One problem related to automatic transmission control module has been reported for the 2004 Cadillac CTS. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Cadillac CTS based on all problems reported for the 2004 CTS.
Wheel hop or axle tramp caused the rear to lose traction and the stability track and traction control failed to correct the problem. The axle tramp is a severe banging of the rear when there throttle is applied to the car. The rear spun and caused the car to hit a guard wall.