Cadillac STS theft system won't disarm and indicator light remains on on Cadillac STS

Some Cadillac STS owners report experiencing difficulties with the theft system not disarming, resulting in the indicator light remaining on. These issues may be addressed by resetting the anti-theft system, which involves turning the key to the "On" position and waiting for about 10 minutes until the light turns off. Additionally, owners may find it helpful to check for trouble codes using an OBD-II scanner, as these codes can indicate specific problems with the anti-theft system. It is important to understand that the theft deterrent system in the Cadillac STS disables critical components like the fuel pump and ignition system if unauthorized access is detected. If the problem persists, seeking expert advice from a GM dealership or a qualified technician experienced in anti-theft systems is recommended.