Compass Variance
The mirror is set in zone eight upon leaving the
factory. It will be necessary to adjust the compass
to compensate for compass variance if you live
outside zone eight. Under certain circumstances,
as during a long distance cross-country trip, it
will be necessary to adjust for compass variance.
Compass variance is the difference between
earth’s magnetic north and true geographic north.
If not adjusted to account for compass variance,
your compass could give false readings.
To adjust for compass variance, do the following:
1. Find your current location and variance
zone number on the following zone map.
2. Press and hold the COMP button until a zone
number appears in the display.
3. Press the COMP button on the bottom of the
mirror until the new zone number appears in
the display. After you stop pressing the
button, the display will show a compass
direction within a few seconds.
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Summary of Contents for 2007 TrailBlazer
Page 6: ...These are some examples of symbols that may be found on the vehicle 6 ...
Page 92: ... NOTES 92 ...
Page 167: ... NOTES 167 ...
Page 168: ...Instrument Panel Overview 168 ...
Page 298: ... NOTES 298 ...
Page 378: ... NOTES 378 ...
Page 394: ...When you open the hood on the 5 3L V8 engine here is what you will see 394 ...
Page 396: ...When you open the hood on the 6 0L V8 TrailBlazer SS engine here is what you will see 396 ...
Page 512: ... NOTES 512 ...
Page 531: ...Engine Drive Belt Routing 4 2L V6 Engine 5 3L V8 and 6 0L V8 Engines 531 ...