What did you do to your NNBS GMT900 Tahoe/Yukon Today?

89Suburban said:

So for some reason my Bose system is messed up, I only have sound coming from the a-pillar tweeters and the r/f front door panel and the sub in the console. No sound whatsoever on d/s front, 2nd row doors, or d-pillars in the back. Any thoughts from you audio guys? It is a stock non nav head unit. I think it has been like this for a while I am just getting into trying to diagnose. If it is not something simple I will rip out all the factory and go full aftermarket.

I did remove the rear audio control panel in the rear of the console. Don't know if that has something to do with it or not.

@mikez71 @j91z28d1 any thoughts?

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Sparksalot said:

Noticed the silver cracking on the rear view mirror in thecopcar.


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Charlie207 said:

Some jerkface broke into my car at our Airbnb over the weekend. They stole a few things like a high-end IFAK/first-aid kit and my freaking AutoCAL V3. I had just cut the foam out of an Apache 2800 case to hold the scanner and cables on Thursday, and wanted to bring the scanner with me because I flashed a new update tune Thurday night (basically a v2 of the 50lb injector tune, with some tweaks, and 91+ octane version & TCM tune) and loaded the v1 tune just in case there were any hiccups on our ~400 mile trip up through Maine, and back. (new tune works great, btw).

So, if anyone knows where a cheap, used, AutoCAL V3 can be sourced, and if I can mate the hardware to my tune files, that'd be great*. I emailed BBP about sourcing a replacement, and I'm going to reach out to my insurance to see how hard they laugh about covering the other stuff.

I bet they thought the Apache case was a gun or something.

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89Suburban said:

So for some reason my Bose system is messed up, I only have sound coming from the a-pillar tweeters and the r/f front door panel and the sub in the console. No sound whatsoever on d/s front, 2nd row doors, or d-pillars in the back. Any thoughts from you audio guys? It is a stock non nav head unit. I think it has been like this for a while I am just getting into trying to diagnose. If it is not something simple I will rip out all the factory and go full aftermarket.

I did remove the rear audio control panel in the rear of the console. Don't know if that has something to do with it or not.

@mikez71 @j91z28d1 any thoughts?

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j91z28d1 said:

I can probably look up the wiring diagram later if @mikez71 doesn't already have it handy. I've not been into mine, so I don't know what does what off the top of my head.


I wouldn't be surprised if the bose amp. gave up, on other cars when you have bose everything runs thru their stuff.

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mikez71 said:

Sorry I don't know about the rear panel and the audio,
Could be speakers/amp/headunit...

If the passenger front works, but not the driver... I would focus on driver front first
..since the rears could have something to do with the rear control panel..
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