Quote Originally Posted by jgruberman View Post
Also, I am leaning towards exhaust leak, and I say that because my truck seems to sound a bit more "metal gasket rattley" if that makes sense.

Do you know how you just KNOW what your truck sounds like?

Well, if I had a list of different sounds presented to me, it would sound like a metal rattling/whistling sound, even when just idling.
It shouldn’t be too hard to track down.

If you don’t want to do the soapy water check with the engine running, just plug the exhaust air from a shop vac or compressor in the tailpipe, then check with soapy water.