One problem related to headlights has been reported for the 2001 Cadillac STS. The most recently reported issues are listed below.
: the contact stated the driver side headlight was inoperable. The dealer tried to replace the ballast, but the wiring harness on the vehicle would not fit. No parts were available through the manufacturer or dealer to remedy the problem. The manufacturer is planning to manufacture a special part of their own design in order to remedy the problem. Updated 4/06/2006 -.