Obtain all keys fasten seat belts and close doors .Turn ign from pos 1 to 2 4 times within 6 seconds .Pre 11/2000 turn ign to pos 1.12/2000 onward switch ign off.Programming mode now activated for 10 seconds proceed as follows.1/press and hold lock/unlock/or boot release button 2/wait for acoustic signal.3/to exit wait 10 seconds or turn ign to pos 3. hope this helps staight out of Auto data