One problem related to alternator/generator/regulator has been reported for the 1999 Cadillac STS. The most recently reported issues are listed below.
On 11/27/00 car leased from chevy dealer and onstar put on by Cadillac dealer. On 01/08/01 car dead in drive,Cadillac dealer installed new battery. On 10/01/01 car quit while driving, Cadillac dealer installed new generator. On 7/18/02 car dead in drive,chevy dealer replaced generator. On 9/13/04 car dead in drive ,chevy dealer found nothing. On 11/18/04 car dead in doctor's lot,chevy dealer found nothing and sent it to Cadillac dealer who also found nothing. Two days later car dead in store lot. Sent back to Cadillac dealer who installed generator and battery. On 8/31/05 car stalled after being picked up from chevy dealer, returned to chevy dealer who found nothing. Sent to Cadillac dealer who replaced some computers. Chevy dealer picked car up and drive 9 miles before car quit. Returned to Cadillac dealer who replaced ignition switch. Returned to me. Five(5) days later car dead in drive and returned to Cadillac dealer. Cadillac dealer disconnected onstar and said try it.
| Electrical System problems | |
| Alternator/generator/regulator problems | |
| Battery problems |