Pontiac 2003 Bonneville Owner's Manual page 184

Choosing Your Zone Number Locate your zone number on the above map. If your
number is different than the one shown when you turn
the key on, follow the steps to change your zone
number.
If you live on the line, you can pick the zone area you
are most likely to drive in. (In Alaska, use Zone 9 or
IO.
In Hawaii, use Zone 7.)
Changing Your Zone Number
1. Press MODE to display COMPASS CALIBRATION.
2. Press SELECT to display RESET
3. Press RESET until your number appears.
4. Press MODE to exit the COMPASS CALIBRATION
MODE and store the new zone number. When the
MODE button
is pressed, the DIC will return to
the VEHICLE DATA mode.
CHANGES ZONE.
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