| There should be programming inforation on the FOB in the owner's manual. here are the procedures to make it work again if you don't have an owner's manual.
Resynchronization
Resynchronization may be necessary due to the
security method used by this system. The transmitter
does not send the same signal twice to the receiver. The
receiver will not respond to a signal that has been
sent previously. This prevents anyone from recording
and playing back the signal from the transmitter.
To resynchronize your transmitter, stand close to your
vehicle and press and hold the LOCK and UNLOCK
buttons on the transmitter at the same time for
15 seconds. The door locks should cycle to confirm
synchronization. If the locks do not cycle, see your
dealer for service.
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