Stock radio part numbers and differences

[R34P3R]

Im working on a project for my trucks radio. Im gonna need parts from other radios and I'd like to start off with all of the information I can get. My radio's part # is 15850275 and I don't understand why it looks the exact same as some others but has a different part number. Can anybody guide me to a list of all the different part #'s and their differences? I'm looking specifically for any brothers, sisters, and cousins of mine...

 

wiring diagrams and pin outs for any of these radios would be F****** AWESOME!!! XM units, Tape decks, CD decks, anything. thanks!

[Sox Fan]

Try http://www.gmupfitter.com, it will give you the wiring diagrams you need, as far as the different part numbers with the radios, good luck, I have not found any concise information out there.

[R34P3R]

Great link! Absolutely useful! ...but they didn't have anything on the radio. My guess is that delphi has what i'm looking for. Anybody know of any sites with delphi's library for GM trucks?

[R34P3R]

Alright so I got my hands on this pin-out diagram for my specific radio. Problem now is that I don't understand what most of these abbreviations are nor what the pins actually do. I only need info for pins A through M. Anyone know anything about this?