Immobilizer Operation
Your vehicle may have a passive theft-deterrent system.
The immobilizer system prevents your vehicle from
being started by unauthorized persons.
If your vehicle has an immobilizer system, your vehicle
has a special key that works with the theft-deterrent
system. There is a transponder in the key head that is
electronically coded. The correct key will start the
vehicle. An invalid key immobilizes the engine. The
immobilizer system isolates the power supply to
the ignition system, the fuel pump and the fuel injectors.
The engine immobilizer is activated after the ignition
is turned to LOCK and the key is removed from
the ignition. The security light located on the top center
of the instrument panel, near the windshield, will
flash when the immobilizer is active. If the light does not
flash after removing the key, have the system checked
by your dealer.
The immobilizer system works when you turn the key to
START. If the immobilizer system does not recognize the
electronic code, the engine will not start and the security
indicator will continue blinking. If your key is ever
damaged, you may not be able to start your vehicle.
When trying to start the vehicle, if the engine does not
start and the security light continues flashing, the
key may have a damaged transponder. Turn the ignition
off and try again.
If the engine still does not start, and the key appears to
be undamaged, try another key. At this time, you
may also want to check the fuse. See Fuses and Circuit
Breakers on page 5-77. If the engine still does not
start with the other key, your vehicle needs service. If
your vehicle does start, the first key may be faulty. See
your dealer who can service the theft-deterrent
system to have a new key made.
Up to four keys may be programmed for the vehicle.
If you lose or damage your keys, only a GM dealer can
service the theft-deterrent system to have new
keys made.
If you are ever driving and the security light comes on
and stays on, you will be able to restart your engine
if you turn it off. The theft-deterrent system, however, is
not working properly and must be serviced by your
dealer. Your vehicle is not protected by the
theft-deterrent system at this time.
In an emergency, contact Chevrolet Roadside
Assistance. See Roadside Assistance Program
on page 7-5.
2-16
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