Buick LaCrosse: Programming Transmitters to 
the Vehicle - Remote Keyless Entry (RKE) System Operation - Keys and Locks - Keys, Doors, and Windows - Buick LaCrosse Owners ManualBuick LaCrosse: Programming Transmitters to the Vehicle

Only RKE transmitters programmed to the vehicle will work. If a transmitter is lost or stolen, a replacement can be purchased and programmed through your dealer.

The vehicle can be reprogrammed so that lost or stolen transmitters no longer work. Any remaining transmitters will need to be reprogrammed. Each vehicle can have up to five transmitters matched to it.

    Keyless Trunk Opening
    Lift up on the touch pad located above the license plate to open the trunk if the RKE transmitter is within range. ...

    Programming with a Recognized Transmitter (Keyless Access Vehicles Only)
    A new transmitter can be programmed to the vehicle when there is one recognized transmitter. To program, the vehicle must be off and all of the transmitters, both currently recognized and new ...

    See also:

    Operating range
    Coupe shown Sedan similar The Intelligent Key functions can only be used when the Intelligent Key is within the specified operating range from the request switch 1 . When the Intelligent Key bat ...

    Key number plate
    Keep the plate in a safe place such as your wallet, not in the vehicle. In the event that a key (without a smart key system) or mechanical key (with a smart key system) is lost, a new key can be ...

    Compass display (if so equipped)
    This unit measures terrestrial magnetism and indicates the heading direction of the vehicle. With the ignition placed in the ON position, press the button as described in the charts below to act ...