Dashboard Blues

Half the people I talk to say the mileage is stored on the dashboard.
The other half believes it is just stored in the computer and the dash is nothing but for displaying the information.
Buick says it is stored on the car's 'computer' but I would need to have a replacement dashboard 'calibrated' somehow to match what the computer says. Otherwise they will not match...and I am not sure what happens if they don't match. Nor do I understand the fact that they would not match. To me it is all a bunch of malarkie. Buick is supposed to call me at some point, for some reason unknown to me at this point.....they just insisted they would call back.
Whatever dudes.
Now one might just ask why not just get the dash from the scrap yard and put it in?
Well, it is a third degree felony to swap out dashboards that do retain the mileage without having them calibrated first. And I guess you sign a waver with the serial of the dash that you also have to put the VIN of the vehicle on. Then it is submitted to the DMV, and they will have a record that the dash was swapped.
If a discrepancy is discovered, then it is the person who is on record as swapping the dash who gets in trouble.
Interesting.
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I at least put the dash back in last night. I was ok driving to work and back. But driving to a parts store afterwards troubled me when a cop drove behind me for a few miles. I can only imagine getting pulled over and when he asks if I know how fast I was going, noticing the missing dashboard, and impounding it. Not a charge I need to deal with at this time. But I left all of the paneling off, so I look like I am driving a ghetto-mobile.
Sa-weeeet.
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Interesting side note: The 'Service Engine Soon' light is now turned off. So unplugging the dashboard evidently resets messages. If the EGR valve were still saucing problems, the light would turn on again. However, it looks like it is an intermittent problem. So I am not replacing it until I see it causing problems continuously.