I have a 2008 Pontiac Gxp and am trying to diagnose an annoying squeak. I'm just trying to get some help with the easiest way of figuring out what is making a noise. Is there something I should try first to test it. also it only does it when you barely start the car. It doesn't seem like it's doing anything to it performance the noise is just annoying. Kind of OCD about the way the engine sounds. Thank you for your help