GMC 2011 Sierra Owner's Manual page 404

Ask your dealer for trailering
information or advice, or write us at
our Customer Assistance Offices.
See
or
for more
information.
The tongue load (A) of any
trailer is very important because
it is also part of the vehicle weight.
The Gross Vehicle Weight (GVW)
includes the curb weight of the
vehicle, any cargo carried in it, and
the people who will be riding in the
vehicle as well as trailer tongue
weight. Vehicle options, equipment,
passengers and cargo in the vehicle
reduce the amount of tongue weight
the vehicle can carry, which will also
reduce the trailer weight the vehicle
can tow. See Vehicle Load Limits
for more information about the
vehicle's maximum load capacity.
Trailer tongue weight (A) should be
10 to 15 percent and fifth-wheel or
gooseneck kingpin weight should be
15 to 25 percent of the loaded trailer
weight up to the maximums for
vehicle series and hitch type
shown here: