I bought a delco mp3 stereo from ebay a few days ago, since the harness connection was different from my 06 silverado I did some research and found out that that stereo fits malibus 04, cobalts 05, g6 06, equinox 05, and up. I almost dismanteled my mom's g6 to take the original stereo off, and I found out that it was the same plug than the mp3 I had just bought. I connected it, and nothing happens. If i press the clock button, the hour comes up. I tried pressing it for several seconds and nothing happens. However, when I press the am/fm button for a few seconds, the doors chime for 5 times. I think its prompting me for a code or something, but I dont know it or how to input it. I also tried the procedure that you guys have used and nothing... Here is a link to a picture of the stereo on ebay, I bought it from this same person, and if you know how to fix this problem it is really worth it because it retails at the dealerships for $1,124. Any help would be really appreciated. Thank you very much in advance.