2002 Tahoe CD MP3 Installation

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=27401
Printed Date: July 21, 2025 at 6:03 PM

Topic: 2002 Tahoe CD MP3 Installation

Posted By: flavarite
Subject: 2002 Tahoe CD MP3 Installation
Date Posted: February 28, 2004 at 3:19 PM

Hey everyone! I have read through some of these forums and found them rather useful. I am trying to install a JVC KD-SH9750 (click to view) in my 2002 Tahoe. I'm having trouble with any sound output and have a feeling it has to do with some factory amp (I've read about this but not sure where it's at) or the OnStar that I have. I went to Metra's website and found that they have a "GENERAL MOTORS TRUCK "ON STAR" PRE-AMP HARNESS/199". I'm not sure if this is what I need to maintain the functionality of the OnStar or if it will also get my new CD player to work or what. The link to the wiring harness that I was looking at is HERE. But, before I knew this was going to be this hard I had bought a American International GWH-344 (click to view) wiring harness to install my deck. It powered own and some times sound could be heard but when I shut the ignition off and back on I could not hear anything. There is a second wiring plug that is smaller and I think it's for the tape deck or the audio controls for the second row in the center console. I have a couple questions around this installation:

Can someone help me out with the installation of this new CD player?
If I swap the factory deck does anyone know if the tape deck or the audio controlls in the center console will still function?
Does anyone have an electronic source or copy of the 2002 Tahoe Audio Wiring Diagram?
What is the smaller factory plug used for that plugs into the factory deck?
What is the wiring harness that I listed above from Metra's website used for? The description is vague and there is no picture to view.

Any help is much appreciated.:star:

Thanks

Replies:

Posted By: cbag1
Date Posted: February 29, 2004 at 3:27 AM

Radio 12v	orange	+	radio harness
Radio Ground	black	-	radio harness
Radio Ignition	dk. green	+	radio harness
Radio Illumination	brown	+	radio harness
Factory Amp Turn-on	orange	+	radio harness
Notes: The amplifier is behind the glove box.
Power Antenna	N/A
LF Speaker +/-	tan - gray	+,-	radio harness
RF Speaker +/-	lt. green - dk. green	+,-	radio harness
LR Speaker +/-	brown - yellow	+,-	radio harness
RR Speaker +/-	dk. blue - lt. blue	+,-	radio harness

Posted By: Metra Tech
Date Posted: February 29, 2004 at 10:37 AM

This is a very easy vehicle as long as you have the proper wiring harness. The On-Star piece you are referring to has no bearing on the factory amp and will not help you. What you need to do is bypass the amp and let the JVC's 50 watt per channel amp power the speakers. Use Metra part# 70-2027 amp bypass. Don't try looking for it on our site as we do have this piece, as with most specialty harness' on our web site. This will work as long as you do not have the Bose setup. If you do, we have an integration harness for that setup as well.

Posted By: flavarite
Date Posted: February 29, 2004 at 6:11 PM

Than you both for the reply. Metra Tech - You stated that I "should not try looking for it on your site". Where could I find this item since you have it. I do not have the Bose Setup either. I would be interested in finding out the price of this part and how I can purchase it.

Thanks again