This is what my family owned when I was in high school.
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The Green Z71 was mine, sold with 264K miles. I put a ball joint in it and a transmission (first car for a teen driver, it saw alot of off roading) and with a 4L60 I wasnt surprised, but overall it was cheap to maintain, got about 15-17 mpg with a Vortec 305 and 3.73s
I still think OBS Vortec trucks are about as good as they get for a cheap utility vehicle. Put some shocks on them and they actually drive really well, eventually you made need a WP, Intake gaskets, a spider (if a vortec motor), idler and pitman, and ball joints (if you buy a 4WD). All those things are really cheap except the spider at about 200 and the lower ball joint labor on 4WDs.
The two dodges are still being driven.
The blue is an 03 2WD 4.7 had 300K miles on it, has had one waterpump, a thermostat, a radiator, a condensor fan, brakes, plugs once or twice, tires, wipers, oil changes and air filters, and a few turn signals. Its on factory tranny fluid (scared to change it at this point), factory diff fluid, factory p/s fluid, stock wheel bearing and all stock front end parts, in fact the headlight bulbs are the originals. This thing has towed a flat bed trailer hundreds of times, a huge camper a few times, the camaro 7 or 8 times, a suburban a few times. It is used like a truck, in fact in the picture the bed is full of dirt. I just plain cant fault the truck, its been amazing.
The red one is an 05 4WD Hemi. It has 320K. Has had a condensor fan, plugs, brakes, oil changes, and egr solenoid, air filters, a fuel pump, thermostat, wheel bearings and ball joints (to be expected on a big three 4WD truck). The red one has had a few more problems than the blue one but still it has been an awesome truck, because it is used and abused, and it has pulled or towed twice as much as the blue truck.
The blue one gets about 19 and the red gets about 17.
I strongly recommend a full size truck from the Chevy or Dodge if you can go used. The depreciate like crazy after a few years or they used to, dont keep up with the newest generations, they will tow whatever you grow into next, dont take that much of an economy hit compared to mid size, and they are downright cheap to run. After working on them for a long time im not a fan of the Ford stuff, and the jurys out on the newer ecoboost and 5.0 stuff.
Or you could look at the newer dakotas, they are built on the full size platform and you can get the 4.7 in them.
I have friends that have frontiers and tacomas and they either arent very useful (4 cyls, small cabs) or they poor economy of a full size without the utility (V6s).
Whatever you do stick with something with 16s or 17s and a common tire size. After putting a few sets of good 20" tires on the red one im tired of it. I can almost buy 4 good tires on the blue one for the price of 2 mid grade tires on the red one.