How do you unlock the ignition on 2000 Cadillac DTS?

To unlock the ignition on a 2000 Cadillac DTS, ensure the vehicle is in the "Park" position. If the key won't turn, try gently wiggling the steering wheel while turning the key, as the steering lock can sometimes cause the ignition to jam. If the key still doesn't turn, it may be necessary to check the battery or ignition cylinder for issues. If problems persist, consult a professional locksmith or a dealership for assistance.