This video is for 2nd generation Toyota Tundras (2007 - 2013) that have a blank button slot to the right of the steering wheel. This blank is where a switch tree is located on some trims that contains the buttons 'Info', 'Select Reset', 'Setup US/M', and then if the truck has Sonar the bottom most button would be the Sonar button. Adding this switch, and sometimes a couple of wires will allow these trucks that previously only displayed the temperature next to the time to now give you your average MPG, the trucks instant MPG, and also estimated range remaining on your current tank of fuel.


Here's one of a few threads I found in forums that had some talk about this, and this had the most information I could find:
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