While these trucks certainly can go longer then that it is getting up there in mileage.
Depending on how it was taken care of it could be a good truck for you or a nightmare money pit. First off I would say if it is lifted and/or running a tuner or modded (over sized injectors etc) I would stay away.
Second, with that kind of mileage the entire front end could need replacing if it hasn't been already. Ball joints, hub bearings, tie rods, steering box, so look for any play up there. That was a weak point of the 3rd gen trucks.
The engine is pretty solid but could need injectors at some point? Transmission is decent as well as long as the truck isn't modded or abused. Again, a lot of this has to do with how the truck was taken care of so really hard to predict.
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