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EDIT Push the "E/M" button that sticks out of the speedometer display, and looks like the trip reset button.

There isn't a E/M button on this particular model, at least not on my 1990 Cadillac DeVille.

underneath the dash on the drivers side by the ash tray there is a one wire connector. disconnect for English, connect for metric.

This answer worked perfectly. as you are looking at the Ash tray to the left side between ash tray and steering column, the wire is behind the covers on the bottom of the dash. You'll have to take off the two screws holding the cover that covers the steering column. Then, you will see (at least on mine) a connector with 1 wire. A Black wire and ont he other end a baby blue wire. Unhook it and English system. Hook it up, Metric. Thanks!

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โˆ™ 2011-09-13 04:27:29
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Q: How do you get your 1990 Cadillac Sedan Deville fuel temp and mileage reading off of metric and back to USA standard reading?
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