Your 55 weighs no more than an average sized modern car. My 2009 4-door weighed 4000#. If a 2200# trailer can't carry a 3400# car there is something seriously wrong with it, but I can see U-Haul putting an unreasonably low rating to protect themselves from lawsuits. Do they post an actual weight rating, or just told you it couldn't handle it?
Even without all the specs on the Yukon, I still can't imagine it not being able to handle the load either (presuming it's in good repair).
