Maybe the threaded inserts would be so you can move the spoiler up towards the cab? Maybe the hook is for a helmet because you know you'll need one if you're 13.99 or faster 
SNCBOOM is right on about the holes. You should have a packet with the truck that has a couple of L brackets in it. Those brackets, when installed in those pre-drilled holes, serve as the alternate stow position for the wing if you choose to haul anything besides ass!gto19 said:what are the threaded inserts (2 per side )on the bed rails near the front for?what is that plastic hook(hard to describe) on the dash near the right off ash tray?