I had an 01 6 speed and had descent luck with it.
I did replace a couple lift pumps but never an injector pump. IMO a fuel pressure gauge is mandatory on these trucks.
I also replaced a vacuum pump seal, transfer case seal and a couple tie rods.
Not terrible but not outstanding. Truck never left me stranded or anything.
My mileage was pretty good, but my truck was not stock. i had a Southbend ConOFE, 100 hp injectors, EDGE Juice, AFE air intake, 4" turboback. I could usually get 18-20 MPG on the highway. 16-19 around town. 13-16 pulling a four place or car.
From people I've known, they have had good luck with the autos.
If it has 130k on it and hasn't been rebuilt, then expect to rebuild it. Also, the injector pumps have high failure rates so if that hasn't been done, you might expect it.
IMO, spend a few more grand and try to find an 03 or 04. My 03 is a lot better truck then my 01 ever was.