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

[j91z28d1]

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?

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.

 

[mikez71]

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..

 

[Doubeleive]

ordered new wiper blades these do not last for years but they do not lift even at 130mph (confirmed) and they are cheap a comparable set of bosch is like $50+ at the store
I have thought about switching to the ppv wiper arms but they stick out a lot

 

[j91z28d1]

if you pop the end off those with a small flat head you can replace just the rubber. ebay has it, it works well. I get 25in so it covers all my cars and a 6 pack is like 3.99$


I started doing it after I was an hour front home walked in a parts store and it was 50$ for two 25in wipers. like nope, drove home with bad wipers haha.

 

[Sparksalot]

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

 

[Tahoe14]

Salvage yard trip.

 

[Doubeleive]

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


View attachment 441348

at least that's a easy cheap fix, just takes a Allen wrench

 

[Charlie207]

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.

 

[89Suburban]

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.

Bastards!!!

 

[89Suburban]

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?

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.

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..
View attachment 441340

View attachment 441341

@kbuskill thoughts?

 

[Doubeleive]

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.

worth every penny, pair with a glass break sensor, tilt sensor, smart start pro and you get text alert, email alert, app alert, gps tracking, digital fence and worldwide coverage.
hell if you don't have kids running around all the time you can add a motion sensor and know if anyone even walked by it.
I added a big flashing multi led inside so if anyone looks in the window they will know it has a alarm and that alone is likely to send them off to easier prey.
got tired of having my shit stolen left & right. Haven't had a break in since. been at least 15 years or more. I did have the rear hatch glass shot with a bb gun, alarm went off and they skittered or it was just random kids ******* around. Have this on all 3 vehicles, had it on the previous 3 as well. the motion sensor can be a real pita if you have kids though.

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[Doubeleive]

@kbuskill thoughts?

so, you pulled out the rear ac control and there is a just a hole there now?

 

[89Suburban]

so, you pulled out the rear ac control and there is a just a hole there now?

No I put a dummy panel in it. Somebody told me if you install the headphones in that jack on that panel it cuts off all the rear speakers? So n that case it would do the same if that whole panel was unplugged I guess? I never messed with the rear panel.

 

[mikez71]

I would think that the panel unplugged *should* be like headphones unplugged as well..

The front tweeters are connected to the front speakers.
So if your left tweeter works but not your speaker, then maybe the speaker is bad or the connector/wiring is loose.

 

[89Suburban]

I would think that the panel unplugged *should* be like headphones unplugged as well..

The front tweeters are connected to the front speakers.
So if your left tweeter works but not your speaker, then maybe the speaker is bad or the connector/wiring is loose.

Is it possible to jimmy wire it at the plugs for it to bypass it? Just to get the rear speakers working? Or does it have something to do with powering things up? I'm ready to say fk it and run a stand alone harness and bypass all this b/s.

 

[mikez71]

maybe.. your rear audio does need jumping..

Looks like it is between the radio and amp for the rear speakers..

 

[Doubeleive]

I would think that the panel unplugged *should* be like headphones unplugged as well..

The front tweeters are connected to the front speakers.
So if your left tweeter works but not your speaker, then maybe the speaker is bad or the connector/wiring is loose.

are you sure? on the gmt800's it was that way but on these trucks the pillar speakers have there own wiring
on the 800's the tweeter was in the door panel and the wire just extended up to the tweeter with a tiny filter soldered to the backside.

 

[Doubeleive]

No I put a dummy panel in it. Somebody told me if you install the headphones in that jack on that panel it cuts off all the rear speakers? So n that case it would do the same if that whole panel was unplugged I guess? I never messed with the rear panel.

I could be wrong but I think that rear control has to be connected or you loose the rear speakers, not sure about the front door speakers though.
search way back on the forum this has come up before but it's been a good while

 

[Doubeleive]

maybe.. your rear audio does need jumping..

View attachment 441507

Looks like it is between the radio and amp for the rear speakers..

why is this only showing 4 channels? I would think these have a minimum of 5, my denali has 10 or 10 speakers anyway

 

[mikez71]

are you sure? on the gmt800's it was that way but on these trucks the pillar speakers have there own wiring
on the 800's the tweeter was in the door panel and the wire just extended up to the tweeter with a tiny filter soldered to the backside.

Looks like the door speakers connect in parallel on the tweeter connector.
Also looks like you can check for signal to the doors in the dash end fuse panels..