Chevrolet Silverado: Vehicle Security / Immobilizer

See Radio Frequency Statement.

Immobilizer Operation

This vehicle has a passive theft-deterrent system.

The system does not have to be manually armed or disarmed.

The vehicle is automatically immobilized when the vehicle is turned off.

The system is automatically disarmed when the ignition is turned from off to on.

The security light, in the instrument cluster, comes on if there is a problem with arming or disarming the theft-deterrent system.

The system has one or more RKE transmitters matched to an immobilizer control unit in your vehicle. Only a correctly matched RKE transmitter will start the vehicle. If the transmitter is ever damaged, you may not be able to start your vehicle.

When trying to start the vehicle, the security light may come on briefly when the ignition is turned on. If the engine does not start and the security light stays on, there is a problem with the system. Turn the ignition off and try again.

If the vehicle will not change ignition modes (ACC/ACCESSORY, on, off), and the RKE transmitter appears to be undamaged, try another transmitter. Or, you may try placing the transmitter in the transmitter pocket located in the center console. See Remote Keyless Entry (RKE) System Operation (Key Access) or Remote Keyless Entry (RKE) System Operation (Keyless Access).

If the ignition mode will not change with the other transmitter or with the transmitter in the transmitter pocket, your vehicle needs service. If the ignition does change modes, the first transmitter may be faulty. See your dealer who can service the theft-deterrent system and have a new RKE transmitter programmed to the vehicle.

It is possible for the immobilizer system to learn new or replacement RKE transmitters. Up to eight transmitters can be programmed for the vehicle. To program additional transmitters, see "Programming Transmitters to the Vehicle" under Remote Keyless Entry (RKE) System Operation (Key Access) or Remote Keyless Entry (RKE) System Operation (Keyless Access)

Do not leave the transmitter or device that disarms or deactivates the vehicle theft system in the vehicle.

When equipped with a key, if the engine still does not start, and the key appears to be undamaged, try another ignition key. It may be necessary to check the fuse. See Fuses and Circuit Breakers.

If the engine still does not start with the other key, the vehicle needs service. If the vehicle does start, the first key may be faulty. See your dealer. It is possible for the immobilizer system to learn new or replacement keys. Up to eight keys can be programmed for the vehicle. To program additional keys, see Keys (Key Access) or Keys (Keyless Access). Do not leave the key or device that disarms or deactivates the vehicle theft system in the vehicle.

See your dealer to get a new key blank cut exactly as the ignition key that operates the system.