I am looking to get another rim so that on an upcoming trip, I can take a spare with me. About 95% of my driving is local under 30 miles so I wont carry it locally but on a long trip, I would like to have a spare. I figure that if Im going to do that, might as well do a full size spare and a 5 tire rotation. I've got a 14 LT, no nav or heated seats. Do I need to get any RPO codes off the broadcast sheet or does someone happen to know the part number?