Hello, I am an owner of a 2008 Grand Prix Base. I want to make my car have an aux port. I know that an adapter is needed, (GM12-AUXV2, I believe its called?) But I'm having a real hard time finding one even on the internet or for a decent price for that matter. I have the radio that has XM also, which I've saw in a few people make a reference to it, saying its an even easier way? I'm somewhat clueless on this and I figure that maybe someone on here could give me some of their expertise on what my options are! Please and thank you!