Have you dropped the back of the rear seat yet to see if there is a gun safe?

And I assume there is no locking gas cap? (Yes i know these new truck have not had any in a while, I just traded in a 2016 but I feel better asking)

Or how about a custom lock for the spare tire? Tool box under the hood or seat?

 

I checked for any gun safes, etc and found nothing.
​​​​​I did check for the locking gas cap and that wasn't it either. I'll check the spare next! Thank you all for the help!

 

Looks like the keys to the cleats and the locking piece where you drop your spare tire.

 

They don’t look like their OEM, the knurling makes them look like replacement keys. If they don’t fit the boxlink then ?????

 

trailer hitch lock?

 

Here are the keys pictured that I was given in this order:
Car keys
Boxlink key (locks a tie down accessory in bed)
Bedcover key
Mystery key (I also pictured it next to boxlink key for size comparison)

Car key
Boxlink key
Bedcover key
Unknown key
Unknown key and boxlink key

 

Easy answer - if you've gone over the whole truck and verified there are no more locks, then simply put them in an envelope and stick them in the glovebox. The fact that they have no brand stamped on them basically says they aren't important, but I wouldn't toss them.

 

Looks just like my hitch key that locks the pin into place.

 

Honestly, it could be the previous owner's mailbox key.

If you've gone through everything on your truck that's keyed and it doesn't fit, put it in a ziplock bag in your glovebox/centre console and forget about it.

 

Thanks everyone. I'll store them away. Appreciate the feedback!