Buick 2010 Lacrosse - Manual (Page 21)

Keys, Doors and Windows 1-15
If the engine does not start and the
security light stays on there is a
problem with the system. Turn the
ignition off and try again.
If the engine still does not start, and
the key appears to be undamaged
or the light continues to stay on, try
another ignition key.
If the engine still does not start with
the other key, the vehicle needs
service. If the vehicle does start, the
first key may be damaged. See your
dealer/retailer who can service the
theft-deterrent system and have a
new key made.
Do not leave the key or device that
disarms or deactivates the theft
deterrent system in the vehicle.
Immobilizer Operation
(Keyless Access)
This vehicle has a passive
theft-deterrent system.
The system does not have to be
manually armed or disarmed.
The vehicle is automatically
immobilized when the transmitter
leaves the vehicle.
The immobilization system is
disarmed when the ignition button is
pushed in and a valid transmitter is
found in the vehicle.
The security light, located in the
instrument panel cluster, comes on
if there is a problem with arming or
disarming the theft-deterrent
system.
The system has one or more
transmitters that are matched to an
immobilizer control unit in your
vehicle. Only a correctly matched
transmitter will start the vehicle.
If the transmitter is ever damaged,
you may not be able to start your
vehicle.
When trying to start the vehicle, the
security light comes on briefly when
the ignition is turned on.
If the engine does not start and the
security light stays on there is a
problem with the system. Turn the
ignition off and try again.
If the keyless access transmitter
appears to be undamaged, try
another keyless access transmitter.
Or, you may try placing the
transmitter in the transmitter pocket
located in the center console. See
“No Remote Detected” under Key
and Lock Messages on page 4‑37.