GM / General Motors: change display from farenheit to celsius

1994 Buick Roadmaster. In daylight I can see that there is a Celsius icon in
the display, so there must be a way to change it to showing temperatures in
Celsius instead of Farenheit. Does anyone know how to do that?

/Peter, SWEDEN

My 97 Astro has that above the windshield with a button.

"Peter" <peter@vonne(remove).se> wrote in message
news:YeWmb.35171$telia.net... 
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