Welcome Aboard !!!
Given your stated timeline of events and inspections I'll guess that you need professional (Cadillac dealership) inspection and documentation, then maybe legal recourse.
IF the clutch cylinder and/or transmission is/was filled with water and there are other damages then that's way out of this forum's repair advice abilities.
Given your stated timeline of events and inspections I'll guess that you need professional (Cadillac dealership) inspection and documentation, then maybe legal recourse.
IF the clutch cylinder and/or transmission is/was filled with water and there are other damages then that's way out of this forum's repair advice abilities.