Well first time poster here. I Bought a 2007 sts REPO without a key,it has push button start I've been Reading around and I am getting confused. I went and bought a 2008 key fob with a cut key blade. My question is do I need a door (actual key) to program my key fob or do I have to go to the dealer? And how does the actual key
Look like? Thanks for any help!