Verify if that is "unloaded/dry" weight or max gross weight of the trailer. If it's the dry weight and you load the trailer to the max, you will pushing the limits of the Yukon.
Another important factor is the cargo capacity of the Yukon. 10-15% of the loaded trailer weight needs to be on the tongue for stable towing, and that becomes part of the cargo of the Yukon. Add that weight, the weight of occupants and whatever else you carry in the Yukon, and check that you have adequate cargo capacity. That is often the limiting factor, rather than tow rating.