Chevrolet HHR 2011 Owner's Manual page 172

{
WARNING:
Power is always supplied to the outlets. Do not
leave electrical equipment plugged in when the
vehicle is not in use because the vehicle could
catch fire and cause injury or death.
Notice: Leaving electrical equipment plugged in for
an extended period of time while the vehicle is off
will drain the battery. Always unplug electrical
equipment when not in use and do not plug in
equipment that exceeds the maximum 20 ampere
rating.
Certain electrical accessories may not be compatible
with the accessory power outlet and could overload
vehicle and adapter fuses. If a problem is experienced,
see your dealer.
When adding electrical equipment, be sure to follow the
installation instructions included with the equipment.
See Add-On Electrical Equipment on page 6 100.
Notice: Hanging heavy equipment from the power
outlet can cause damage not covered by the vehicle
warranty. The power outlets are designed for
accessory power plugs only, such as cell phone
charge cords.
4-16
Rear Power Plug for Converters
The vehicle may have a power plug connector located
in the rear cargo area on the passenger side behind the
service panel. The power connector wiring can be
accessed by removing the service panel to begin
installation.