One problem related to power train driveline has been reported for the 2003 Cadillac CTS. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Cadillac CTS based on all problems reported for the 2003 CTS.
Rear differential whine on my 2003 Cadillac Cts. The slightest pressure under light acceleration causes the whine. Dealers are useless.