I appreciate the input. I'm working on finding a similar truck to test pull my trailer, just to see how it reacts to determine if a problem really does exist. The stickler for me is, my truck has been setup this way for about 25k miles (315's, gauges, toolbox, all the extra gear I always pack around, etc.), and I tow almost every single weekend and sometimes during the week. I've got a pretty darn good idea of what it should and shouldn't do, and all I know is that it USED to pull harder than this, and USED to develop EGT's that I had to be mindful of...