Cadillac 2005 CTS Owner's Manual page 271

Certification Label
United States version shown, Canada similar
The Certification label, found on the rear edge of the
driver's side rear passenger door, tells you the gross
weight capacity of your vehicle, called the Gross Vehicle
Weight Rating (GVWR). The GVWR includes the weight
of the vehicle, all occupants, fuel and cargo. Never
exceed the GVWR for your vehicle, or the Gross Axle
Weight Rating (GAWR) for either the front or rear axle.
If you do have a heavy load, you should spread it out.
Do not carry more than 132 lbs (60 kg) in the trunk.
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CAUTION:
Do not load your vehicle any heavier than the
Gross Vehicle Weight Rating (GVWR), or either
the maximum front or rear Gross Axle Weight
Rating (GAWR). If you do, parts on your
vehicle can break, and it can change the way
your vehicle handles. These could cause you
to lose control and crash. Also, overloading
can shorten the life of your vehicle.
Notice: Overloading your vehicle may cause
damage. Repairs would not be covered by your
warranty. Do not overload your vehicle.
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