iamdub
Full Access Member
Honestly dub, that looks like an add on...I don’t think mine has that. I think, and bear with me im speculating, since its right above the filter access door that you dont have, the po may have had an odor in her box, so instead of gm doing the right thing and adding the door and fliter (may also be prior to door and filter being available.... years ago I remember guys on the truck forums making their own doors out of a piece if metal) and they used it as a anti box stink spray port.... no im not gonna look at mine...
I'm certain it's not a factory and I believe it's to introduce a core cleaner. I guess I'm hoping someone has seen or used this particular type of thing and if there's more to it or a cleaner kit I can get that utilizes it.
I'll definitely investigate once I cut it open. Nurse, pass the scalpel, please...