Factory Bose Entertainment System: Radio Lights Up. No Sound

[Alberta Tahoe]

I see this has been been discussed more or less but not in the specific way I'm looking for so I'' ask another question.
Factory radio lights up as it should and has full functionality other than sound. So I know the fuse is good as it has power.
My question: Is there another fuse for an amplifier? Nothing in the service manual indicates there is other than a combined fuse/amp designation. Same with the online postings I've come across (here included).
Nothing has been messed with. It just quit.
Any insights?
Thanks in advance.

 

[Fless]

What year, make and model? Fuseboxes are different.

 

[Alberta Tahoe]

Forgot that part.
2006 Tahoe LT
LM7 Gas
4WD

 

[Fless]

There's a fuse for the amp in the underhood power center:

 

[Alberta Tahoe]

Thanks for that.
Without being at the truck at the moment to investigate, would you say that fuse is for the radio and amp, or just the amp?
If the latter, then that's probably the culprit.
As mentioned, the head unit still lights up.

 

[Fless]

There's another fuse labeled "Radio" very close to the Radio Amp fuse.

 

[Alberta Tahoe]

Awesome. Thanks.
I haven't had the opportunity to investigate but now this gives me a short track to listening to the news.
Thanks again.

 

[Alberta Tahoe]

Well, the fuses were quick and easy to find however they both appear in good shape.
I'll have to get out the multimeter and start troubleshooting.

 

[Doubeleive]

bose amp should be under the center console, those are sometimes known to go bad internally (develop bad solder) or have a poor connection at the harness connection
you can try smacking it a few times and see if it comes back to life but I am willing to bet it is the culprit, if so you can usually find a used replacement on ebay for pretty reasonable, part number has to match, does not require any kind of programming or anything. plug-n-pray.

 

[Alberta Tahoe]

Under the console?
Perhaps not coincidentally, the sunroof had been leaking for a while. As a result, the centre console/ glovebox ended up full of water. Wouldn't surprise me if some of that made its way to the amp.
More work...
Thanks.

 

[Doubeleive]

Under the console?
Perhaps not coincidentally, the sunroof had been leaking for a while. As a result, the centre console/ glovebox ended up full of water. Wouldn't surprise me if some of that made its way to the amp.
More work...
Thanks.

 

[TahoeLTZ2007]

Did you try unhooking the battery for 5 minutes then hook it back up? i think it reboots the bcm
That worked for me in the past.

 

[Alberta Tahoe]

I haven't done any further investigating but that one is certainly worth a try. Thanks.
It's dropped to 20 below here and with no longer having a shop to work in, maintenance gets a back seat until a break in the weather.

 

[TollKeeper]

With your key NOT in the ignition, door open, turn on your headlights. Do you get the Headlights On Dinger?

 

[Alberta Tahoe]

With your key NOT in the ignition, door open, turn on your headlights. Do you get the Headlights On Dinger?

Interestingly, I do NOT get a headlights on chime. Actually, I just tested this yesterday as I saw that when I returned to my truck after a quick dash into the store, the headlights were on. Seems to me there used to be an alarm and it struck me as odd as it didn't work.

 

[29tomt]

I see this has been been discussed more or less but not in the specific way I'm looking for so I'' ask another question.
Factory radio lights up as it should and has full functionality other than sound. So I know the fuse is good as it has power.
My question: Is there another fuse for an amplifier? Nothing in the service manual indicates there is other than a combined fuse/amp designation. Same with the online postings I've come across (here included).
Nothing has been messed with. It just quit.
Any insights?
Thanks in advance.

I have the same problem with a 2003 Tahoe with Bose. It has to do with temperature for some reason. I got another amp and plugged it in under console and got same results. I could care less about the radio as I play radio on my Iphone.. the issue would be that the chimes quit so if you leave your key in ignition, lights on etc, you get no warning. The other issue is that if you get the radio working and shut car off and forget about it next time you are driving, the thing kicks in a a kaboom and goes to playing and potentially causing you to wreck or wet your pants with your coffee. It is not a rare problem. I have read about them selling a bypass plug adapter for the amp but that involves a lot of wiring. etc.

 

[29tomt]

Since I replaced the amp with same results, I am guessing something going on in the radio head in the dash or one of many wiring connections. I am selling truck to my son and let him deal with it. I am too old to be messing with it any more.

 

[TollKeeper]

Interestingly, I do NOT get a headlights on chime. Actually, I just tested this yesterday as I saw that when I returned to my truck after a quick dash into the store, the headlights were on. Seems to me there used to be an alarm and it struck me as odd as it didn't work.

Were they on via the switch, or the Auto-Headlights feature? if switched on, then the dinger should have rung, if on the other way, no dinger would chime.

Sounds like the radio to me.

 

[Alberta Tahoe]

I switched the headlights on manually. No chime. This truck has its share of electrical gremlins.
I'm guessing the amp is toast.

 

[Rocket Man]

I switched the headlights on manually. No chime. This truck has its share of electrical gremlins.
I'm guessing the amp is toast.

If water got down in the center console, that’s most likely the issue. You’re probably looking at corrosion in the connectors at the amp, might have blown it but the fuse should have gone at the same time so you might get lucky and it’s just corrosion.