From about the 2nd week owning our new 21 sienna, we have a strange creaking noise coming from near the front passenger seat. We can’t tell if it’s up high or down below the seat. It only happens when accelerating from a stop or when you come to a stop and bump. It sounds like an old pirate ship lol. I emptied the car completely to make sure it’s not something in the car. I also tried various things like lowering the window or opening the sunroof or opening the door. Any thoughts??