Aaron, not A-A-Ron

Thanks for the help everyone! I had my parts girl/wife find one at the dealer today, before heading to the parts store, $4. Now to see how my differential gasketing skills are!

I saw these, I don't know if if they'll fit.

Thanks for the 'HELP' suggestion! Forgot about that one. With Covid, going to stores in suburbia can be challenging. Better grab my mask.

garagerog, Would I have to worry screwing it in to far? I wouldn't think so, but making assumptions was worked out so well for me...:)

Advance, Auto Zone, and AC delco websites were no help either.

Cant find it, specifically, on Rock Auto. Just the drain plug for ones equipped with one, mine isn't. Unless the drain and fill plugs are the same size, they certainly dont look the same. The drain plug has the hex head, and the fill plug has the recessed 3/8" socket head

I'm trying to replace the fluid in the rear differential of my 2003 suburban. Before I started removing the cover I tried to get the fill plug off first. Of course it stripped, even after scraping the rust and using lots of PB Blaster. I eventually got it out, but now I could really use a replacement fill plug. Does anyone have the part number or know of a plug that will fit? This seems to be a common problem, but I can't find the part anywhere online. I guess I could reuse the rounded plug...one last time...