Two problems related to car will not start have been reported for the 2003 Cadillac CTS. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Cadillac CTS based on all problems reported for the 2003 CTS.
The car will not start and I have to bypass the ignition with a jumper in the fusebox.
Low coolant message three times in my Cadillac Cts dic. Dealer found nothing wrong, but added antifreeze every time. Antifreeze under the car took to dealer, antifreeze leaking from oil cooler plate. Car would not start even after a jump. Needed new ignition relay and battery.