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
under the throttle body
In fuse box under hood
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.
under the rear seat, or in the engine compartment.
Up and under the dash /center console.
There are relays in under or by the grill
under the throttle body.
it is under the dash on the driver's side