97-05 Buick Century Programming

2005 Buick Century Vehicle Fob

IMPORTANT: Before entering programming mode, have in possession all of
the remotes you will be using on the vehicle. Once you program the remotes ,
all previous codes will be erased from the memory. The other remotes will not
be functional until you program the remotes again.

  1. Close the vehicle doors.
  2. Insert key in ignition and turn to ON (As far as you can without cranking engine)
  3. Turn ignition OFF and remove the key from the ignition.
  4. Press and hold the driver side door lock switch in the UNLOCK position.
  5. Insert the ignition key into the ignition lock cylinder and remove the key.
    (Do not turn the ignition key in the lock cylinder.)
  6. Insert the ignition key into the ignition lock cylinder and remove the key.
    (Do not turn the ignition key in the lock cylinder.)
  7. Insert the ignition key into the ignition lock cylinder.
    (Do not turn the ignition key in the lock cylinder.) Leave the ignition key
    in the ignition lock cylinder.
  8. Release the door lock switch. The vehicle will sound three beeps in order
    to verify the Program Mode has been activated.
  9. Press the LOCK and UNLOCK buttons together on the keyless entry
    transmitter and hold until the vehicle beeps twice to verify that the
    transmitter has been successfully programmed (this take approximately
    15 seconds).
  10. Perform the previous step to program up to four transmitters (including your
    old ones).
  11. Remove the ignition key in order to exit the Program Mode.

 

For 1999 models in which the above procedure is uncussefull try the procedure below

 

  1. Sit on the driver’s seat
  2. Remove the ignition key from the ignition lock cylinder
  3. Close all the doors
  4. Press and hold unlock on the door lock switch (on the door)
  5. While holding the door lock switch in the unlock position, insert and
    remove the ignition key TWICE. DO NOT TURN THE KEY IN THE LOCK
    CYLINDER … JUST SLIDE IT IN AND BACK OUT.
  6. Insert the ignition key the third time, leaving the key in the ignition
    cylinder. DO NOT TURN KEY
  7. Release the door lock switch. You will hear 3 chimes indicating the
    transmitter programming is active.
  8. Press and hold the lock and unlock buttons on the keyless entry remote
    at the same time for 12 seconds. You will hear two chimes.
    This indicates the transmitter has been programmed.
  9. Repeat step (8) for all additional transmitters to be programmed
  10. Exit programming by removing the key from the ignition cylinder