Buick 2001 Century Owner's Manual page 78

Mode 4:
D
-
Automatic all door lock when the transaxle is shifted
out of PARK (P).
D
Automatic driver's door only unlock when the
transaxle is shifted into PARK (P).
D
Automatic door relock when any door is unlocked,
opened and then all doors are again closed while the
vehicle is not in PARK (P) or NEUTRAL (N) and
the driver's foot is on the brake pedal.
When your vehicle was shipped from the factory, it was
programmed to Mode 3. The mode to which your
vehicle was programmed may have been changed since
it left the factory. To determine the programmable mode
to which your vehicle is programmed or to program
your vehicle to a different mode, do the following:
1. Turn the ignition key to RUN.
2. Close all of the doors.
3. Apply your regular brakes.
4. Press and hold the power door lock switch in the
lock position. While holding the door lock switch in
the lock position, move the shift lever out of and
back into PARK (P).
2-8
After an initial transaxle cycle, each additional cycle
will advance the operating mode by one, starting from
the current operating mode. During this procedure, the
automatic door lock and unlock functions will operate
as defined by each mode listed previously, providing
the driver with feedback of the current operating mode.
If cycled beyond Mode 4, the vehicle will enter
operating Mode 1. When the door lock switch is
released, the vehicle will remain in the most recent
operating mode.
Disconnecting the vehicle's battery for up to a year will
not change the programmed mode of the programmable
automatic power door locks.