overheating on 1999 Cadillac DeVille

replaced radiator, thermastat, overflow tank, waterpump, still overheating, someone suggested the coolant temp switch or the sensor.

Asked by for the 1999 Cadillac DeVille
2 answers
change the moter or clean all the hole for coolent to go throe
Check the radiator, I did all that and then turns out that the radiator was clogged.