All Right so I’ve done it. I Bought a 2011 Onstar Module from a CTS AWD w/Bluetooth and transplanted it in my 03/08 RWD 2008 Pre Bluetooth CTS.
Something’s to note the 11 Onstars (I believe across the entire GM line up)
They only have 2 antenna connections 1 for Bluetooth and the other feeds both the Cell/data connection to onstar and the GPS They have a built in diplexer.
I only did this mod for the Bluetooth but now I have a working Mylink App!
So since I Have individual connections for the Cell and GPS antennas I only plugged in the thicker one the Cell antenna and I left the GPS one off. This works I Can call onstar. My Nav Radio has its own dedicated GPS Antenna. So the Only Down side is Onstar probably won’t be able to locate you with GPS they might be able to do it with the Cell towers?? But if you’re still conscious after an accident I guess you could tell them where you’re at. You could eliminate that whole issue by purchasing a 2011+ roof mount antenna.
A little side note on the Onstar install I Saw other people struggling with the nut that holds the VCIM down that just spins. Once I had it loose I just held the bolt up with my finger nails while I spun it off and after I Had the VCIM out of there I took a 10mm Nut and spun it back down to hold the bolt in place and then I just put the VCIM back in place and took another 10mm nut and tighted it on top of that same nut.
So once I had it in I tested the Bluetooth and It works great Numbers pop up on the Cluster with my EVO. I can voice dial pick up and reject call using the nav or the steering wheel buttons. I also double checked the Nav GPS and its working fine along with the XM.
So Now I decided to call up onstar from inside the car and Get my free 3 months. But once I hit the button I knew it was never activated so she’s like congrats on your new CTS (Sweet now I just got a free 1year trial) So after that was done I set up the online part Downloaded the android app
Everything seems to be pulling the right info the only problem I have with it is the Remote start keys are not on my phone I’m not sure if the 11 had Remote start or not. I’m sure it’s probably just a Program issue with the VCIM so if anyone wants to help me out in the STL area with a tech2 let me know please. Also the Oil % monitor does not match the Car so I think this may correct its self once I change my oil/reset it.
I Tried running the VIN through compnine but I guess it’s too new to see if it had Remote start
If someone could please run the VIN for me that would be awesome 1G6D5EY2B0112667
Also everything else seems to still work fine in the Car I Have the EZkey’s my FOB RS still works. I saw some possible issue over in the Camaro Forums about their cruise control not working after pulling the VCIM. No Problems!
PS: My next project is the Rearview Camera so if someone could send me the files/Maps that would be awesome.