Hey guys,

Im trying to find an interface harness for my denali, to change the radio. It has onstar and bose, would like to retain onstar. Does anyone know which interface I need??

Can you snap a pic of the stock radio? Cause I don't remeber what the thing looks like. From that I could tell ya what you'd need.

Well the local shop here got me a GMOS-LAN-02 interface that was not even close for my envoy. I called metra this morning and they state i need a GMOS-04 interface. SO I am going to try that one i guess. i see CC sells them also...I appericate your responce and will be back for sure if this one dont work, man the D3 looks so clean sitting in there with the wood grain trim.

Ok the os04 will work. If you can get the newer version of it, it'll have the vss and everything there for you.