Amazing...the search feature actually works on this site.
I am looking for a Mother's Day gift for my mother, and thought about this. She also has a 2004 Grand Prix GT with the same stereo. I registered here to ask if the Precision Interface Electronics GM12-AUXv2 would be the correct adapter to add an aux input to her stereo. But, this thread raises another question. Her car originally had the XM...a 3 month subscription was given to her when she purchased the car, but she did not renew it and therefore does not currently use it. Can I assume I will still be able to use this adapter? I am not concerned about the possibility of losing the XM ability...just want to make sure it will work before I order, since I will only have one shot to install it for her. I suspect that if it will work, I will not have the same issue as Merlin since the XM options do still come up for her (don't remember if an Aux option comes up).