I change mine every 3000 miles! It's really not that hard, just got to put your head in the firewall! Change your CBR valve! IT's towards the front of the engine has three hoses coming off of it! One goes to the oil neck, the other two go to the air intake! Mine smokes when you just start it, it's really normal! IF it's a dark gray, that's cold diesel! IF it's dark black, that's oil, needs to warm up! Sounds like a good buy! The Light!!!!! What you have to do is buy a chilton's book and it gives you step by step instructions on how to drain your tank without droping it for a diesel! Mine has that light and I looked into it, lost the book, but might try and find it if you can't find a book that covers it! You have water buildup in your tank! You should drain it and your truck will get much better fuel milage and you won't rust anyhting out from the inside out, like lines since you don't know how long it's been sitting with water in the tank! You can try to check the wires running to the sensor in the tank first to see if there's a short, but what you're more than likely going to find is that it's the sensor! Draining it isn't very hard for what I can remember! All you have to do is disconnect one line and let the pump run! It says exactly how in the book, plus, it's good to have a book handy! OTher than that, it's sounds like a really good truck! You'll love the diesel!
