04 Tahoe stereo pinout?

[M1Gunner]

Oh, I'll make it work......[emoji57]

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10.4 let me know how it goes man!

 

[M1Gunner]

Oh, I'll make it work......[emoji57]

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So that schematic is not yours. That's for 'Bose w/ CD' but after looking at your picture and studying all the schematics and different options... your picture matches up to the 'mid line radio w/o rear seat audio'
Here is your correct schematic... the purple wire in your picture was what made me look harder at everything.

Here's the complete set schematics for your system

 

[josephernst2]

I actually have a shop that we rent out half of. There's a bunch of of car parts and a few engine bay wiring harnesses, I'm thinking I'll go see if I can pop out some small pins and see if they fit. If they do I'll solder them up.

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[josephernst2]

I found some wire pins from an old Dell computer that fit into the factory harness. However I connected the 3 wires (H,J and A12) and it didn't work, boo.
M1Gunner, thank you for the updated diagrams. I'll have to study them more. They look pretty similar at a glance, as far as the harnesses that I'm working with go anyways. I feel as though I need to create some sort of return signal to the harness to trick the HU into thinking the XM is there? Unless, if I tap the correct wires the audio signal carries enough to trigger it? Gonna sleep on it. Thanks again everyone.

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[M1Gunner]

I found some wire pins from an old Dell computer that fit into the factory harness. However I connected the 3 wires (H,J and A12) and it didn't work, boo.
M1Gunner, thank you for the updated diagrams. I'll have to study them more. They look pretty similar at a glance, as far as the harnesses that I'm working with go anyways. I feel as though I need to create some sort of return signal to the harness to trick the HU into thinking the XM is there? Unless, if I tap the correct wires the audio signal carries enough to trigger it? Gonna sleep on it. Thanks again everyone.

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Looking over these that fit your set-up, a few routes did change so you may want to disregard the A12 ground and use terminal 'K' the "common aud sig" from Connector 2 along with 'H' and 'J'

 

[josephernst2]

Looking over these that fit your set-up, a few routes did change so you may want to disregard the A12 ground and use terminal 'K' the "common aud sig" from Connector 2 along with 'H' and 'J'

I tried that last night, but I didn't have pin soldered on so I doubt it had a good connection. Plus balancing the HU, holding the ground and messing with my phone wasn't exactly easy lol. I'll pull the HU out again after work and try again with the ground wire pin.

As a thought, does that 12 pin connector with the 2 voice wires (pink and orange) have to be connected for any reason? We don't use on star so I'm not concerned about that.

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[josephernst2]

Well I tried using the K pin. The best I got was with the entire 12 pin harness unplugged, and my 3 wires attached to H, J and K I was able to just barely hear music if I had my phone and HU cranked. But it only did that if I push the on star button with just the Dot. But it automatically switches back to the last source used after 30sec.

I'm going to step away until this weekend, I don't want to damage anything trying to jump wires around. So I'll research the diagrams, and think this through. I started thinking, maybe I'm trying to tap the wrong harness? The HU has the DISC AUX button, what option is that AUX button for?

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[Shunto]

I might have missed it.... is this so you can plug in your IPOD or something?

 

[bluebear15]

@M1Gunner Do you have access to 06 Z71 with Bose and OnStar and Rear Entertainment diagrams? If so those would be helpful.

 

[M1Gunner]

I think I can scrounge a little something together for ya brother!