Can I use the SD Card slot as a library source for my music?

Yes, some here can be a bit full of themselves.
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whats a zoomer? ohhh ok so going with name calling is the best solution i get it now. Hey coffin-dodger did we answer your question?

 

In the OP's defense, that does kind of look like an SD card slot below the USB connector. But, it's not, I checked the manual.

 

The sd slot card was used from 2016 until sometime in 2020 they stopped. So sometime in 2020 and up they dont have the sd card slot anymore. If you want to update the map/gps system you have to go back to the dealership and they can update thru the usb port. I also believe you can update thru an app if im not mistaken. So let me reiterate sometime in 2020 models and up dont have the sd slot anymore. Sorry i tend to forget that people know this already but they dont.Seems @faawrenchbndr knew everything about the truck before he even bought it lol

 

What OP posted a pic of is the USB port which looks like it has a slot below it that might fit an SD card. He wasn't talking about the SD slot on the head unit from earlier models. He couldn't have posted a pic of that because it doesn't exist on his head unit.

 

exactly my point, either way ops is 2021 so i knew already from the getgo it doesnt have one

 

This scene though.

Jackie Gleason as Smokey (hollering out the door): "Junior, you want something?"
Junior (feeble reply from parking lot): "Hush puppies, Daddy"
Smokey: "WE AINT GOT TIME FOR THAT CHIT. SUMBITCH!"