One problem related to automatic transmission control module has been reported for the 1999 Cadillac Deville. The most recently reported issues are listed below.
Traction control illuminates off and on, indicating a malfunction within brake system, cause unknown. No problems have occurred with brakes. Consumer was concerned that light remained on, and that vehicle has been into dealer six times for same problem . Dealer could not identify the problem.
| Automatic Transmission problems | |
| Automatic Transmission Park/neutral Start Switch problems | |
| Transmission Gear Slipping problems | |
| Transmission Failure problems | |
| Automatic Transmission Control Module problems |