1.) Turn the vehicle on.
2.) Turn the radio off.
3.) Turn the radio on and immediately press and hold the select button.
4.) Press the < > keys to move through the different fields.
5.) Use the 1 thru 6 buttons ( depending on which menu - usually only 1 and 2 are used ) to select higher or lower settings.
This is how I've been doing it and it's worked every time.

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