Yes, you did find the correct answer. I got the Curt Trailer Hitch Receiver Class V XD - 2" hitch. This has a 2400lb tongue weight rating. I now feel comfortable taking the WD bars off to park when needed. I also installed a Prodigy P3 brake controller.
The 3.42 is the only rear axle. There was no requirement for the G80 to achieve the tow rating.
I focused my search on 2014s, as some of these had the backup assist and rear backup camera. My other requirement was to have power mirrors. Most of the rental vans come with LT trim. Some come with power driver seat.