunction occurs. Have your vehicle serviced by your GM dealer as soon as possible. SPEED LIMITED TO XXX This message will display when your vehicle speed is limited to XXX (mph in English mode and km/h in Metric mode) because the vehicle detects a problem in the suspension system. Have your vehicle serviced by your GM dealer. 3-83