1999 CHEVROLET SUBURBAN Owners Manual

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2-43 Reading Lamps
If your vehicle has reading
lamps, press the button
next to the lamp to turn the
lamp on.
The lamps can be adjusted
to point in the direction
you want.
Press the button again to
turn the lamp off.
If your vehicle has an overhead console with reading
lamps, press the button next to the lamp to turn the
lamp on.
The lamps can be adjusted to point in the direction
you want.
Press the button again to turn the lamp off.
Mirrors
Inside Day/Night Rearview Mirror
Pull the tab under the mirror to reduce glare from
headlamps behind you after dark. Push the tab forward
for normal daytime operation.
Electrochromic Inside Rearview Mirror
with Compass (If Equipped)
Your vehicle may have an electrochromic inside
rearview mirror.
When on, an electrochromic mirror automatically dims
to the proper level to minimize glare from lights behind
you after dark.

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2-44
The mirror also includes an eight-point compass display
in the upper right corner of the mirror face. When on,
the compass automatically calibrates as the vehicle
is driven.
Mirror Operation
The right side of the switch located at the bottom of the
mirror turns the electrochromic mirror on and off. The
AUTO LED will come on when the electrochromic mirror
is turned on. To turn the mirror on, press and hold the
MIRROR button for three seconds. The mirror will darken
and remain dark until the button is released. To turn the
mirror off, press and release the MIRROR button.

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2-45
Compass Operation
Press the COMP switch once briefly 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.
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.Compass Calibration
If, after two seconds, the display does not show a
compass heading (ªNº for North, for example), there
may be a strong magnetic field interfering with the
compass. Such interference may be caused by a
magnetic antenna mount, magnetic note pad holder or a
similar magnetic item. If the letter ªCº should ever
appear in the compass window, the mirror may need
calibration.
The mirror can be calibrated in one of two ways:

Drive the vehicle in circles at five mph (8 km/h) or
less until the display reads a direction, or

Drive the vehicle on your everyday routine.

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2-46
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:
1. Use the COMP button located at the bottom of
the mirror.
2. Press and hold the COMP button for three seconds
until a zone number appears in the display.
3. Find your current location and variance zone number
on the following zone map.
4. 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 in, the display will
show a compass direction within a few seconds.

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2-47 Electrochromic Inside Rearview Mirror
with Compass and Temperature Display
(If Equipped)
Your vehicle may have electrochromic inside and
outside rearview mirrors.
When on, an electrochromic mirror automatically dims
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. This can be used as a compass
or to indicate outside air temperature.
Temperature Display
The temperature can be displayed by pressing the
TEMP side of the switch. Pressing the TEMP switch
once briefly, will toggle the temperature reading on and
off. To alternate the temperature reading between
Fahrenheit and Celsius, press and hold the TEMP button
for three seconds until the display blinks F
and C
.
Press and release the TEMP switch to toggle between
the Fahrenheit and Celsius readings. After five seconds
of inactivity, the display will return to a normal
temperature reading.

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2-48
Press and release the TEMP switch to toggle the
temperature display between Fahrenheit or Celsius.
If an abnormal reading is displayed, please consult
your dealer.
Electrochromic Mirror Operation
The right side of the switch, labeled TEMP, located at
the bottom of the mirror turns the electrochromic inside
and outside mirrors on and off. An indicator light,
located to the right of the TEMP switch, will come on
when the electrochromic mirrors are turned on. To turn
the mirrors on, press and hold the TEMP button for six
seconds. To turn the mirrors off, press and hold the
TEMP button for six seconds. The indicator light will
turn off.
Compass Operation
Press the COMP switch once briefly 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.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.
Compass Calibration
If, after two seconds, the display does not show a
compass heading (ªNº for North, for example), there
may be a strong magnetic field interfering with the
compass. Such interference may be caused by a
magnetic antenna mount, magnetic note pad holder
or a similar magnetic item. If the letter ªCº should ever
appear in the compass window, the mirror may
need calibration.
The mirror can be calibrated in one of two ways:

Drive the vehicle in circles at five mph (8 km/h) or
less until the display reads a direction, or

Drive the vehicle on your everyday routine and after
several turns the compass will become calibrated and
will display a direction.

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2-49
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:
1. Use the COMP button located at the bottom of
the mirror.
2. Press and hold the COMP button for three seconds
until a zone number appears in the display.
3. Find your current location and variance zone number
on the following zone map.
4. 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 in, the display will
show a compass direction within a few seconds.

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2-50 Outside Manual Adjust Mirrors
Adjust your outside mirrors so you can just see the side
of your vehicle and have a clear view of objects behind
you. Some mirrors can be folded in, to enter
narrow doorways.
The use of hood
-mounted air deflectors and convex
add
-on mirror attachments may adversely affect
mirror performance.
Camper Type Outside Mirrors
(If Equipped)
If your vehicle is equipped with the camper type
mirrors, they can be adjusted so you can have a clear
view of objects behind you.