GMC 2010 Sierra Owner's Manual page 423

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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