GMC 2006 Sierra - Manual (Page 372)

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.
After you have loaded your vehicle and camper, drive
to a weigh station and weigh the front and rear wheels
separately. This will tell you the loads on the axles. The
loads on the front and rear axles should not be more than
either of the Gross Axle Weight Ratings (GAWR). The
total of the axle loads should not be more than the Gross
Vehicle Weight Rating (GVWR).
Open the driver’s door and look at the Certification/Tire
label to find out your vehicle’s GAWRs and GVWR.
If your vehicle has gone over the weight ratings, move or
take out some things until all the weight falls below the
ratings.
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