GMC 2002 Envoy - Manual (Page 170)

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Display Language
To select your personalization for display language,
press the select button while DISPLAY LANGUAGE is
displayed on the DIC. Pressing the select button will
scroll through the following languages:
D English
D French
D Spanish
D German
D Arabic
D Portuguese
D Japanese
D Italian
Arabic, Portuguese, Japanese and Italian will only be
available as choices if they are enabled in the vehicle.
Choosing any of the above languages will display all of
the information on the DIC in the desired language.
If you accidentally choose a language that you don’t
want or understand, press and hold the personalization
button and the trip information button at the same time.
The DIC will begin scrolling through the languages
in their particular language. English will be in English,
French will be in French and so on. When you see the
language that you would like, release both buttons.
The DIC will then display the information in the
language you chose.
Choose one of the eight options and press the
personalization button while it is displayed on the DIC
to select it.
Select Button
The select button is used to reset certain functions and
turn off or acknowledge messages on the DIC display.
The select button also toggles through the options
available in each personalization menu. For example,
this button will reset the trip odometers, turn off the
FUEL LEVEL LOW message, and toggle through
the languages you can select the DIC to display
information in.