Code for the stereo should be written on a small card located in the owners manual,sometimes a sticker in the glove box. if it is not there and is lost - you can contact the dealer and see if they will give you the code when you give them your VIN number, ( they also might need the radio ID number which is located on the radio case itself, but Jeep is good about keeping great security number records and should be able access this information with just the VIN # ). after getting the code make sure you write the code down in the manual for future reference.
mik, February 2011