Chevrolet 2000 Cavalier Owner's Manual page 69

Power Door Locks (If Equipped)
Push the lower portion of the switch to lock the doors.
Push the upper portion of the switch to unlock the doors.
The lever on each rear door works only that door's lock.
It won't lock (or unlock) all of the doors
safety feature.
You can lock or unlock
all doors of your vehicle
from the driver's or
front passenger's
door lock switch.
--
that's a
Rear Door Security Lock (4-Door Models)
To Use One of These Locks
1. Use a key to move the lock all the way up.
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
the inside when this feature is in use.
Your vehicle is equipped
with rear door security
locks that help prevent
passengers from opening
the rear doors of your
vehicle from the inside.
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