How do you open the trunk of a Buick lucerne without the button or remote?

To open the trunk of a Buick Lucerne without the button or remote, you can use the physical key. Insert the key into the trunk lock located just above the license plate and turn it to unlock. If the lock is jammed or you don’t have the key, you may need to access the trunk through the rear seats by folding them down, if possible. Always refer to the vehicle’s manual for specific instructions related to your model.