GMC Hybrid 2007 Owner's Manual page 11

In the truck bed, they are located on the passenger
side near the tailgate.
The power outlets are not designed for equipment
with high initial peak starting power of greater
than 2,400 watts, such as some air compressors,
table saws, etc.
Short Circuits, Overloads and
Ground Fault Detection (GFD)
The 120-volt AC power outlets are protected
against short circuits, overloads and ground faults.
If the system detects a short or overloaded
circuit, it will immediately shut down the outlets
and the light next to the APO button will flash,
while at the same time a 120V OVERLOAD
message will appear in the Driver Information
Center (DIC). After the fault condition is corrected,
the system can be reset by pressing and
releasing the APO button. See "APO Operating
Modes" for more information on the APO button.
Short circuits may occur because a defective
extension cord or defective electrical device
is plugged into an outlet.
11