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2021Trailblazer RS AWD Scarlet Red Metallic
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My guess would be behind the dash, but like you I can't find any info.
 

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Discussion Starter · #3 ·
In my 16 z71 it’s behind the dash. But I noticed in older models it’s in the rear. And on the new blazer it’s under the dash in the middle
 

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Yeah the old TrailBlazers had them inside one of the rear trim pieces. It seems like many of the newer GM vehicles have the amp inside the dash. I've looked inside the cargo trim and found a fuse box, but nothing else.
 

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Based on these diagrams the amp is located behind the dash. Part number 2 is the Bose amp.
465
 

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I wonder what the specs are on it. I looked on Bose site but doesn’t say anything
Bose doesn't like to post specs on their products. I've run into this problem before trying to find info on other Bose equipped vehicles.
 

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Discussion Starter · #8 ·
I was just curious. Doesn’t really matter it’s all coming out and being replaced. I just need the signal.
 

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If the Trailblazer audio system is anything like the Blazer you might have to disconnect the ANC system to prevent problems. ANC will try to cancel out noise that comes from non stock speakers, amp, subs, etc. ANC is only on AWD models.

I would try to make everything as "plug & play" as possible to avoid problems. Crutchfield has a few wiring harnesses that will integrate with the system.
 

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Discussion Starter · #10 ·
That’s what I did in my Colorado I have the amppro 4 in it along with a anc bypass. All plug n play. Just don’t know if they changed all the connectors
 

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Lucky guy, I wanted an RS but there were none that fit what I wanted within a 500 mile radius of Spokane. I got the LT with the meh "6" speaker system. I want to upgrade the speakers.
 

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Discussion Starter · #13 ·
Lucky guy, I wanted an RS but there were none that fit what I wanted within a 500 mile radius of Spokane. I got the LT with the meh "6" speaker system. I want to upgrade the speakers.
I got the activ but the Bose is not all that great. It’s all being replaced.
 

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I got the activ but the Bose is not all that great. It’s all being replaced.
Replace your stuff yet? I replaced my speakers already, they were trash in the non Bose system - 20 Watts. The amp btw is in the rear cargo area on the passenger side. I posted on the forum a PDF on how to access everything far as the audio system goes.
 

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Discussion Starter · #15 ·
Replace your stuff yet? I replaced my speakers already, they were trash in the non Bose system - 20 Watts. The amp btw is in the rear cargo area on the passenger side. I posted on the forum a PDF on how to access everything far as the audio system goes.
no not yet. I went to order the navtv unit and they are upgrading it so I have to wait till that’s available. I’m going big. Once it’s all done I’ll post pics
 

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Discussion Starter · #17 ·
Are you replacing your factory deck too?
no. Going to leave that. I have a company making me a h/o alternator. All 0 ga wire. Lithium battery, Down4SoundShop 6.5s for the doors. Sundown audio tweets. Sundown sfb500.4 for mids and highs 2 sundown x12s running off a sundown salt 4
 

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Replace your stuff yet? I replaced my speakers already, they were trash in the non Bose system - 20 Watts. The amp btw is in the rear cargo area on the passenger side. I posted on the forum a PDF on how to access everything far as the audio system goes.
Where abouts is the pdf! lol I need to unplug that damn ANC
 
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