so i noticed today when i was walking around my truck a clicking noise coming from under the hood... Raised the hood and can plainly hear this noise coming from what sounds like the intake manifold(factory) Took it to Chevrolet and the guy said it either sounded like a leak or possibly a bad lifter? here's a clip i took to get some feedback from you guys. It sounds like a damn diesel. Sounds a little distorted on this video. I have an extended warranty on the motor so im not worried about the cost.....just wanna know whats going on.

http://s413.photobucket.com/albums/p...urrent=001.flv