I have a 2005 Buick Lacrosse and on the keyless remote the only thing that will open is the trunk and the panic button will go off.The doors won't lock or unlock.I replaced the battery with a new one.
Use this Procedure for Buick Vehicles "With" Driver Information Center Buttons.
This information is in your "Owners Manual" in the "Drivers Information Center Section."
1. Insert Key and turn to ON position so you can access Driver Information Center.
2. Press the vehicle information button until PRESS TO RELEARN REMOTE KEY displays.
3. Press the set/reset button until REMOTE KEY LEARNING ACTIVE displays.
4. Press and hold the lock and unlock buttons on the key-less remote at the same
time for approximately 15 seconds. A chime will sound indicating that the remote is
programmed.
5. To program additional remotes at this time repeat step 4. This vehicle can have a maximum of eight remotes programmed.
6. To exit programming mode turn key off and remove key. Test remote(s).
Use this Procedure for Buick Vehicles "Without" Drivers Information Center Buttons.
To access this display, the vehicle must be in Park (P) with key in the
on position (as far as you can go without cranking engine).
1. Press the trip odometer reset stem until RELEARN REMOTE KEY displays.
2. Press and hold the trip odometer reset stem for three seconds. The message REMOTE KEY LEARNING ACTIVE will display
3. Press and hold the lock and unlock buttons on the first key-less remote at the same
time for approximately 15 seconds. A chime will sound indicating that the remote is
programmed.
4. To program additional remotes at this time repeat step 3. This vehicle can have a maximum of eight remotes programmed.
5. To exit programming mode turn key off and remove key. Test remote(s).
Good Luck !
Aparrently you have to reset the remote, I have the same problem and a trying to figure out how to reset it.
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