As far as I know, the DRL system of Buick Light Blue 6 is designed to be unable to be shut down manually. Even if you turn them off within a driving cycle, they will still light up automatically the next time you start the vehicle.
Please note that the configuration of specific models and regions may be different. If you want more accurate information, I suggest you consult the owner's manual of Buick Micro Blue 6, or consult the local Buick dealer, who can provide accurate information and answers for your specific vehicle.