So my rear axle broke apart, bearings were toast, I just got the axle out, my question is...Is there any other vehicles that the parts interchange, being that's it's an AWD???

 

I think it has to be a van but could be a 2wd van.

 

You do realize that these vans cover decades of production and dozens of configurations right? You'll have to provide some more details before anyone can help you.

 

Definitely need year, model and powertrain info. There were several different rear ends used in the Express/Savana over the years.

 

2007 Chevy express 1500 AWD 5.3 LS

 

OK, so your interchange is 2003-2014 Express/Savana 1500. It’s a standard 8.5/8.625 10-bolt, so the parts for a rebuild are readily available, but it may be cheaper to buy a used axle assembly. You’ll need to know the ratio and whether it has a locking differential or not.
GT4 is the code for 3.73
GU6 is 3.42
G80 is locking differential

those codes will be on your service parts ID sticker