Very Strange Noise.. HELP!

[markdoddridge]

Originally Posted by [__--MUD--__]

thats odd...First place I'd start looking is around the fan shroud. But your check engine light and only hearing it at low rpm I'd be looking at the valve train also.

W/ the truck in park at idle or low rpm, does it still make the noise?

Yes, at idle in park and at low rpm it makes the noise, hopfully its not something terible wrong. I had no idea autozone would scan it for free, im definatley gonna do that.

What do i do with the code once i get it?