03 suburban stereo wiring?

Ok, so today I was wiring it up for my sub and amp with a loc.  I've done this same setup for a couple of friends before with no problems.  Yesterday I looked through here had found a wiring diagram for what I though was my vehicle (https://www.the12volt.com/installbay/forum_posts.asp~TID~53150).  However, it didn't match my wiring harness.  Unless I'm color blind.  For example, their was absolutely NO Yellow wire in the harness.

The thing is the harness looks factory to me.  So what I have here is the Delphi Delco part # 15184935.  It's a 6 disk changer with am/fm, cd, changer, On-Star, NO xm.  I cut into a couple of different wire sets and with no success.  However, I did get a signal with the following combination: blue/blue black.  But for some reason the gain doesn't seem to affect it at all.

Any ideas?  Theirs got to be another wiring diagram.  I did place an email with Delphi, but who know if or when they'll respond.

Thanks.

i am an idiot wrote:

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Does the vehicle have the Bose audio system?

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Yeah, it has the Bose sound system in it. 

I went down today to a local stereo shop and paid them $30 to wire up the LOC, done deal.  Kind of disappointed that I had to result to this.  They tapped off one of the speaker amps to get the high signal.  I didn't know where the amps were....all's well that ends well.

Thanks.

Here we go.  This pdf is directly from Delphi.  It's a pinout description of my stereos harness, however, it doesn't contain the wire colors.