The transmitter may not communicate with the receiver if any of the following situations occurs:

Perform the synchronizing procedure if the transmitter does not communicate with the receiver. If the transmitter and/or receiver are replaced, preform the following programming procedure:

Important: It is not possible to program a remote transmitter without the Body Control Module (BCM) security code. The security code is contained on the Important Security Information Card issued with the vehicle when new.

1. Using the Tech 2, select Body / Programming / Program Remote Key and follow the instructions.
2. Enter the security code when prompted and follow the instructions.

1. Turn the ignition to ON, then wait 10 minutes for the next step in the programming sequence.
2. After the 10 minutes has elapsed, the car horn will chirp once. Turn the ignition switch to the OFF position within 5 minutes after the horn has sounded, then to the ON position within 5 seconds after switching it OFF.
3. Leave the key to the ON position for 10 minutes. After the 10 minutes has elapsed, the car horn will chirp twice. Turn the ignition switch to the OFF position within 5 minutes after the horn has sounded, then to the ON position within 5 seconds after switching it OFF.
4. Leave the key to the ON position for 10 minutes. After the 10 minutes has elapsed, the car horn will chirp 3 times.
5. Verify that the security indicator in the instrument cluster has stopped flashing and attempt to start the vehicle.
6. Turn the ignition to OFF and remove the key from the ignition switch.
7. Move approximately 3 meters (10 ft) away from the vehicle and test the transmitter functions to validate that the transmitter has been programmed successfully.