How do i install factory Xm in my 08? i have searched and searched but am just getting nowhere. Someone please help!!!!! tell me what i need. i dont want the external radio that sit in the cubby. i want it like the factory option. thank in advance

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I installed it in my 04 and now doing it to my replacement 06, you need the reciever, onstar antenna with xm, antenna cable, and connector for xm reciever, also theres a bracket to mount the xm reciever on the left rear wheel well.
I will post some diagrams and part numbers within the next day after work.

ok id appreciate it thank you. do u happen to have part numbers by chance?

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Heres what most of the install consist of, if you want to do it neatly and with the same specs at the factory like i did you will want to remove the seats and the rug...
The XM module mounts in the left rear of the trunk behind the carpeting and the wiring follows the harness on the left side up until the seats, it then crosses over under both seats to the right side of the car and then finnaly it ends at connector C200(the white connector you see sttacthed to the metal when you remove the passenger fuse cover on the dash) which i have got pinouts for. After that connector the wiring from there to the radio is already in the vehicle.

If you can get to a salvage grand prix and pick your own stuff that will help you alot, If you take the time to remove stuff to get to the harness you can open it up and get the wiring from the sattelite radio to the dash connector c200 you will want to do this to make it easier instead of having to do up your own harness( There are four wires that MUST be shielded or you will get interference these are the drain wire, right audio, left audio, and common) if you must run your own wires you will have to shield them with aluminum foil and wrape them in electrical tape to secure the foil.
The pins from c200 are removable by un cliping part of the connector and unlatching the pins from the connector(this way you dont have to cut and splice instead of using the connector).

From the module you have 7 wires.
The drain wire(which is bare with no insulation), the right, left, and common are all wrapped in the same foil shield and go directly from the XM module to the connector c200...this completes the audio part.

You are now left with a; ground, battery positive, class 2 data wire.

For these connections i made along the floor at the beginning and behing the front passenger door,
The ground I spliced in to one of the ground wires that go to the ground screw beside the floor just below the door.
The battery positive I spliced into the wire going to the keyless entry module in the back, this is an orange wire but more then one so you have to test and retest with the RFA fuse removed to make sure you have the right one.
Now the class2 data wire is what allows the module communicate with the headunit and other things in the vehicle. this data wire is spliced in the the blue class 2 wire wire going to the Airbag module(same as if from the factory). It will be the only blue untwisted wire going to the module however open up the harness going right up the this module so you can be sure you wont splice in the blue wire for the passenger seat connector as they look the same.
Make sure all the connections are soldered and well insulated that they wont short out againts anything in the future.
Also I choose to run all the wires inside my current harness amongst everything else rather then have them run outside the covering, with the exception of the antenna cable which I ran from the box to the roof antenna along the harness with ties every foot.
I have done this to my 04 which was recently smashed and now to my 06 just 4 days ago.


You need the;

XM Module (10367164)
Xm module mounting bracket (Part number unknown)
Antenna cable (i got mine from a G6 number unknown)
XM module connector
Onstar antenna with XM(will have three wires instead of 2)(25775255)


What I do not know as of right now but will soon know in a few days time is the theft lock on the xm module, I bought mine new from ebay and was never used so upon installing it in my 04 it learned the vin on the first ignition cycle, but now after installing it in my 06 it knows the vin is differenct and displays XM LOCKED. It will have to be unlocked with the tech2 but im just wondering if they store that first vin peramantly and are a once and done deal or if they can be reprogrammed and setup with a new vin...I will find this out shortly and post back.

If anyone has any questions feel free to ask as it is fresh in my memory being just a few days ago.

-- Mon Mar 08, 2010 11:46 pm --

Here are some diagrams and conector views as well including the c200 connector.

jesus this is what is have been looking for all along. so will the radio ID just pop up on my radio? and i forgot to say that i have monsoon will that make a difference?

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Yup the headunit will recognize it as if it were factory, I think you go to channel 0 or something to view the radio id, and monsoon or not it is all the same for the xm part.

ok. well i opened the fuse panel and looked at the C200 connector and it has something connected to it?

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Yup this connector is shared with other things like the rear abs sensors and onstar(mirror for buttons and microphone) and there something connected to it.
The pdf i posted on the c200 will show which wires are for what, you will notice on one side you will have four wires where the oposite side you wont have any, the side where there are no wires is where your xm wires will go in to connect with the wires on the other side that go right to your deck.
If you get the wiring from a wrecked prix and get the connector pins too without cutting it they will slide into the blank spots on the connector.
Let me know what you find.

oh ok i totally understand now. thank you now i just have to gather the parts

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An update on the XM theftlock, Went to the dealer today to get the cars vin programmed into the xm reciever and had no luck so they are calling some places to figure it out and will post the outcome and if good how exactly it is done so everyone knows what to tell the dealer what has to be done,lol

alright excellent thank you. i think that this should be stickied. I love factory verse the ones you get at best buy. they just stick out

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Plus around here I know of people that had theirs stolen, they see them and break in just to take them.

I was just thinking too when you go to get the parts make sure they are from an 06 and higher, the reason is the 04,05s had two wires going to the antenna which is seperate from the onstar where as the 06 and up are all in one onstar antenna.

did u ever get it figured out about reprograming the module?

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Just ordered a new module this morning, for 160 somewhat dollars, I brought the car into an AC/Delco shop with a tech 2 with subscription and could not do it, called gm techline and found out that upon installing either at the factory or anywhere on the first ignition cycle they learn the vin and cannot be relearned after that.
I got lucky and got that new one from ebay for like maybe 30 bucks, put it in my 04 and learned the vin automatically after the first start, then smashed the car a month later and now its a useless box.

Even still 160 is not bad considering it is factory and works extremely well, And the antenna and wiring should not be very much at the scrap yard, mine I got for 50 canadian.

I will post the part number when I recieve the module, should be in thursday.

• XM Module (#7 in figure): P/N: 10367164
  
• XM Module Bracket (#5 in figure): P/N: 10346659. The bracket comes with the three nuts (#4 in figure).
  
• Nuts for the bracket (#3 in figure): P/N: 11518149. You need two.
  
• Antenna Cable (#8 in figure): P/N: 15217160. I don't know how the G6 one worked since it's a Grand Prix-only part number.
  
• OnStar antenna (all-in-one antenna for 2006+ a.k.a. 2nd design - #1 in figure): P/N: 25773730

I believe that all that needs to be done is to connect the cable up to the antenna. The cable itself seems to provide a Y function at the antenna end, thus enabling communication to the head unit. This is all that is mentioned with respect to satellite radio (or U2K) in the service manual.

I'm in the process of getting this done (XM to stock NAV) and will post a write-up eventually.

-- Thu Mar 18, 2010 4:15 pm --

I stand corrected.

There is some communication going on with the body wiring harness (expensive!)

Just got the XM module today, and is part number 20890292...there were something like two part numbers for previous versions of this module and this is the latest one(had a manufacture date on it early february of this year), however as long as they are new and never been installed in a vehicle they will work as long as they are a part number designated for an 06-08 grand prix. The 04 and 05 modules had the old style antennas like gxp25 mentioned and they have two coaxial antenna cables going to the reciever vs the one.
right after i got the module i plugged it in, cycled the ignition and everything works perfect.

For the above with the antenna cable the ends are the same, however depending on size if one is an inch or two shorter or longer this would create a different part number, but i had no problem with it reaching so with only g6's and cobalts in the yard that had xm at the time I took a chance and it was perfect, however the cobalt would be way to short since it goes from under the back window to the back of the roof, vs the front on the g6.

I agree. I completely forgot that part numbers will change for trivial things like cable lengths.

At any rate, michaelbm, I would need some of your help in this matter.

Could you possibly look up information for my 2006 GXP when it comes to the communication (class2 IIRC) aspect.

I somewhat read your post above, but I think my vehicle may be a little different due to having the factory NAV (US4) and the 9 speaker Monsoon system (U88).

Here are some pics from another 2006 GXP with NAV:







-- Fri Mar 19, 2010 10:56 am --



Let me get this straight:

To connect the four (4) audio wires (c200 connector.pdf - Drain Wire, Left Audio Signal, Right Audio Signal, Audio Common) from the XM module, I would need to splice into the wires on the body harness near the connector C200 (174936-1) by the passenger fuse box? Three (3) of those four (4) wires need to be shielded and one doesn't (Drain Wire, which is bare). On that note, I guess I wouldn't really need to run the Drain Wire all the way up there since it doesn't need to be shielded. And by "Bare," am I to assume it's an exposed set of twisted wire?

Now by shielded, would it be okay to use "normal" multi-stranded insulated wire (~18 gauge) and wrap it in Aluminum foil and then wrap it in black electrical tape?

Now for the final three (3) wires (Ground, Class 2 Serial Data, Battery Positive Voltage), I would like a little more information, specifically pictures or better locations of the devices.

• Ground - I've seen a ground screw in the engine compartment, so I've got an idea what one looks like. I'd just like an idea where the one you mentioned is located [exactly].
  
• Class 2 Serial Data - Where is the airbag module located?
  
• Battery Positive Voltage - Where is the keyless entry module located?

Any more help would be much appreciated. Maybe some diagrams and pictures.

-- Fri Mar 19, 2010 5:55 pm --

michaelbm, I've got a little problem:

I was comparing my connector earlier and I have five wire differences. I was comparing mine to the PDF (c200 connector.pdf) you attached earlier.

Mine | PDF:

Pin #8: WH/BK | Not Used

Pin #9: L-Purple | RD

Pin #11: RD | D-GN/WH

Pin #13: WH/BK (looks off-white) | YE/BK

Pin #16: D-GN/WH | Not Used

Or does it really not matter since pins #17, 18, 19, and 20 match? I just want to make sure it's right before I start splicing.

EDIT: Added the correct C200 connector for my vehicle.

I will be getting home around sunday afternoon-evening and will try to get some pictures of where everything is, and see about that connector.
the keyless entry module is located on the deck below the rear window, the airbag module is under the rug under the passenger seat, and the ground screw i used is just a head of that side on the side below the door(will try to get a pic to better explain) the exact location.
For the keyless entry positive it is much easier and neater to catch it up front around where the airbag module is along with the class 2.

As for the shielding the drain wire is a bare wire, used a regular one with the insulation stripped and is wrapped in the foil along with the audio common, right and left. not sure how this eliminates interference but there must be a reason why gm did it this way as well.

I will get a pic of the connector c200 sowing which end goes to the dash and which one leads to the back as well.

-- Sun Mar 21, 2010 3:02 am --

Was just thinking i still have a harness from my 04 kicking around I can take some pictures for reference of where you will want to splice these wires in, will get back to everyone.

Thanks for the reply.

I was actually at a junk yard yesterday and I got to dig into a 2006 G6 sedan (Z69) with XM. However, this had XM but no OnStar, therefore, it had the flat XM antenna in the front.

I managed to remove the antenna and locate the XM box (passenger side underneath the rear window). Unfortunately, the entire right side of the vehicle was smashed in, so I was unable to properly inspect/remove the body harness. From what little information I was able to gather, yes, all four of the wires are wrapped in [blue] foil and the bare wire (one of the four) is encased in a semi clear plastic/rubber tubing.

Of course, the digital receiver connector pinouts were different but I got somewhat of a decent idea of how it's all connected.

The problem I have is that I already have the four wires (17, 18, 19, 20 - Drain, Left, Right, Audio Common) connected into my C200 connector. No, they're not shielded, but I'd like to get some kind of idea where they run to. Are they running to the OnStar module/receiver located under the passenger seat (I think that's where it's located)?

I'm anxiously waiting for more information from you!

And with respect to the locked XM receiver: The general consensus is that it needs to be reprogrammed with the vehicle's VIN.

http://forums.corvetteforum.com/1556692427-post2.html

There also seems to be a "three strikes you're out" deal with the modules. See the bottom of the link.

http://forums.corvetteforum.com/c6-tech ... stion.html

And here's some information on a "Master Corvette Mechanic" who could probably facilitate the module reprogramming. The thread is from 2006, so I'm not too sure if the guy still works at the dealership.

http://forums.corvetteforum.com/c6-tech ... ion-2.html

EDIT: My C200 connector.

I have the mysteriious pin 16 wire in mine as well, but wasnt sure whats its for, however these other wires taking up the space is really strange, looked at the connector view c200 for gxp model and still no reason for them to be there...Does the tape look like it was cut or anything at on time possibly?
The only wires for onstart would be the ones that show ue1 and are the ones that go from the mirror to the module, goes from windshied to the back down the piller and up front through this connector and then to the module in the dash for onstar just above the console(youd see it getting under the dash and looking behid the cubby hole under the climate control...Will look into possiblitles why these wires could be in those places shortly.

I'll take a look later today (Monday) to see if it looks like it's been cut. I'll also unsheathe it a bit to see if wires 17-20 are insulated (after getting an idea of how they look like in the G6).

Wires 11-14 are for OnStar yet my wire 11 and 13 do not match in color. I will check my mirror harness to confirm that at least the colors from C200 match those of the mirror connector. Hopefully a factory faux pas.

Also thought to mention unless your aware already but the side with the purple covering is the one that goes to the back portion of the car, and the one with the black covering is what goes to the dash harness which SHOULD have the wires from there to the head unit unless that is mixed up as well.

looking at the pictures it kind of looks as if those wires stealing the place of the xm radio are sort of out of place with the rest of the other wires, If you look on the c200 connector view pdf, the connector on the top left is the one with purple wire covering and goes to the rear section of the car and if you unplug them and compare to the one on the paper is it definetly the pin 20 and the next three to the left that are taken already?

Are you the first owner of the car, if not any idea who may have had it?, Just seems wierd due to the idea I installed xm in my last grand prix and my current 06 so im thinking someone may have added something and simply used those emtpy spots. Is it possible that there is a plug in the left of the trunk behind the carpet already there for an xm module?

If your car has side airbags they could have included the plug already since that section of the harness only changes for certain options for example.

One harness would be;
base: regular sound,Onstar (weather equipped or not this body harness always has the connectors and such), no side airbags, no monsoon
uplevel: premium sound,Onstart (whether equpped or not again has the connectors present already for body harness) if ordered would have xm wiring thrown in as well
Top:premium sound, side airbags, and most likley they would have said as soon as the harness gets side airbag wiring include the xm connector as well.

This is just a theory but my 04 was not prewired for heads up display (until I swapped harneses), however since my 06 has onstar, premium sound, and abs I noticed when I installed dual climate that it had the connectors for heads up display as well in the dash harness.

Just wondering as well is yours a canadian model or american? It beats me why gxp didnt include xm to begin with...

Interesting. I thought the black side was the side that is connected to the body harness and that the pink/purple side was going to the dash harness. With that said, that could explain those mismatched wire colors, etc. I will check this out tomorrow. Any easy way to disconnect those connectors?



I looked at the c200 connector.pdf when I took that picture and noticed that my wires weren't matching up with connector 174952-1 (left connector). So by looking at the second connector, 174936-1, the main wire positions matched up better to the pin numbers.

So, to get this straight, the wires facing the camera with the black sheathing is the right connector (174936-1) interconnecting with the left connector (174952-1) which is connected to the pink/purple tape, thus becoming C200 as a whole?

But if you look carefully in my picture, pins #17-20 (top right most wires in the picture) are the correct color. Counting down: 20, 19, 18, and 17 (which is bare). And no, I have not disconnected them to check/verify. I will do this tomorrow to see if those four are bundled together and shielded.



I am the second owner. I think my issue was with the confusion of the connectors. I believe I've got them straight now and will take a look tomorrow. I have checked the trunk where the module would be but I did not find a plug. I will take a picture of that are and post it tomorrow (maybe even later tonight).



If by "side airbags" you mean the roof mounted ones, then no, I do not have them.

My car is the American model (speedometer maxed out at "160" versus "220"). And I am also baffled that you could order the car with NAV (RPO US4) yet opt out of XM (RPO U2K).

-- Tue Mar 23, 2010 12:07 am --

Above the driver rear wheel well:









-- Tue Mar 23, 2010 7:39 pm --

I briefly checked around the pink/purple area about 25 minutes ago. Yes, that blue foil is there. I didn't have much time to unsheathe the tape to verify the pin locations but this is a good sign I guess.

Now I just have to find out where that "hidden" XM connector is at, if it exists...

I stand corrected. *sigh*



It looks like I do not have any of those four wires (17, 18, 19, 20) in my body harness. What looks shielded is the other bare wire (pin #7).

I still don't understand why I/we have a wire in pin #16 and why some of my wires are of different colors. But oh well, this should be a very interesting install.

Now thats all sorted out I will get some pictures taken of the 04 harness i have kicking around of where the class two and power connections should all be made and should be all good to go, Im going to try to find out what that extra wire in pin 16 may possibly be, Only guess I can make is for an autodim mirror or homelink that the grand prixs never recieved...
And on the oppisite plug you should have wires that go to these empty pins for xm, One thing i did to make the install neater was dissssembled the c200 connector from my 04 harness I had laying around and used these individual pins along with the attached lenght of wires and put them in the c200 on my 06, this way you would never tell it was installed outside of the factory.
I will Include pictures of how to do this as well when I take some of the harness.

Ive seen those forums with corvettes and xm like you showed me as well, Ive seen one somehwere where they had an electronics shop or somewhere clear the eeprom in the module so it would learn the vin when installed, however at dealer level they couldnt do it, They called techline where they were told that once the vin is learned they cannot be reused.
Ive seen some service information regarding the newer GM vehicles like the 2010 lacrosse and camaro that this is true for the actual headunits as well, and a simple swap of a climate control for example or other modules will require all the modules be reprogrammed to sync with each other or the vehicle will not start. Part of the new communication , went from class2 to gm lan and now this new communication which they call Global A.