Chevrolet Silverado 2007 Owner's Manual page 441

Here is an example of proper truck and camper
match:
A. Camper Center of Gravity
B. Recommended Center of Gravity 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 figure, the
weight of camper cargo, and the weight of
passengers in the camper.
The total cargo load should not exceed the truck's
cargo weight rating and the camper's center of
gravity (A) should fall within the truck's
recommended center of gravity zone (B) when
installed.
You must weigh any accessories or other
equipment that you add to your vehicle. Then,
subtract this extra weight from the CWR. This extra
weight may shorten the center of gravity zone of
your vehicle. Your dealer can help you with this.
If your slide-in camper and its load weighs
less than the CWR, the center of gravity zone for
your vehicle may be larger.
Your dealer can help you make a good
vehicle-camper match and help you determine
the CWR.
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