An OASIS report, and any documentation the current owner can provide on its maintenance history.
If its at a dealer, have them run the report and give you a copy. If they refuse or seem hesitant, tell them you're not interested in that truck, and you want to know what they're trying to hide. If its private party, get the VIN & go over to
www.6literpowerstroke.com & post a request in their OASIS section. They usually post back next by next day.
I've kept all reciepts & logged all maintenance for the truck. When I get ready to sell, I want whoever gets it to know they have a good truck.
