Power Door Locks - Buick 2005 Rainier Owner's Manual

There are several ways to lock and unlock your vehicle.
You can use the remote keyless entry transmitter or
you can use your key to unlock your door from the
outside.
You can lock or unlock the door from the inside by
sliding the manual lever forward or rearward.
The manual lever on each door works only that
door's lock.
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Power Door Locks

Remove the ignition key and press the lock symbol to
lock all of the doors at once. To unlock the doors, press
the other side of the switch.
The power door lock
switches are located on
the driver's and front
passenger's armrests.