i get this on and off sqeeching sound from the engine bay. i usually hear it after i've been driving around. engine has only 20,800 miles on it. after driving, as i sit there in idle, i hear the squeeching sound (high pitch) on and off. it also happens when i gently place my foot on the gas or gently tap the brakes.

my guess is it's either coming from the aem cai. i can hear the sound clearly when hood is down, but when the hood is up, it's hard to hear the sound. any idea where it is coming from?