factory radio wiring schematics

Hoping someone can help me get the wiring schematics for the factory radio in a '02 or newer model. The radio is GM's premium option offered (I believe). It's a 6 disk in dash changer, believe there is an amp that comes with this option too. It's actually for a Trail Blazer ('03) but figured I'd ask here as well 'cause I believe I have seen these radios in some Denali's. Thanks to whoever can help

You might find the info you need here.

http://www.the12volt.com/installbay/default.asp?ForumID=0

Not sure exactly what you are asking. In GM trucks, all the radios pre 2003 were standard setups while those 2003 and newer are Databus where they work in conjunction with the BCM.

Well, think I found what i needed. However, if you can define BCM that would be great. It is an '03 radio, but more than anything I'd like to know what you mean by BCM, just for the sheer fact of knowing. Thanks

Well, think I found what i needed. However, if you can define BCM that would be great. It is an '03 radio, but more than anything I'd like to know what you mean by BCM, just for the sheer fact of knowing. Thanks

BCM=Body Control Module; controls/monitors certain accessory-related functions like factory radio, seat memory, trip meter, etc.

Not that you asked, but remember the following for future reference:

PCM=Power Control Module; controls/monitors powertrain-related parts/functions like engine, ignition, transmission, etc.