GMT900 Bose Premium Amp to Luxury Amp Upgrade

[juan84]

So is it safe to say I can cut the dark green wire for anc to disable it

sent from galaxy s6

 

[Reebok59]

Can you provide a little more information to your question? I am not sure what "anc" is. The only dark green (D-GN) wires I have documented in this thread are associated with GMLS, Subwoofer, VNC Mic, LF Audio in and RF Speaker.

 

[juan84]

Sorry I was referring to active nois control been looking around trying to find how to disable it on my Yukon . I added a sub to factory radio now getting a noise feed back through sub

 

[Reebok59]

I thought you may have been referring to Active Noise Control (ANC). However, ANC is very different than Vehicle Noise Control (VNC). Depending on the Bose Amp you have, you may have one or the other. The UQA systems (2.0 Bose Amps with 3 connections) have VNC with one MIC in the console (ie, the D-GN wire to the MIC that I think you are referring to in your question). The UQS systems (5.1 Bose Amps with 4 connections) have ANC with 3 MIC's in the headliner and an engine RPM signal from the ECM. These are all inputs to the Bose Amp. Having said that, if you have VNC with the single MIC in the console, I am not sure if cutting the D-GN wire to the MIC will actually disable it. You can simply unplug the MIC to see what happens. The connection is just under the cup holder on the left. The Bose Amp has a timer in it that checks NOISE every 5 minutes and compensates for it. So I am not sure how it will react to the MIC being disconnected. However, if you have ANC, it is much more complicated. Sorry, I am not much help in disabling VNC or ANC. I have no experience with it. Good luck.

 

[juan84]

I thought you may have been referring to Active Noise Control (ANC). However, ANC is very different than Vehicle Noise Control (VNC). Depending on the Bose Amp you have, you may have one or the other. The UQA systems (2.0 Bose Amps with 3 connections) have VNC with one MIC in the console (ie, the D-GN wire to the MIC that I think you are referring to in your question). The UQS systems (5.1 Bose Amps with 4 connections) have ANC with 3 MIC's in the headliner and an engine RPM signal from the ECM. These are all inputs to the Bose Amp. Having said that, if you have VNC with the single MIC in the console, I am not sure if cutting the D-GN wire to the MIC will actually disable it. You can simply unplug the MIC to see what happens. The connection is just under the cup holder on the left. The Bose Amp has a timer in it that checks NOISE every 5 minutes and compensates for it. So I am not sure how it will react to the MIC being disconnected. However, if you have ANC, it is much more complicated. Sorry, I am not much help in disabling VNC or ANC. I have no experience with it. Good luck.

Yea unfortunately I have the more complicated one lol the denali


sent from galaxy s6

 

[roadcrew]

Scott, thank you so much for the very detailed write up. . . you've saved others so much work! I always puzzled over why my Silverado's Bose system doesn't sound nearly as impressive as Bose systems I've had in Corvettes. Would it be too much trouble to get the P/N from you for the "plug and play" Y91 harness you bought? I've searched ebay, but most listings only identify them by year/make of vehicle, not by Y91 option. I could just buy one and take a chance, re-pin it if necessary, but if I could get the P/N for the one you ordered, I'd rather start out with the right one.

Thanks!

 

[Reebok59]

William,

Glad to know someone may benefit from me sharing this upgrade. The P/N of the Denali Y91 Console Wiring Harness that I used is 13596837 and it was removed from a 2008 Denali XL. If the harness is from a Denali with the same rear seat radio and DVD set-up as yours, it should work just fine. Good luck. Mine is still working great! Only thing is the rear speaker mute issue mentioned above. But since I have learned that there is a non-Y91 and a Y91 version of the RSA Module. Funny that they have the exact same part number. Not sure yet if it is just a software issue that can be reprogramed or not. Either way, it is not an issue I cannot live with.

BTW, the VNC mic P/N is 15240415. You will need one of these too. Most of the time the salvage yard will cut these loose from the harness unless they get very specific instructions.

Good Luck!

 

[roadcrew]

Scott,

Thank you so much for the quick reply and the additional information. Greatly appreciated! Actually, my truck does not have any rear entertainment. I just assumed there would be no compatibility issues with something that's absent. . . I hope I'm not wrong. Also, I'm not running the stock head unit, but a Rosen GM1210 which is a bone-stock appearing head unit with built-in NAV/XM/Bluetooth/iPod interface and full compatibility with the premium/lux Bose, OnStar, backup camera, CAN/UART (steering wheel controls, etc). Also, Rosen provides wire harnesses for both the premium and lux Bose system. . . so I'm thinking I shouldn't have any issues with needing to reprogram anything. Fingers crossed.

Thanks again,
Bill

 

[iamdub]

Posting here for future reference. Thanks for sharing this info!

 

[roadcrew]

Scott,

I just want to make sure I'm understanding your instructions correctly. I got my Lux amp & harness yesterday. I decided before making all the mods I'd test the amp to make sure it's good. Following your pin charts, I cut A2&A3 on my Y91 harness. For testing purposes, I left C10-C12 alone, as I understood they were only for NAV voice prompts (my head unit has built-in NAV).

With no other mods, I plugged in the new Y91 harness and LUX amp and powered up the head unit. If I understand things correctly, the amp should at least come on and play sound through the front speakers. My head unit (Rosen) is compatible with both the premium and Lux Bose amps without any programming changes. . . and it plays fine through the stock premium amp. I'm puzzled why I don't at least hear sound in the front speakers and I'm thinking they sent me a defective amp. Does my thinking here sound correct, or was one of those other mods (A6/GMLS or C10-C12) necessary before the amp will even work?

I'm leaving for a cross-country trip tomorrow and would sure love to have this thing working for such a long drive!

Thanks
Bill