For the life of me I can not figure out what this part is called or find it anywhere. It’s on the bottom of the front doors. I looked at the GM door/body breakdown and it’s not showing anywhere. Any ideas?

 

https://smile.amazon.com/Universal-A...5361909&sr=8-6

This is what I used, they have different sizes and styles available.

 

https://www.gmpartscenter.net/oem-pa...-lwr-15959389/

 

Thank you!