GMC 2010 Sierra Owner's Manual page 422

Refer to the Truck-Camper Loading Information
label in the glove box for dimensions A and B as
shown in the following illustration.
Use the rear edge of the load floor for
measurement purposes. The recommended
location for the cargo center of gravity is at
point C for the CWR. It is the point where the
mass of a body is concentrated and, if suspended
at that point, would balance the front and rear.
5-46
Here is an example of proper truck and camper
match:
Camper Center of Gravity
A.
Recommended Center of Gravity
B.
Location Zone
When the truck is used to carry a slide in
camper, the total cargo load of the truck consists
of the manufacturer's camper weight figure, the
weight of installed additional camper equipment
not included in the manufacturer's camper weight