How do you program Chrysler Pacifica Key?

To program a Chrysler Pacifica key, insert the original key into the ignition and turn it to the "On" position without starting the engine. After five seconds, turn the key back to the "Off" position and remove it. Insert the new key and turn it to the "On" position for about 10 seconds until the security light turns off, then turn it back to "Off." This process may vary slightly by model year, so consulting the owner's manual is recommended for specific instructions.