Secondary Information Center (Sic); Electronic Compass - Pontiac 2005 Bonneville Owner's Manual

Secondary Information
Center (SIC)

Electronic Compass

Base model shown,
GXP model similar
The earth's magnetic field is not always the same
direction as true north as we know it. So, you must enter
a zone number to tell the compass the difference
between magnetic and actual north. This tells the
compass where in the country you are driving.
3-70
If your vehicle has a Driver
Information Center (DIC), it
also is equipped with an
electronic compass.
As with all compasses, this
unit senses the earth's
magnetic field to show the
direction the vehicle is
pointing.
The compass remembers your zone, so you only have to
change it if you drive to a new zone on the map. The
compass adjusts only a small amount for each zone, so
you may not notice a difference if you drive from one zone
to the next one, until you cross several zones.
Choosing Your Zone Number
Locate your zone number on the map. If your number is
different than the one shown when you turn the key
on, follow the steps to change your zone number.