GMC 2011 Yukon XL Denali Owner's Manual page 327

Trailer tongue weight (A) should be 10 percent to 15 percent and fifth wheel
or gooseneck kingpin weight should be 15 to 25 percent of the loaded
trailer weight (B) up to the maximums for vehicle series and hitch type
shown below:
Vehicle Series
1500
1500
Do not exceed the maximum
allowable tongue weight for the
vehicle. Choose the shortest hitch
extension that will position the
hitch ball closest to the vehicle.
This will help reduce the effect of
trailer tongue weight on the
rear axle.
Hitch Type
Weight Carrying
Weight Distributing
Trailering may be limited by the
vehicle's ability to carry tongue
weight. Tongue or kingpin weight
cannot cause the vehicle to exceed
the GVWR (Gross Vehicle Weight
Rating) or the RGAWR (Rear Gross
Axle Weight Rating). See Total
Weight on the Vehicle's Tires later
in this section for more information.
Driving and Operating
Maximum Tongue
Weight
272 kg (600 lbs)
499 kg (1,100 lbs)
After loading the trailer, weigh the
trailer and then the tongue,
separately, to see if the weights are
proper. If they are not, adjustments
might be made by moving some
items around in the trailer.
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