hey man... i beleive the unit you need for integration is like teh gmco , just a newwer version. um i know it gets rid of bose if you got it . and it allows you to keep the onstar if you got it , but the gmcol29 is the unit you need if you dont have bose or onstar. we just had a huge discussion of the im portance of the gmco. with bose or onstar there are a few diff ones.

http://www.canadiancaraudio.com/onli...wont-work.html

thats the link to the discussion we had on teh gmco.