Yup. Also my differential fill plug is siezed. This also allows me to service it being instead of removing the entire cover to drain fluids, I can just unplug the drain hole and refill it using the fill hole on the diff cover.
I think i would buy one of those just to be able to drain the fluid through a plug hole. Most GM and Ford trucks don't have those, even tho alot of imports do. Nice cover!