Sorry. I have one up there now. Going to add more
Oh gotcha, looks like some Pep Boys aftermarket trim. They typically use 3M double sided tape to stick on, just like badges.
If you don't like it, you can remove pretty easily, let your truck sit in the the sun for a bit, then take some fishing line or strong dental floss and to "saw" the adhesive between the trim piece and the bodywork.
You can use Goo Gone to help soften and remove the adhesive that remains. But if you warm it up properly, maybe a hair dryer, it should come off more easily. There are a lot of Youtube videos that show how to do it. Just search car adhesive/badge removal.