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 components:
| • | The rear compartment lid release |
| • | The illuminated entry lamps |
| • | The panic alarm (instant alarm) |
The keyless entry system has the following main components:
| • | The Body Control Module (BCM) |
| • | The Remote Door Lock Reciever (RCDLR) which was added midyear
to certain vehicles. |
When you press a button on a transmitter, on vehicles with ONLY a BCM,
the BCM recieves and interprets the signal and activates the requested function.
On vehicles with a RCDLR, the transmitter sends a signal to the RCDLR. The
RCDLR recieves the signal and sends a serial data message requesting the
appropriate function from the BCM.
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 10 seconds
or until the ignition is turned ON. |
| • | Flash the parklamps twice if the ignition is turned OFF and the
doors are closed. |
| • | Identify the driver to the radio. The radio will then revert to
the station presets, the last station, the last volume settings, and the last
playback mode used by that driver. |
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 all of the doors. |
| • | Illuminate the interior lamps for approximately 10 seconds
or until the ignition is turned ON. |
Lock All Doors
Press the LOCK button in order to perform the following functions:
| • | Immediately turn off the interior lamps. |
| • | Flash the parklamps twice if the ignition is OFF and the doors
are closed. |
| • | Chirp the horn if the ignition is OFF and the doors are closed
(if turned ON in personalization). |
Rear Compartment Lid Release
A single press of the rear compartment release button will open the
rear compartment lid under any of the following conditions:
| • | The ignition is turned OFF. |
| • | The park brake is engaged. |
| • | The vehicle speed is less than 2 mph (3 kph). |
The interior lamps will not illuminate.
Alarm
A single press of the panic button or an OnStar request performs the
following functions:
| • | Illuminates the interior lamps. |
| • | Flashes the headlamps and the parklamps for 2 minutes or
until one of the following conditions occurs: |
| - | The panic button is pressed again. |
| - | The ignition switch is turned to the RUN position with a valid
key. |
| - | An OnStar request to deactivate the panic function is received. |
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 body control module (BCM) or
the Remote Control Door Lock Reciever RCDLR are synchronized to the appropriate
order. If a programmed transmitter sends a signal that is not in the
order that the BCM or the RCDLR expects, the system will not function.
This occurs after 256 presses of any button on the transmitter when it
is out of range of the vehicle.
Automatic Synchronization
The keyless entry transmitters do not require a manual synchronization
procedure. If needed, the transmitters automatically resynchronize when any
button on the transmitter is pressed within range of the vehicle. The transmitter
will operate normally after the automatic synchronization.
