2004 Cadillac CTS radiator

If you are talking about getting the lines out of the radiator, it requires a special release tool. It is a split plastic sleeve that slides in the fitting and releases the retainer. It is under the kent-moore tool #J-44827, a tool vendor may be able to cross reference it to a trade #, I have never sought it aftermarket.

Thank you for the quick response, its exactly what i needed to know.