Alright, on my 03 LB7 with 130K on it, I just started hearing a weird noise. It sounds like a whistling noise, almost a "tinny" rattle noise. I hear it outside the truck, not while I am in it. Mostly at idle it is most noticible, but it is still there off idle when I rev it up to 2000 rpm or so. I can hear it most when I am under the drivers front wheel well area, or under the front bumper towards the drivers side. If I squeeze the intercooler pipe above the drivers side valve cover, the noise changes, but does not go away. I checked the intercooler pipes and clamps and didn't find any leaks. Any ideas?