You are correct that there is a switch inside the shifter that tells the ignition switch that the vehicle is in park and it is okay to release the key. Moving the shifter around gets the switch to finally show that the vehicle is in park and it then releases the key.
Unfortunately this is a pretty common issue on all vehicles. The unfortunate thing is we do not have a service manual on this vehicle to be able to provide you detailed info on how to do this. However, the Armada is the USA version which is close. Clearly it will not be exactly the same but assuming your vehicle is a floor shifter, it should be similar.
Let me know if you have questions. Thanks
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Friday, April 17th, 2020 AT 8:06 AM