Knminton,
The ride was part of the issue in selling it. The van was my wife's daily driver. It rode like a truck, not surprising for a 1 ton van right?
I would have to agree that the vans with the OEM shocks are underdamped. This really was only noticeable under load. I replaced all four shocks with Bilsteins and the ride was much better. In fact, the more weight the van had, the better it rode. When towing our camper it actually rode and handled really well.
It was empty around town that after 3.5 years that my wife got tired of the ride. I was even running the tires at 50 PSI in the front and 62-65 PSI in the rear. Because of the stiff suspension, you started to notice every pot hole and bump. I was tempted to leave my salt in the van year round to improve the ride. Had it been my daily driver I probably would have tolerated it, but that is also because I loved the way it drove with the 6L/6 speed and it returned pretty decent gas mileage for what it was.
I think the issues that carringb has complained about is when you are at or exceeding the limits of the vehicle. I know that I once had 2000# of building materials in the van and it was fine, no where near the bump stops.
We only used our camper two times this past year and it didn't justify having that large of a vehicle when my wife didn't enjoy driving it anymore. I questioned her on how we were going to travel after having all of that room and she simply said we would have to travel lighter. We have now made three weekend trips with the Yukon XL and have survived and taken everything we have needed, and that included the dog two of the times.
And yes, the ride of the Yukon XL is pretty nice. It really is amazing at how smooth it rides.