Chevrolet Optra 2004 Owner's Manual page 76

To manually unlock the doors from the outside, insert
the key and turn it toward the front of the vehicle.
To manually lock the doors from the outside, insert the
key and turn it toward the rear of the vehicle.
The driver's door lock cannot be pushed in while the
door is open. Upon leaving the vehicle, the driver's door
can only be locked from the outside by using the key
or the optional remote keyless entry transmitter.
2-8
All doors, except for the
driver's door, can be
locked from the outside
by pushing down the
manual door lock and
then closing the door.
If your vehicle has a security indicator, the indicator will
turn off when you unlock the door using the key or
the optional keyless entry transmitter. The indicator will
turn on when you lock the door using the key or the
keyless entry transmitter. The security indicator is
located on the base of the driver's door lock.
From the inside, you can lock and unlock all of the
doors by pushing or pulling the manual door lock located
on the window sill on each door. You can also lock
and unlock the doors with the optional power door lock
switches located on the driver's door trim pad.
Central Door Unlocking System
Your vehicle may have a central door unlocking system.
The central door unlocking system is activated from
the driver's door.
From the outside, you can lock or unlock all of the
doors on your vehicle from the driver's door by using
either the key or the optional keyless entry transmitter.
From the inside, you can lock or unlock all of the
doors using the driver's door lock.