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The individual key info on the Patriot is stored in the SKREEM / WCM inside the steering column.

When a new PCM is installed, the PCM is "supposed" to receive the "secret key" code from the WCM.
Font Screenshot Publication Terrestrial plant Number

If the secret key code doesn't transfer to the PCM, supposedly a p0633 code can be set.

All that said, another member here apparently "plug n played" a FS1 PCM without any additional programming:

Hopefully yours will work the same way.....🤞
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