Welcome to the forums SC.
I'm running an '01 version of the same truck, only 2wd w/a 5 speed. I've got 80K on it. At 38K miles you're probably going to need front pads, unless they've already been done. A cooling system flush wouldn't hurt, either. I've had a lot of cooling system related problems w/mine.
I see you don't have any step rails on yours. Neither does mine. I'm thinking of a set of sliders, but I don't know if I want to add the 100lbs. Hm, might help w/my center of gravity.