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To adjust for compass variance do the following:
1. Find the current location and variance zone number
on the following zone map.
2. Press and hold the on/off button until a zone
number appears in the display.
3. Once a zone number appears in the display, press
the on/off button quickly until the correct zone
number appears in the display. If C appears in
the compass window, the compass may need
calibration. See “Compass Calibration”
explained previously.
Manual Rearview Mirror with
OnStar
®
and Compass
The vehicle may have a manual rearview mirror with
OnStar
®
and an eight-point compass display located in
the upper right.
Control buttons for the OnStar
®
system are at the
bottom of the mirror. See your GM dealer for more
information on the OnStar
®
system. Also, see OnStar
®
System on page 2-52 for more information about the
services OnStar
®
provides.
Mirror Operation
While sitting in a comfortable position, adjust the
rearview mirror so you can see clearly behind your
vehicle. Grip it in the center and move it up or down and
side to side. The day/night control, located at the
bottom of the mirror, adjusts the mirror to reduce
headlamp glare from behind during evening or dark
conditions. Push the control for daytime use; pull it for
night use.
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