Mystery electronic box

Hey there fellas. While cleaning out the previous owner's mess in my new-to-me truck, I got to the compartment underneath the passenger rear seat, and there I found this box. It had a black plastic cover.
I tried searching the forum for this but didn't find anything.
I'm at a loss as to what it could be. Tried my best to get a picture of the label.
Its maybe 8"x8" by 2" thick, aluminum body.

 

It’s an amp.

https://www.ebay.com/p/671280854?iid=156107396369

 

Oh, duh! Thank you for the reply

 

Do yourself a favor: Read this thread ->. https://www.tundras.com/threads/so-you-wanna-buy-just-bought-a-1st-gen-tundra-eh.115928/

It talks about the audio layout and special steps you need to take if you ever update the stereo, now you know you've got the non-JBL amplified system.

 

I did indeed read through this thread before I bought the truck, but I skipped right over the audio section, I was hyperfixated on the mechanical aspects. My bad, will read lol. Thanks

 

Welcome to the forum Josh.