One problem related to wiring has been reported for the 2003 Cadillac Deville. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Cadillac Deville based on all problems reported for the 2003 Deville.
Driver heated seat overheated causing burning smell. Actually burned the leather seat, no flame. Heated seat components all replaced as well a leather seat covers, seat & back.