Compass Operation; Compass Calibration - GMC 2004 Canyon Owner's Manual

Automatic Dimming Rearview Mirror
with Compass and Temperature
Display
Your vehicle may have an automatic dimming rearview
mirror with a compass, temperature display, and
map lamps.
Mirror Operation
The mirror automatically changes to reduce glare from
headlamps behind you. A time delay feature prevents
rapid changing from the day to night positions while
driving under lights and through traffic.
P
(On/Off): The automatic dimming feature is
automatically activated when the vehicle is started.
The automatic dimming feature is turned on or off by
pressing this button located on the lower part of
the mirror. Press and hold the button for up to three
seconds to turn this feature on or off.
T (Indicator Light): This light will turn on when the
automatic dimming feature is active.
Map Lamps
The mirror has map lamps located at the bottom of the
mirror. To manually turn the lamps on or off, press
the button next to each lamp.

Compass Operation

The mirror has an eight-point compass display in
the upper right corner of the mirror face. When on,
the compass automatically calibrates as the vehicle is
driven.
When the ignition and the compass feature are on,
the compass will show two character boxes for
approximately two seconds. After two seconds,
the mirror will display the current compass heading.
For example, NE is displayed for north-east.

Compass Calibration

If after two seconds the display does not show a
compass heading, there may be a strong magnetic field
interfering with the compass. Such interference may
be caused by a magnetic antenna mount, note
pad holder or similar object. If the letter C appears in
the compass window, the compass needs calibration.
The mirror compass can be calibrated by driving
the vehicle in circles at 5 mph (8 km/h) or less until the
display reads a direction.
The compass can be placed in calibration mode by
pressing and holding the on/off button until a C appears
on the compass display.
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