Pontiac Solstice 2008 Owner's Manual page 194

Refer to your vehicle's Tire and Loading
Information label for specific information about your
vehicle's capacity weight and seating positions.
The combined weight of the driver, passengers,
and cargo should never exceed your vehicle's
capacity weight.
Certification Label
A vehicle specific Certification label is attached to
the rear edge of the driver's door or the vehicle's
center pillar (B-pillar) below the driver's door latch.
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It 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.
CAUTION:
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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.