Geo 1995 Prizm Owner's Manual page 54

To
lock the door from the
inside, push down the
button on the door.
Power Door Locks (Option)
To
unlock the door, pull up on the button.
Push the power door lock switch on the driver's door to
lock or unlock all the doors at once.
Leaving Your Vehicle
If you are leaving the vehicle, take your key, open your
door and set the locks from inside. Then get out and
close the door.
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