One problem related to alternator/generator/regulator has been reported for the 2004 Cadillac CTS. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Cadillac CTS based on all problems reported for the 2004 CTS.
My Cadillac Cts 2004 key is stuck in the ignition and will not release. The car was towed to two different dealerships one said it was a battery. I purchased a new one that wasn't the problem and one thought it was the alternator and that wasn't the problem. I did have a recall on the key ring and got that taken care of, but honestly the same recall that is dealing with the camaros and the cobalts need to be enforced with the Cadillacs. Gm new there was something faulty about the keys getting stuck in the Cadillacs. I've been on several forums and we all have the same problem!.