Adding Factory OEM XM to a 2007.5-2011 NNBS

I have noticed a few people wondering how to add XM to the NNBS and that there was not alot of info on this kit. So here you go. Kit includes everything you need to install.

So i just picked up a OEM XM kit for my NNBS, kit #20940402 at my dealership today for $349.99. This kit is for 2007.5 - early 2011 NNBS. As long as you have Onstar(UE1) and NOT (U1C, UM7, UBS, or U2K) RPO Codes, and Cat/Band button on your radio, this will work for your vehicle. Most if not all Nav units are XM capable. Late 2011-2013 NNBS use a different kit. You will also get a 3 month free trial of XM with Nav traffic and weather (if your nav unit is capable). I will be updating pics tomorrow of when i install it. These kits were all manufactured late 2010/early 2011.

You can buy all the pieces separately, which is about $30 bucks cheaper, but doesn't include the activation code. I do not know if you are able to get an activation code separately.

Kit includes :

- New sharkfin antenna for Onstar/XM #25814089

- XM cable from antenna to receiver #15217160

- Receiver box #20938347

- Harness, which is plug and play #88968178

- Bracket/hardware to mount receiver behind glovebox #15201868

- Complete detailed instructions on how to install #19154505

- Paperwork on how to activate XM #88961286