If it’s in the cab instead of under the truck with the spare, I think yes. But it’s entirely up to the cop whether to decide that the tire iron they found is a “weapon” or not. Lot’s of folks seem to think that if they have a double duty item like a bat that they can’t be charged - they are very wrong, more so if they are brown. 
Also, ordinary tools magically become “burglar” tools, but unlike concealed weapons charges you have to have (or a cop has to claim you have) “intent”:
"Every person having upon him or her in his or her possession a picklock, crow, keybit, crowbar, screwdriver, vise grip pliers, water-pump pliers, slidehammer, slim jim, tension bar, lock pick gun, tubular lock pick, bump key, floor-safe door puller, master key, ceramic or porcelain spark plug chips or pieces, or other instrument or tool with intent feloniously to break or enter into "
[emphasis added]
