Is that the only part I need? I noticed on the site: http://www.audiowarehouse.peachhost.com/ct_PR34080345.htm

that if the vehicle isnt listed, you will need several other parts too. this is a 2004 avalanche and I don't see it listed.

Besides the obvious appearance of the interface and the fact that it comes with the harness attached, what is the difference between the basic functions of the PAC C2A-GM24 and the PAC SNI-35?

Now: for those of you who have replied to my previous posts about the 2004 Avalanche, I am not ignoring what you stated. It's just that the more that I look at a picture of the GM24, the more it looks like an SNI-35 simply tapped into the audio output leads of the radio before the signal hits the factory amp.

Both modules appear to be adjustable and have the RCA outputs and speaker level inputs. It seems that you could just mimic the GM24 with an SNI-35 by tapping into the factory audio leads right behind the radio.

Someone had said when I commented on tapping at the speaker to get a signal for an SNI-35 (for the purpose of adding a sub amp to a 2004 Avalanche) that if I did that, I would get a signal with no low frequencies. That seems logical however, b/c the signal has already been processed by the Bose amp which I would think would no doubt have crossover protection built in. Shouldn't the signal from the radio however, be full range?

I need to know what the wiring diagram is for a 2004 Avalanche with Bose. Our database here on the site doesn’t have it.

Any takers?

Well, as a lot of you can see, I have posted many time about the 2004 Avalanche and about whether an PAC SNI-35 will work in the place of the PAC C2A-GM24 interface when you want to add an sub amplifier to a factory Bose system. It occurred to me (as most often the case) that I could try to call PAC about this and see what they think. So, I did… and the result is surprising! Just as in the days of old when you had to add an amp to a 1991 Cadillac, the same thing will work here. Instead of buying that $75 to $120 harness to do the job, you can do it now with a $15 SNI-35, tapping into the audio leads behind the radio, before they get to the amp… or so the guy at the PAC tech support told me (1-800-854-3133 for PAC and tell the lady you have a tech question).

So, I hope this helps others as it did for me. I will post the results of my work after I do it tomorrow. Now, if I can only get some wiring colors!

The $15 one sounds fine. I think the overly expensive one I showed you was just if you didnt want to cut up your factory wiring harness.

The $15 one you mentioned sounds fine. I think the one that was overly priced was just for people who dont want to cut up thier factory wiring harness like you said.