Cadillac XTS won't start, theft deterrent message and push start only clicks on Cadillac XTS

Some Cadillac XTS owners report experiencing starting issues, including a theft deterrent message and only hearing a click when using the push start. These problems may occur if the theft deterrent system has been activated, which can prevent the car from starting and may require resetting with factory software or a high-end scan tool. Additionally, cold weather conditions can impact the vehicle's functionality, leading to issues unrelated to the displayed message. The theft deterrent system can disable critical components like the fuel pump, ignition system, or starter if unauthorized access is detected, further complicating starting efforts. In some cases, owners find that manually disconnecting and reconnecting the battery multiple times can temporarily resolve the issue, although this workaround may need to be repeated each time the car is started. It is advisable for owners facing these issues to consider these factors and seek appropriate solutions.