Chevrolet 2003 Impala Owner's Manual page 78

Power Door Locks
A power door lock switch
is located on each front
door above the armrest.
Press the top of the switch to unlock all doors, or press
the bottom part of the switch to lock all doors.
The rear doors do not have power door lock switches.
The lever on each rear door works only that door's lock.
If your vehicle has the optional content theft-deterrent
system and it is armed, the power door lock switches will
be disabled. You must use your remote keyless entry
transmitter or your key to unlock the doors when
the system is armed.
Programmable Automatic Door
Locks
Programmable automatic power door locks are a
standard feature that is intended to provide enhanced
security and convenience by automatically locking
and unlocking doors.
Programmable Modes
Mode 1: No automatic door lock or unlock.
Mode 2: Automatic all-door lock when the transaxle is
shifted out of PARK (P); no automatic door unlock.
Mode 3: Automatic aii-door iock when the transaxie
is shifted out of PARK (P); automatic unlock for
the driver's door only when the transaxle is shifted
into PARK (P).
Mode 4: Automatic all-door lock when the transaxle is
shifted out of PARK (P); automatic all-door unlock
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Before your vehicle was shipped from the factory, it was
programmed to Mode 4. The mode to which the
vehicle was programmed may have been changed since
it left the factory. To determine the mode to which
to a different mode, see Vehicle Personalization
on
page 2-45.
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