One problem related to body has been reported for the 2016 Cadillac XTS. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2016 Cadillac XTS based on all problems reported for the 2016 XTS.
Water is entering the trunk where the spare tire is located. It happens when it rain and when the vehicle is washed. I cannot determine where the water is entering the vehicle. The trunk floor does not get wet. Only get wet in the spare tire area under the trunk floor.