Hummer 2005 H2 - Manual (Page 120)

Temperature Display
The temperature can be displayed by pressing the
TEMP button. Press the TEMP button once briefly to
toggle the temperature reading on and off. To alternate
the temperature reading between Fahrenheit and
Celsius, press and hold the TEMP button for
approximately four seconds until the display blinks F
and C. Press and release the TEMP button to toggle
between the Fahrenheit and Celsius readings. After
about four seconds of inactivity, the display will
stop blinking and display the last selection made.
If an abnormal temperature reading is displayed for an
extended period of time (30 minutes), see your GM
dealer. Under certain circumstances, a delay in updating
the temperature is normal.
Automatic Dimming Mirror Operation
Press and hold the TEMP button for about eight seconds
to turn the automatic dimming feature on or off. The
indicator light to the right of the TEMP button will turn on
or off to show when the automatic dimming feature is
activated. Once the mirror is turned off, it will remain off
until it is turned back on, or until the vehicle is restarted.
Compass Operation
Press the COMP button briefly to turn the compass on
or off.
When the ignition and the compass feature are on, the
compass will show two character boxes for about
two seconds. After two seconds, the mirror will display
the compass heading.
Compass Calibration
The compass may need calibration if one of the
following occurs:
• If CAL is displayed while driving in the vehicle.
• After about five seconds, the display does not show
a compass heading (N for North, for example),
there may be a strong magnetic field interfering with
the compass. Such interference may be caused
by a magnetic antenna mount, a magnetic note pad
holder, or a similar magnetic item.
• The compass does not display the correct heading
and the compass zone variance is set correctly.
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