GM Class 2 Radio

[pdxrealtor]

Does anyone know if there is a difference in GM class 2 radios from vehicle to vehicle?

I'm asking because coastal tech has the new IPOD lock pick, which works with GM class 2 radios (and many other GM radios), see http://www.coastaletech.com/New_Fold...IONS%201.1.pdf

You can see the instructions clearly identify the 2006 Hummer radio.

No brainer right? Well... I have talked with coastal tech and they state that although the Hummer is a class 2 radio, the way it communicates with the XM box is different than the rest of the GM class 2 radios.

I'm questioning their info because another guy has been trying to order the lock pick for his 06 Hummer and they are stating they don't make one... which they do, I know because I just bought and installed one.

Anyone have any knowledge they can share?