Hey yoo what's up! New guy, first post.  Ok, well  I have a 1995 suburban that the pinion seal went and the rear is now making noise. Refilled with fluid, and still noise. It's my wives daily driver and I am trying to find a junkyard rear. The junkyards want around 800 bucks. Thats just crazy for a who knows how many miles rear. So my question is this. Does anyone know what rears from what models are interchangeable? Can I use a rear from an S 10? Or a Impala? Or what ever? It is a 4X4 6lug 5.7 1500 with the GT4 code 3:73 gears. I have found lots of 3:73 rears on craigslist for a couple of hundred bucks, but am unsure of the fitability.  Fitability? Ummm Yah, that's not a word, but hey, I make up my own words all of the time. Especially after some beers. I become a drunken dictionary! Lol...Any help will be huge! Thanks guys, COFFEE