Buick LaCrosse: Battery Replacement - Remote Keyless Entry (RKE) System Operation - Keys and Locks - Keys, Doors, and Windows - Buick LaCrosse Owners ManualBuick LaCrosse: Battery Replacement

Replace the battery if the REPLACE BATTERY IN REMOTE KEY message displays in the DIC. See “REPLACE BATTERY IN REMOTE KEY” under Key and Lock Messages.

The battery is not rechargeable. To replace the battery:

1. Push the button on the transmitter to extend the key.

2. Remove the battery cover by prying it with a finger.

3. Remove the battery by pushing on the battery and sliding it toward the key blade.

4. Insert the new battery, positive side facing up. Push the battery down until it is held in place.

Replace with a CR2032 or equivalent battery.

5. Snap the battery cover back on to the transmitter.

    Starting the Vehicle with a Low Transmitter Battery
    If the transmitter battery is weak, the DIC may display NO REMOTE DETECTED when you try to start the vehicle. The REPLACE BATTERY IN REMOTE KEY message may also be displayed at this time. ...

    Remote Vehicle Start
    If available, this feature allows the engine to be started from outside the vehicle. The button will be on the RKE transmitter if the vehicle has remote start. Laws in some local communitie ...

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    To Enter Remote Start Mode
    Press and release the REMOTE START button on the RKE transmitter twice within five seconds. The parking lights will flash and the horn will chirp twice (if programmed). Then, the engine will ...