2010 Cadillac STS Owner's Manual - Page 124

Valet Lockout Switch The valet lockout switch is located inside the glove box. Immobilizer See Radio Frequency Statement on page 8‑18 for information regarding Part 15 of the Federal Communications Commission (FCC) Rules and RSS-210/211 of Industry and Science Canada. Immobilizer Operation The vehicle has a passive theft-deterrent system. The system is automatically armed when the ignition is turned off. The immobilization system is disarmed when the ignition is turned to OFF/ACCESSORY or START and a valid transmitter is found in the vehicle. 9 (Off) : Press to turn the lockout feature off and allow the trunk to be opened with either the keyless access transmitter or the trunk release button located on the driver's door. R (On) : Press to turn the lockout feature on. The trunk cannot be unlocked or opened. When the valet lockout feature is on, the remote start feature and the Universal Home Remote transmitter will be disabled Lock the glove box with the key to further secure the vehicle. See Keyless Access System Operation on page 3‑5 and Trunk on page 3‑15 for additional information. 3-24 You do not have to manually arm or disarm the system. The security light comes on if there is a problem with arming or disarming the theft-deterrent system. The system has one or more keyless access transmitters that are matched to an immobilizer control unit in the vehicle. Only a correctly matched keyless access transmitter starts the vehicle. The vehicle may not start if the keyless access transmitter is damaged. If the engine does not start and the security light comes on, there may be a problem with the immobilizer system. Press the START button again.