This could go either fuck or fuck yea...
About two weeks ago on the burb, started hearing a rattling like a heat shield was loose or something when in gear at a stop. It sounded like it was under the truck, so got under the truck, nothing was loose or moving, although I did tighten up the back skid plate bolts another half turn. Got in, all things were quiet.
A day or two later, the noise was back. In the meantime, it sounded like it was further up near the firewall. So yesterday, I went in from top to try and find it.
Again, nothing amiss under quick visual inspection, until I noticed that the heat shield on the passenger side exhaust manifold was up against the little shield for the A/C accumulator. Sure as shit, I tap it and it's completely loose... Turns out the two bolts in the center of the shield, holding it on to the exhaust manifold, completely rusted out and it was flapping in the
breeze. Well, it no longer rattles.