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.

Keyless entry allows you to operate the following components:

    • The door locks
    • The illuminated entry lamps

The keyless entry system has the following main components:

    • The transmitters
    • The remote control door lock receiver (RCDLR)

When you press any button on a programmed keyless entry transmitter, the transmitter sends a signal to the RCDLR. The RCDLR performs the appropriate function.

Unlock Driver's Door Only

Momentarily press the UNLOCK button in order to perform the following functions:

    • Unlock the driver door only.
    • Illuminate the interior lamps for approximately 30 seconds or until the ignition is turned ON.

Unlock All Doors Second Operation

Momentarily press the UNLOCK button a second time within 5 seconds of the first press in order to perform the following functions:

    • Unlock the passenger door.
    • Illuminate the interior lamps for approximately 30 seconds or until the ignition is turned ON.

Lock All Doors

Momentarily press the LOCK button in order to perform the following functions:

    • Lock all of the doors.
    • Immediately turn off the interior lamps.

Lock All Doors Second Operation

Momentarily press the LOCK button a second time within 5 seconds of the first press in order to chirp the vehicle horns, if enabled.

Keyless Entry Personalization

The horn chirp may be personalized as part of remote activation verification. For mode descriptions and programming instructions, refer to Personalization Description and Operation in Personalization.

Rolling Code

The keyless entry system uses 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 RCDLR are synchronized to the appropriate order. If a programmed transmitter sends a signal that is not in the order that the RCDLR expects, then the transmitter is out of synchronization. This occurs after 256  presses of any transmitter button when it is out of range of the vehicle.