1999 Buick LeSabre

1999 Keyless Entry Remote Fob

Important Notice: This programming process applies to vehicles manufactured in 1999 that include factory-installed keyless entry systems. The instructions below allow you to program remote fobs manually—no diagnostic tools are required. Please note that this guide is for remote fob programming only and does not include ignition or transponder key programming.

Programming Procedure:

  • Step 1: Sit in the driver’s seat and ensure that all vehicle doors are completely closed. Have all remote fobs you intend to program ready before beginning.
  • Step 2: Insert the key into the ignition. Leave it in the OFF position. Do not turn the key or start the engine at this point.
  • Step 3: Locate the Data Link Connector (DLC) under the driver’s side dashboard. The DLC is a rectangular port with a wider top—this orientation helps identify terminal positions.
  • Step 4: Identify terminals 8 and 4 on the connector. While the port may not be numbered, you can count pin positions using the shape of the connector. Ensure metal contacts are present in both terminals.
  • Step 5: Use a jumper wire to connect terminal 8 to terminal 4. Keep this wire in place for the entire programming session. Once the connection is made, the door locks will cycle (lock and unlock) to confirm that the system has entered programming mode.
  • Step 6: Recheck that all doors are closed to prevent disruption of the programming sequence.
  • Step 7: Turn the ignition key to the ON position—rotate the key forward one position without cranking the engine. The doors will automatically lock, confirming that the vehicle is now ready to accept remote signals.
  • Step 8: Take the first remote and press both the LOCK and UNLOCK buttons at the same time. Hold them for approximately 15 seconds. The door locks will cycle to indicate successful programming. Release the buttons after the locks respond.
  • Step 9: If you have additional remotes to program, repeat Step 8 for each one. You must perform this step for each remote within 60 seconds of programming the previous one.
  • Step 10: Once all remotes have been programmed, turn the ignition key back to the OFF position.
  • Step 11: Remove the jumper wire from terminals 8 and 4 of the diagnostic connector.
  • Step 12: Test each programmed remote to confirm that the lock and unlock functions work as expected.

Additional Considerations:

Remote Capacity: The system can usually store up to four remotes.

Battery Condition: Check that all remotes have fully functioning batteries before programming.

Not for Ignition Keys: This procedure will not program ignition or transponder keys.

Repeat if Needed: If any step fails or the locks do not respond, begin the procedure again from Step 1.