Clarion Head Unit...
 

So i went to install a clarion head unit in the GTP today. It's an 02 with onstar...i found something that says that the onstar voice commands won't work without an addition. <GAY....So..i finish everything up and get everything back together..it all powered on..everything good to roll.. But no sound. can anyone tell me ANYTHING?!?!


PLease and thanks..

Eric