“Having a spare is always a good call. To program your extra key, you’ll need your current key.
Before getting started, make sure all of the car’s windows and doors are closed, as well as the tailgate. Also, keep in mind that this procedure will erase all saved key fobs, so don’t forget to reprogram your current key, as well.
When all keys are programmed, turn the ignition off and pull the key out in order to exit the transmitter programming mode.
Good luck programming your keys!”