GMC Terrain 2025 - Immobilizer; Immobilizer Operation

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-18552429) - 2025
22 Keys, Doors, and Windows
Disarming the Alarm System
T
o
disarm the alarm system or turn off the
alarm if it has been activated:
•
Press K on the remote key.
•
Unlock the vehicle using the Keyless
Access system.
•
Start the vehicle.
To avoid setting off the alarm by accident:
•
Lock the vehicle after all occupants have left
the vehicle and all doors are closed.
•
Always unlock adoor with the remote key
or use the Keyless Access system.
Unlocking the driver door with the mechanical
key will not disarm the system or turn off
the alarm.
How to Detect aTamper Condition
If K is pressed and the horn chirps and the
lights flash three times, the alarm was
activated while the alarm system was armed.
If the alarm system has been activated,
amessage will appear on the DIC.
Immobilizer
Se
e Radio Frequency Statement 3307.
Immobilizer Operation
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 remote key leaves the vehicle.
The immobilization system is disarmed when
the ignition is turned on or in ACC/ACCESSORY
and avalid remote key is in the vehicle.
The security light, in the instrument cluster,
co
mes on if there is aproblem with arming or
disarming the theft-deterrent system.
The system has one or more remote keys
matched to an immobilizer control unit in the
vehicle. Only acorrectly matched remote key
will start the vehicle. If the remote key is
ev
er damaged, you may not be able to start
the vehicle.
When trying to start the vehicle, the security
light may come 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 ignition will not change from off to on or
ACC/ACCESSORY, and the remote key appears
to be undamaged, try another remote key. Or,
you may try placing the remote key in the
cupholder in the center console. See Remote
Key Operation 37.
If the vehicle will not start with the other
remote key, or with the remote key in the
cupholder, the vehicle needs service. If the
vehicle does start, the first remote key may
be faulty. See your dealer who can service the
theft-deterrent system and have a new remote
key programmed to the vehicle.
It is possible for the immobilizer system to
learn new or replacement remote keys. Up to
eight remote keys can be programmed to the