SIR GM1 Install
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Joined: Sep 2005
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SIR GM1 Install
I have an 05 coupe and my wife got me the SIR GM1 for Christmas. I read where some of the cars may be prewired even if they did not come with XM from the factory. I looked inside the driver wheel well but did not see any wiring that looked like the pictures in some of the threads. The best I can tell mine is not prewired. If not where would the SIR GM1 plug into the back of the head unit it is NAV with single disc CD and could you access it without removing the console. Would it be possible to access it by removing the glove compartment. As always thanks ahead of time really appreciate any feed back. Would like to install in the glove box if possible looks like there would be less disassembly there not really sure.
Le Mans Master
Joined: Jun 2004
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From: Skippack PA
St Jude Donor '13
I have an 05 coupe and my wife got me the SIR GM1 for Christmas. I read where some of the cars may be prewired even if they did not come with XM from the factory. I looked inside the driver wheel well but did not see any wiring that looked like the pictures in some of the threads. The best I can tell mine is not prewired. If not where would the SIR GM1 plug into the back of the head unit it is NAV with single disc CD and could you access it without removing the console. Would it be possible to access it by removing the glove compartment. As always thanks ahead of time really appreciate any feed back. Would like to install in the glove box if possible looks like there would be less disassembly there not really sure.
Le Mans Master
Joined: Jun 2004
Posts: 9,289
Likes: 16
From: Skippack PA
St Jude Donor '13
Guessing only because I've never used one, but it *should.* The SIR-GM1 is designed to look just like the XM box to the stereo as far as control goes so they should be interchangable. However that doesn't mean there isn't some goofy software issue that might interfere. But best I can do is guess based on logic and that guess is yes, it'll work.
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Joined: Sep 2005
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Thanks Komoman, I was hoping if not prewired there would be a plug in the back of the head unit and i would try to mount it in the dash somewhere. I don't have a multidisc changer just a single with NAV. Thanks again guess will have to try something else.
Burning Brakes
Joined: May 2007
Posts: 1,171
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From: Columbia Maryland
If you have the NAV, I'm pretty sure that the wiring harness is there somewhere. It might be tucked in somewhere, so I would suggest pulling the carpet on drivers side completely back. The harness is **suppose** to be located just behind the wheel well on the drivers side, but the installers could have left it hanging anywhere in that area.
