Sorry for the delay. Parents had a housefire that pretty much destroyed everything, and killed all 3 of their dogs. I've been busy with that.

As for the truck. I was bored and decided to mess with it today. I took that little cover off and loosened the adjuster. It was a little lose, but not a ton. I put a just a little pressure on it and tightened it back up. It makes MUCH less noise. I can still hear it just a tad, but it doesnt sound like a loose ubolt rattling around on an exhaust pipe anymore. Im not afraid its going to blow up going down the road anymore. lol
Looking at diagrams, it looks like the other chain is adjusted with a hydraulic tensioner. Should these chains make any noise at all, or is a little noise with age/miles ok? It has 119k miles on it right now.