Three problems related to engine cooling system 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.
Engine oil leaks into the coolant system through the oil cooler located in under the intake manifold. The coolant will then turn into a thick substance which does not easily flow through the coolant system and the car engine will overheat. To correct the failure the oil cooler needs to be replaced as well as all rubber coolant lines and then the coolant system needs to be flushed to remove all contaminated coolant. Typical cost is around 4500 dollars for parts and labor. The mileage on my car was 121,000 when this happened but from reading on line many other people have had this same problem with mileage from 50,000 on up.
I've had numerous problems ever since I bought my 2003 Cadillac Cts. My engine starts smoking under the hood when I turn on my heater when it's cold outside. I replaced my brake lights several times. My windshield wiper module is broke. I had to get a new motor for my window because that broke. I had nothing but problems with this car and many other people have the same conditions as me. Why isn't it on recall ??? I mean we paid good money for it so we should get the same quality back !!! I know gm has to review our comments. They just don't care about there customers. Gm needs better customer service because there service sucks!!!! recall. . . . Recall. . . . Recall!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.
8/13/02 malformed fuel tank inlet hose replaced; 8/28/02 low coolant sensor internal failure, replaced coolant reservois and added coolant; 9/17/02 red fluid leaking from engine oil cooler. Resealed oil cooler and again filled cooling system; 10/8/02 now car must be cranked several times before engine starts. Car is a lemon. Dt.