Two problems related to alternator/generator/regulator have 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.
Car purchased 10/16/2003 with 15200 mileage. Left rear door regulator failed. This door could not have been used in 9 years more than 20-25 times. Dealer, royal Cadillac, charged $694. 95 for replacement. I complained to Cadillac, requesting reimbursement, and they refused. Research indicates that door regulator failures on this make and model were well known and published many years ago. Given the little useage of this door (we are senior citizens and rarely have rear seat passenders) I believe this defect to exist at the time of purchase.
3 window regulators proven defective since owning 2003 Cadillac Deville. #1 drivers window on 9/17/08 done under warantee at 31,000 miles; #2 front passenger window done 11/13/10 @ 52,000 miles cost $356. 00 at dealer; #3 drivers side rear passenger window regulator on 6/8/11 @60,000 milesreplaced-cost $502. 00 contacted Cadillac customer service, received a case # and was told that since car is out of warantee there will be no reimbursement for repair costs. Several customer comments to Cadillac customer sevice by other owners of similar model and year have same problems and needed replacements of several regulators. Gov't agency should explore this problem and have Cadillac re-examine reimbursements for repairs of this problem with 2003 and 2004 Cadillac Devilles.