My truck was bought as a theft/recovery. I'm aware of all the spots that our vin exists on the truck. But, they have all been removed. The only spot I haven't checked is on top of the chassis, right side. Well, the other day I removed my headliner cause it's been hangin'. And on the other side of the headliner is the number 933... handwritten big in blue marker. Anybody know anything bout Sy #933? Could this be my production number?