Comments towing with a recent Yukon 6.2L?

I am looking at the 2015 'i' model year Yukon Denali with 6.2L 420 HP and 460 ft/lbs torque. We are a family of 6 and are looking at the K-Z S322BHK which has a GVWR of 8800. The Yukon says max towing...