Pontiac 2004 GTO - Manual (Page 69)

Remote Trunk Release
This feature is used to unlock the trunk from inside the
vehicle.
Push the button in the glovebox to unlock the trunk,
provided you are not traveling over 12 mph (20 km/h) or
the alarm system is on. Then from the outside, lift up
the trunk. For added vehicle security, the glovebox
button is disabled when all the doors are locked with the
LOCK button on the key or through the door lock.
There is also a secondary trunk release handle located
under the passenger’s side rear seat head restraint.
To access this handle, when the vehicle is not moving,
lift the head restraint and pull the yellow ring towards
the front of the vehicle.
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