Stock radio & Onstar

[h3\'er]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by H3 Hummer:
I got an Alpine last weekend - they thought the OS2 adapter worked with my radio also. It doesn't it only works with some of the H3's. If you have the cheesy no MP3 playing factory stereo you don't need the Os2 but you do need something else. </div></BLOCKQUOTE>

OS2 adpater cares less about what radio you have in there. Its being removed anyway.
the OS2 adapter allows you to plug into the factory harness directly and retain the onstar capability. Doesn't matter what you have for factory radio Monsoon or non Monsoon.

Also makes for a clean install if you ever sell just unplug and put the factory radio back in