I finally got around to figuring out what this damned noise was.

Took off the rear quarter cladding, and there was nothing that I could see that was rolling around in there. I looked at the wire leading up to the red fender light on that side and there was a lot of slack in it. I reattached the cladding and had my roommate wiggle the wire around inside the cladding while I sat in the cab. it was the exact noise that was driving me neurotic. It was getting close to dinner time so all I did was zip-tie off the slack and screw the light back in. I still get the noise on more pronounced bumps, but just going down the road its nice and quiet. I'll have to tape the rest of the slack to the metal inside body to completely silence it <unless someone has a better idea>

Now to get to the vent fans noise. :angry: