Wildman nailed it,,,,,I have a 97 and just love it 180k miles and going strong, replaced glow plugs, fuel filter, serpentine belt, when my vac um pump went out I first started feeling it when backing up, blew 1 trany on Chinook pass (have to take it out of overdrive when pulling the hills duh) cam sensor goes out easy fix,,,,suggest egt monitor big time trany saver........great truck