2003 Cadillac Deville

You were not specific enough in telling me right or left, inside or outside, I will assume lift side outside:
1. The original OEM door handle P/N 25749397, is $74.08
2. The original OEM door lock cylinder P/N 899022356, is $84.48 Uncoded
3. Labor on the door handle is 1.0hr. Labor on the lock cylinder is 0.8hr according to the labor book, if you are going to take it to the dealer, it is going to cost you about $500 parts and labor.