I have a like new PAC-AUDIO AOEM-GM21A adapter. This adapter allows you to hook an amp up to your factory radio. This unit is plug and play. This unit can be used on almost all gm cars and trucks, however you may want to check out their website to be sure. On eBay they are going for over $50 I will be willing to part with this for $35 shipped. Please let me know if you are intersted. I also have a perfect eBay rating and I aslo have feedback on this forum, so rest assure I am not trying to rip anyone off I just don't need it anymore!! Here is the link to see if it will work in your car http://www.pac-audio.com/oem1kits/aoemresu...for+AOEM-1+kits