Hello pilot owners, recently, I noticed my 08 pilot, at idle in the garage, is making a very high pitched noise that can be easily picked up from left front side under the car (under the driver's seat). I tried to hear from under the hood, can't pick up any. This noise doesn't seem change with revving the engine. Changes I have done recently including timing belt, tensioner, tensioner pulley, idler pulley, water pump, serpentine belt, transmission fluid, power steering pump fluid. I appreciate your any suggestions/hints.