@Liver No need to feel dumb, you're new to the site. Occasionally new-joiners get someone to just answer them straight out, but depending on the subject, it's best to try a search to get more opinions.
This isn't intended for you, but people who have been on the site for a few years do get a bit tired of answering the same questions again and again. Especially when the questioner doesn't like the answer and starts to argue with them!
Another tip: The built-in search on this site does have some limitations, especially with words under 4 characters. Of course, a lot of acronyms in the automotive industry are exactly that! So you can go to google and do the same search, just include "explorer ST" or "explorerst.org" in the search. That'll get you around the built-in search limits.