GM Service Manual Online
For 1990-2009 cars only

The keyless entry system is a supplementary vehicle entry device. Radio frequency interference or discharged batteries may disable the system.

Keyless entry allows you to operate the following features:

    â€¢ The door locks
    â€¢ The rear compartment lid release--Press and release rear release button to activate.
    â€¢ The illuminated entry lamps
    â€¢ The panic alarm

The keyless entry system has the following main components:

    â€¢ The keyless entry transmitters
    â€¢ The body control module (BCM)
    â€¢ The remote control door lock receiver (RCDLR)--When a button is pressed on the transmitter, the transmitter sends an RF signal to the RCDLR. The RCDLR receives the signal and sends a serial data message requesting the appropriate function from the BCM.

Unlock Driver Door Only

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

    â€¢ Unlock the driver door only.
    â€¢ Illuminate the interior lamps for approximately 20 seconds or until the ignition is turned ON.
    â€¢ Flash the park lamps if the ignition is turned OFF and the doors are closed.

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:

    â€¢ Unlock all of the doors.
    â€¢ Illuminate the interior lamps for approximately 20 seconds or until the ignition is turned ON.

Lock All Doors

Press the LOCK button in order to perform the following functions:

    â€¢ Lock all of the doors.
    â€¢ Immediately turn OFF the interior lamps.
    â€¢ Flash the park lamps if the ignition is OFF and the doors are closed.
    â€¢ Chirp the horn if the ignition is OFF and the doors are closed.

Panic Alarm

The horn will sound 3 times and the headlamps and parking lamps will flash 3 times. Press and hold the button for 3 seconds to sound the panic alarm. The horn will sound and the headlamps and parking lamps will flash for 30 seconds. Press the button again to cancel the panic alarm.