It is probably the cover for your catalytic converter.
Under the seat is where the seat belt sensors are located. By disconnecting these it should stop the noise.
check under the dash by the sterring wheel
In fuse box under hood
under the throttle body
Under hood, passenger side, and under coolant reservoir
The 2007 Pontiac G6 was produced in the United States of America under the Pontiac Brand. It was the successor to the Grand Am, another popular Pontiac car.
The PCV valve is located under the MAP sensor on a 1990 Pontiac Grand Prix. The MAP sensor is in the upper plenum.
it is in the fuse box under the hood
the thermostat is right under your throttle body and it is difficult to get to
it is under the dash on the driver's side
check under the back seat
under the throttle body.