Chevrolet Metro 1999 Owner's Manual page 63

Power Door Locks (If Equipped)
This feature allows you to lock or unlock all of the side
doors at the same time. To lock the doors, push LOCK
and to unlock the doors, push UNLOCK.
If you open the driver's side door manually with the key
from the outside, only the driver's door will open. Then,
you must push UNLOCK to unlock the rest of the doors.
Rear Door Security Locks (4-Door Models)
Your vehicle is equipped with rear door security locks
that help prevent passengers from opening the rear doors
of your car from the inside.
To Use One of These Locks
The switch is located on the inside of the rear door. To
use the security locks:
1. Move the lever all the way down.
2. Close the door.
3. Do the same thing to the other rear door lock.
The rear doors of your vehicle cannot be opened from
inside when this feature is in use.
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