2007 CHEVROLET TRAIL BLAZER Owners Manual

3. Keep pressing the on/off button until the
desired zone number appears in the display.
Release the button. After approximately
four seconds of inactivity, the new zone
number will be locked in and the
compass/temperature display will return.
4. Calibrate the compass as described next.
Compass Calibration
The compass may need calibration if one of the
following occurs:
After approximately ve seconds, the display
does not show a compass heading (N for
North, for example), there may be a strong
magnetic eld interfering with the compass.
Such interference may be caused by a
magnetic antenna mount, magnetic note pad
holder or a similar magnetic item.
The compass does not display the correct
heading and the compass zone variance
is set correctly.In order to calibrate, CAL must be displayed in the
mirror compass windows. If CAL is not displayed,
press and hold the on/off button until CAL is
displayed.
The compass can be calibrated by driving the
vehicle in circles at 5 mph (8 km/h) or less until the
display reads a direction.
Passenger Airbag Indicator
The vehicle may be equipped with a passenger
airbag indicator, on the mirror glass, just above the
buttons. If the vehicle has this feature, the
mirror will display the word ON, or an airbag
symbol in Canada, when the passenger airbag is
enabled. For more information, seePassenger
Sensing System on page 80.
Cleaning the Mirror
When cleaning the mirror, use a paper towel or
similar material dampened with glass cleaner.
Do not spray glass cleaner directly on the mirror
as that may cause the liquid cleaner to enter
the mirror housing.
137

Automatic Dimming Rearview Mirror
with Compass
Your vehicle may have an automatic-dimming
rearview mirror with a compass.
O(On/Off):This is the on/off button for the
automatic dimming feature and compass.
Automatic Dimming Mirror Operation
The automatic dimming mirror function is turned on
automatically each time the ignition is started.
To operate the automatic dimming mirror, do the
following:
1. Make sure the green indicator light, located to
the left of the on/off button, is lit. If it’s not,
press and hold the on/off button until the green
light comes on, indicating that the mirror is
in automatic dimming mode.
2. Turn off the automatic dimming mirror function
by pressing and holding the on/off button until
the green indicator light turns off.
Compass Operation
Press the on/off button once to turn the compass
on or off.
There is a compass display in the window in the
upper right corner of the mirror face. The compass
displays a maximum of two characters.
For example, “NE” is displayed for north-east.
Compass Calibration
Press and hold the on/off button to activate the
compass calibration mode. CAL will be displayed in
the compass window on the mirror.
The compass can be calibrated by driving the
vehicle in circles at 5 mph (8 km/h) or less until the
display reads a direction.
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Compass Variance
Compass variance is the difference between earth’s
magnetic north and true geographic north. The
mirror is set to 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,
such as during a long distance cross-country trip,
it will be necessary to adjust for compass variance.
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 on/off button for
six seconds. Release the button when
(FOR ZONE) is displayed. The number shown
is the current zone number.
3. Scroll through the zone numbers that appear in
the window on the mirror by pressing the on/off
button. Once you nd your zone number,
release the button. After about four seconds,
the mirror will return to the compass display,
and the new zone number will be set.
139

Automatic Dimming Rearview Mirror
with Compass and Temperature
Display
If the vehicle is equipped with an automatic mirror,
it will, when on, automatically dim to the proper
level to minimize glare from lights behind you
after dark.
The mirror also includes a display in the upper
right corner of the mirror face. The compass
reading and the outside temperature will both
appear in the display at the same time. The dual
display can be turned on or off by briey
pressing either the TEMP or the COMP button.
Automatic Dimming Mirror Operation
The automatic dimming mirror function is turned on
automatically each time the ignition is started.
To operate the automatic dimming mirror, do the
following:
1. Make sure the green indicator light, located to
the left of the on/off button, is lit. If it’s not,
press and hold the on/off button until the green
light comes on, indicating that the mirror is
in automatic dimming mode.
2. Turn off the automatic dimming mirror function
by pressing and holding the on/off button until
the green indicator light turns off.
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Temperature Display
The temperature can be displayed by pressing the
TEMP button. Pressing the TEMP button once
briey, will toggle the temperature reading on
and off. To alternate the temperature reading
between Fahrenheit and Celsius, press and hold
the TEMP button until the display blinks F and C.
Press and release the TEMP button to toggle
between the Fahrenheit and Celsius readings.
After approximately four seconds of inactivity,
the display will stop blinking and display the last
selection made.
If an abnormal reading is displayed, for an
extended period of time, please consult your
dealer. Under certain circumstances, a delay in
updating the temperature is normal.
Compass Operation
Press the COMP button once briey to turn the
compass on or off.
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 compass heading.
Compass Calibration
The compass may need calibration if one of the
following occurs:
If CAL is displayed while driving in the vehicle.
After approximately ve seconds, the display
does not show a compass heading (N for
North, for example), there may be a strong
magnetic eld interfering with the compass.
Such interference may be caused by a
magnetic antenna mount, magnetic note pad
holder or a similar magnetic item.
The compass does not display the correct
heading and the compass zone variance
is set correctly.
141

In order to calibrate, CAL must be displayed in the
mirror compass windows. If CAL is not displayed,
press and hold the COMP button until CAL is
displayed.
The compass can be calibrated by driving the
vehicle in circles at 5 mph (8 km/h) or less until the
display reads a direction.
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.
142

Passenger Airbag Indicator
The mirror may be equipped with a passenger
airbag indicator on the mirror glass, just above the
buttons. If the vehicle has this feature the mirror
will display the word ON, or an airbag symbol
in Canada, when the passenger airbag is enabled.
For more information seePassenger Sensing
System on page 80.
Cleaning the Mirror
When cleaning the mirror, use a paper towel or
similar material dampened with glass cleaner.
Do not spray glass cleaner directly on the mirror
as that may cause the liquid cleaner to enter
the mirror housing.
Outside Manual Mirrors
If the vehicle has the manual outside mirrors,
adjust each outside mirror so that a little of
the vehicle and the area behind it can be seen
while sitting in a comfortable, driving position.
Both mirrors can be manually folded inward
by pulling them towards the vehicle. Push the
mirrors away from the vehicle, to the normal
position, before driving.
Outside Power Mirrors
Your vehicle may have this feature. The power
mirror control is located on the driver’s door.
Turn the control knob left or right to select the
desired mirror. Then move the control knob to the
left or right or up or down to position the mirror
so that you can see a little of the outside of
the vehicle. After adjusting the position of the
mirrors, turn the knob to the center off position so
that the mirrors do not move.
If the travel position in any direction of the mirror
is reached, it will enter a ratcheting mode.
This action is harmless. It is a warning that the
mirror can go no further. To stop this action, back
the mirror up by moving the knob in the opposite
direction.
The mirrors can be manually folded inward to
prevent damage when going through an automatic
car wash. To fold, push the mirror toward the
vehicle. To return the mirror to its original position,
push outward. Be sure to return both mirrors to
their original unfolded position before driving.
143

Outside Curb View Assist Mirror
If the vehicle has this feature, the passenger’s
outside mirror will adjust to a preset tilt position
while the vehicle is in REVERSE (R) gear.
Curb view assist may be useful when you are
parallel parking. The mirror will return to normal
position when the vehicle is shifted out of
REVERSE (R) gear. Automatic mirror movement
in either direction will follow a short delay.
You may be able to turn this feature on or off
through the Driver Information Center (DIC).
SeeDIC Vehicle Customization on page 231.
Outside Convex Mirror
{CAUTION:
A convex mirror can make things (like
other vehicles) look farther away than
they really are. If you cut too sharply into
the right or left lane, you could hit a
vehicle. Check your inside mirror or
glance over your shoulder before
changing lanes.
The passenger’s outside mirror is convex.
A convex mirror’s surface is curved so more can
be seen from the driver’s seat.
144