One problem related to anti-theft devices has been reported for the 2003 Cadillac CTS.
The contact owns a 2003 Cadillac Cts. The contact stated that the theft deterrent system was faulty and he was unable to remove the key from the ignition. While the vehicle was immobilized, the doors would lock independently and he was unable to enter or exit the vehicle. In addition, the alarm system would activate randomly and without warning. The vehicle was taken to a dealer where they replaced the battery as well as the power control module however, the failure continued to recur. The vehicle was awaiting an alternator repair. The manufacturer was notified of the failure. The current mileage was 85,000 and the failure mileages were 60,000.