GMC 2015 Sierra Denali Owner's Manual page 256

Vehicle Series
1500
1500
2500/3500
Standard Box
2500/
3500 Long Box
2500 Fifth-Wheel Gooseneck
3500 Single Rear Fifth-Wheel Gooseneck
Wheels
3500 Dual Rear Fifth-Wheel Gooseneck
Wheels
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
Weight-Carrying or
Weight-Distributing
Weight-Carrying or
Weight-Distributing
Trailer rating 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.
Driving and Operating
Maximum Tongue
Weight
363 kg (800 lb)
544 kg (1,200 lb)
680 kg (1,500 lb)
907 kg (2,000 lb)
1 361 kg (3,000 lb)
1 814 kg (4,000 lb)
2 495 kg (5,500 lb)
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.
If a cargo carrier is used in the
trailer hitch receiver, choose a
carrier that positions the load as
close to the vehicle as possible.
Make sure the total weight,
including the carrier, is no more than
half of the maximum allowable
tongue weight for the vehicle or
227 kg (500 lb), whichever is less.
Total Weight on the Vehicle's
Tires
Be sure the vehicle's tires are
inflated to the inflation pressures
found on the Certification/Tire label
on the center pillar or see Vehicle
Load Limits on page 9-15. Make
sure not to exceed the GVWR limit
for the vehicle, or the RGAWR, with
the tow vehicle and trailer fully
loaded for the trip including the
weight of the trailer tongue. If using
9-77