GM Service Manual Online
For 1990-2009 cars only

The keyless entry system is a supplementary vehicle entry device. Use the keyless entry system in conjunction with a door lock key. Radio frequencies or discharged batteries may disable the system. Therefore, always carry a door lock key.

Keyless entry allows you to operate the following components:

    • The door locks
    • The rear compartment lid release
    • The illuminated entry lamps (if equipped)
    • The panic alarm (instant alarm)

Rolling Code

The keyless entry system uses a rolling code technology. Rolling code technology prevents anyone from recording the message sent from the transmitter and using the message in order to gain entry to the vehicle. The term "rolling code" refers to the way that the keyless entry system sends and receives the signals. The transmitter sends the signal in a different order each time. The transmitter and the RFA module are synchronized to the appropriate order. When the transmitter sends a signal that is not in the order that the RFA module expects, then only the panic button will function.