Power Door Locks; Cargo Door Relocking - GMC 2003 Savana Owner's Manual

Power Door Locks

Press the bottom side of the power door lock switch to
lock all the doors at once. Press the top side of the
power door lock switch to unlock all the doors at once.
When a door is locked, the inside door handle will
not work.
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Cargo Door Relocking

This feature protects the owner from having an
unsecured side cargo door. If the side cargo door is
open when the lock button is pressed on the door or the
remote keyless entry transmitter, all doors will lock
and then re-lock again after the cargo door is closed.
If the cargo door is not closed within several minutes,
the re-lock will not occur.