They are solid trucks in that era.I have an 04 4wd ex cab 6,0 with 250k miles.
Have had to do minor things but easy to work on myself too.Had trans rebuilt at 170k was stil good but had the money and didnt want failure on a trip so got it done.
Replaced waterpump at 240k,radiator at 235k,knock sensors around 242k,exhaust manifold at 245k all done myself plus a couple front wheel bearings and dont plan on parting with truck for a while considering what new ones cost.Get this model truck i recomend a black bear tuned ECU wish i did mine earlier noticable increase in power all around and also added a tru cool trans cooler 40k sized.