you need an adapter that plugs in behind the radio. You can find them on net or at local stereo shop. Most people on here use PIE brand. I personally use Peripheral. They are all about the same. The Peripheral piece has three aux inputs for Ipod, XM, etc. Dealer cost on it is $49.95 so that will tell you if your getting a good deal or not. There are also different part numbers depending on what year your truck is.(the old adapter wont work with the new trucks)