I was wondering if there's anyone else out there who's noticed what seems like to me a funny sound when you turn the a/c on after initial startup? I started my truck today after work and probably a few seconds later turned the a/c on and I heard some type of sound from under the hood when the a/c came on. Am I dreaming or are there some of you who have noticed the same thing? Any input on this would be much appreciated. I feel like it's something normal but just wanted to post and see what you all had to say about it and explain it to me.