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Install Garage & Help Desk You've got the radio, now which cable goes where? Got questions about factory installed radios in your car? Ask any installation or help questions here and someone will get to you soon.

 
 
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Old 01-23-2005, 05:03 PM   #1
gueido
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Default Install: 2003 Chevrolet Tahoe w/factory Head unit

I've just completed the installation (conversion) of a 2003 Tahoe from XM
to Sirius using the Kenwood KTC-SR903 and Soundgate KNGM1-V3.
Everything is fairly straighfoward, with the exception of disabling factory
XM, so here is how to do everything.

This should also work for many other GM vehicles, including Chevrolet Tahoe, Chevrolet Suburban, Chevrolet Silverado, Chevrolet Trail Blazer, GMC Yukon, GMC Yukon Denali, GMC Yukon XL.

1. TAPE UP (OR COVER) AIR CONDITIONER CONTROLS:
I didn't do this step, and now I'm sorry (see picture below for some pretty
scratches). Instead, you could just pull the AC unit out (what a pain).

2. INSTALL SOUNDGATE KNGM:
Pull the dash apart, then install the Soundgate KNGM as the instructions
say. You can splice into the ground wire on the long factory harness.
You SHOULD NOT splice into the power on the harness, as it can cause the
computer to do strange things. Instead, run a wire to the fuse box and
connect there.

One thing: there will be a 12-pin plug that you will unplug from the factory
headunit, in order to plug the Soundgate 12-pin plug in its place. Make
SURE you plug the factory 12-pin adapter into the other end of the
Soundgate.



Place the soundgate in the back left cubbie-hole (see pic), then plug the
LONG cable that came with the Kenwood (ends have round plug) into the
soundgate and run the cable through the left cubbie-hole down behind the
console (from the drivers side). There is a convenient location to store
that big Kenwood tuner: behind the center console, there is an opening
barely large enough to fit the tuner in. (see pic). After running the Kenwood cable, you can put the dash back together (if you're brave).



3. INSTALL ANTENNA:
Simple here. Put antenna wherever you like and run the cable back to where the tuner is located (behind console).




4. INSTALL KENWOOD TUNER:
Wires should already be in the right location, so just plug them into the tuner, and stuff the tuner behind the console. (see pic)




5. DISABLE XM (if your vehicle came with factory XM installed):
Open the glove box. On the right side, you'll see that the glove box is held by a small tab. Press the tab to the left, and the glove box should drop, giving you access to the factory XM tuner. (see pic)



There are two cables plugged into the XM tuner: on bottom is the antenna; top is power, sound, data (the BUSINESS). You must unplug the plug on the top, which is a little tricky.

First, pull the blue tab out.



Now, reach on the back side of the plug (where the blue tab is) and squeeze, which will free the plug:



Since this is easier if you can see how the plug is constructed, here are some more pics:









Finally, leave the plug hanging, and you're done!




If you run into something I haven't covered here, please let me know so I can add it.
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Old 01-23-2005, 06:26 PM   #2
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Good write up.
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Old 01-23-2005, 10:07 PM   #3
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Great job, thanks for the documentation.
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Old 01-23-2005, 11:48 PM   #4
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Did it in my Silverado a few months ago. I pulled out my cup holder thiny in the console and double sided taped the receiver to the bottom. Used the good 3M stuff and it hasn't budged yet. Also I made the mistake of using the ground off of the cig lighter. Do not do that, Your Soundgate thing will do some strange stuff. According to them it is not a good enough ground. The posative from the cig lighter is OK, and keeps you from having to tap into the fuse panel.
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Old 04-01-2005, 07:34 AM   #5
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I have a 2004 Yukon and considering a similar install. I have a few questions regarding this:
>The last time I checked the Soundgate Adapter was the kenwood "7V" series($115). Any idea what the difference is?
>Do you still have control and function of the rest of the radio including the 6 disc changer?
>Which kenwood tuner will do the job?
>Can the XM antenna be used? If not is it beacuse of reception or the wiring harness?
>Are there any clips on the dash that need to be replaced once the dash is initially removed?

Any info on the above would be much appreciated.
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Old 04-03-2005, 06:42 PM   #6
HarleyJoel
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Thanks for the great review. I had no idea you could install the tuner to work with the factory HU. Any chance of using the factory antenna? I know someone who switched from XM recently and was able to use his XM antenna without problems.
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Old 04-04-2005, 01:07 AM   #7
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blackdog (is that a reference to Zeppelin?):

I'm not familiar with the "7V" type of Soundgate adapter you're referring to. Maybe you're referring to V7, as in version 7 of the KNGM1. If so, I've never used it, but logjamelectronics.com claims the KNGM1V7 will work with the new SIR-KEN1 SiriusConnect unit.

My 6-disk changer is inside the headunit, and yes, I have full control of it. The only thing I lost control of was the factory XM.

I used the Kenwood KTC-SR903, which I think has been replaced with the SiriusConnect unit (SIR-KEN1).

I tried to use the XM antenna, but the plug wouldn't fit (harnesses didn't match). Also, the factory XM antenna for 2003 GM vehicles has two connections: one for sat signal, one for terrestrial (the SIR-KEN1 and KTC-SR903 have one antenna connection). It may work, but I don't believe its worth the effort and money. I actually didn't like the Sirius antenna on the front of my Tahoe, so I moved it to the back, above the brake light. You cannot see it on the roof now. I'll take some pics of it if you'd like; just let me know.

I didn't have to replace any clips on the dash, but I was very careful.



HarleyJoel, hopefully I've answered your question too; if not, feel free to post again.
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Old 04-04-2005, 06:37 PM   #8
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I was asking because I thought of using the XM antenna. I had to do the same thing in my Avalanche, I put the antenna behind the roof-rack close to the rear brake light and you can't notice it unless you look for it.
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Old 04-08-2005, 07:43 PM   #9
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Default XM to SIRIUS

Good Evening,
I was looking through the various posts about changing from XM to Sirius. I have a 2004 Avalanche with the factory Bose system incl. CD changer and was wondering if those of you that have made the change do you still have a CD changer that works? Soundgate told me that the CD would have to be disconected...... Thanks
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Old 05-20-2005, 12:24 AM   #10
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Blackdog is a reference for my two black labs.

Regarding the installation, from the pics I take it that all the access happens through the front of the dash not underneath. If this is the cast is it just a matter of pulling the dash "frame" out of the clips?

Did you need to replace any of the clips or did it all go back together nicely?

I did receive an e-mail from Logjam and the 7 series is the latest.

Regarding the antenna I can't believe someone hasn't developed a pin adapter. Crutchfield must have hundreds of them if you buy a replacement headunit for practically any car.

I also have the antenna mounted on the back of my Ford Explorer with the wire running underneath of the headliner. I was just hoping to untilize as much of the factory GM equipment as possible.
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Old 05-21-2005, 01:08 PM   #11
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>Regarding the installation, from the pics I take it that all the access
>happens through the front of the dash not underneath. If this is the cast
>is it just a matter of pulling the dash "frame" out of the clips?

Correct. You usually have to put the car in the lowest gear (1) and move the steering column as far down as it will go; otherwise the dash may not want to come out.

>Did you need to replace any of the clips or did it all go back together
>nicely?

As long as you're careful, you shouldn't have to replace any clips. If you do need more clips, visit your local GM dealer; they are pretty cheap.

>Regarding the antenna I can't believe someone hasn't developed a pin
>adapter. Crutchfield must have hundreds of them if you buy a
>replacement headunit for practically any car.

I've been told that XM and Sirius' antennae are using different technologies, so its more than just matching up wires. Maybe someone else can clarify this...
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Old 06-01-2005, 07:23 PM   #12
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Hey great pics and instructions! Did a similar install in an 05 silverado, but Im getting weird humming electrical type noise(not very noticeable until the sound is turned up fairly loud) in the speakers when using the sirius. I have heard it could be "alternator noise", as the noise becomes more noticable at higher speeds. Could I have a bad ground? Where have some of you grounded your adapters at? Mine is ground near the parking brake area on the left side, on the metal of course.
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Old 06-02-2005, 01:56 AM   #13
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THIS IS A GREAT THREAD.... and thanks for taking the time to post all of this info!!!...

so, my question is - for a technically challenged(ie: clueless idiot, lol) person like myself with a GM Truck(05 Escalade)

i'd like to buy the parts needed, and then take them to a professional installer...

that being said, i need to order(?):

1. soundgate adapter?
2. kenwood sirius tuner?

is that all?

also:

1. how is the sound quality on your newly installed Sirius Tahoe setup?(is it similar to the quality of the xm that you had previously?)
2. does the stock GM/Bose head unit display the stream numbers/names???... (ex: 26 - alt nation?)
3. can this setup work with an iPod too?... and if so, does anyone know what other parts would need to be ordered to have a directly wired connection for an iPod?(no wireless transmitters)

Any advice/suggestions would be greatly appreciated...
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Old 06-02-2005, 02:16 AM   #14
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My setup is similar to what you are asking. I have bose/onstar/(had xm factory installed option) and I had to buy two adapters from soundgate to get sirius, and add an aux input for my Ipod. The adapters I bought were the SDSGM2, and the KNGM1v7 from soundgate. You also have to buy the tuner seperately(sir-ken1) that hooks into the soundgate KNGM1v7 adapter. Basically the way it works is, the aux input adapter(SDSGM2) splits the port on the back of the factory radio, to allow you to hook up any devices with rca cables, and allows you to connect the sirius adapter(KNGM1v7), and you can switch back and forth by flipping a switch. The sirius adapter is pretty cool, it displays the sirius stations/song/etc.. and functions just like the XM factory radio, except its Sirius!! The sound quality is good, except for my issue i posted above with the slight electronic humming type noise. I did the install myself, not professionally which is probably why I am having that issue. Other than that I am happy with the setup, and like being able to listen to Sirius, and switch over to my ipod whenever i like. You mentioned you had an escalade, you may want to check with soundgate tech support to see if those adapters work with cadillac, because I kind of recall reading somewhere that cadillac has some other computer issues that you may need to know??
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Old 06-02-2005, 10:28 AM   #15
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Quote:
Originally Posted by tanos2k
My setup is similar to what you are asking. I have bose/onstar/(had xm factory installed option) and I had to buy two adapters from soundgate to get sirius, and add an aux input for my Ipod. The adapters I bought were the SDSGM2, and the KNGM1v7 from soundgate. You also have to buy the tuner seperately(sir-ken1) that hooks into the soundgate KNGM1v7 adapter. Basically the way it works is, the aux input adapter(SDSGM2) splits the port on the back of the factory radio, to allow you to hook up any devices with rca cables, and allows you to connect the sirius adapter(KNGM1v7), and you can switch back and forth by flipping a switch. The sirius adapter is pretty cool, it displays the sirius stations/song/etc.. and functions just like the XM factory radio, except its Sirius!! The sound quality is good, except for my issue i posted above with the slight electronic humming type noise. I did the install myself, not professionally which is probably why I am having that issue. Other than that I am happy with the setup, and like being able to listen to Sirius, and switch over to my ipod whenever i like. You mentioned you had an escalade, you may want to check with soundgate tech support to see if those adapters work with cadillac, because I kind of recall reading somewhere that cadillac has some other computer issues that you may need to know??
Thanks so much!.... your advice is greatly appreciated, and i will check with the folks at soundgate re the cadillac issue.

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