Chevrolet 1998 Express Van Owner's Manual page 76

Power Door Locks (Option)
Press the bottom side of the
power door lock switch to
lock the doors at once.
When a door is locked, the inside door handle will
not work.
Child Security Locks
Child security locks are located on the passenger side
rear door, the side sliding door
or
the front portion
of
the
60/40
side swing-out door.
CHILD
SECURITY
LOCK
Printed
In
U.S.A.
Rear Cargo Door
With this feature, you can
lock these doors
so
they
can't be opened from the
inside by passengers.
Move the button down to
engage the security feature.
Move the button up to
return the door locks to
normal operation.
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