See also:

Rear Seat Pass-Through Door
Some vehicles have a rear seat pass-through door in the center of the rear seatback. Fold down the center armrest and push down on the latch to open the door. ...

Hitches
Use the correct hitch equipment. See your dealer or a hitch dealer for assistance. - The rear bumper on the vehicle is not intended for hitches. Do not attach rental hitches or other bumper-t ...

Reporting Safety Defects to General Motors
In addition to notifying NHTSA (or Transport Canada) in a situation like this, notify General Motors. Call 1-800-458-8006, or write: Cadillac Customer Assistance Center Cadillac Motor Car Divi ...