2002 GMC SIERRA rear view mirror

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Mirrors
Electrochromic Inside Rearview Mirror
with Compass, Temperature Display and
OnStar Controls
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 dual 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.Temperature and Compass Display
Press the on/off button, located to the far left, briefly to
turn the comp/temp display on or off.
If the display reads CAL, you will need to calibrate
the compass. For more information on calibration,
see below.
To switch between Fahrenheit and Celsius
do the following:
1. Press and hold the on/off button for four seconds
until either a flashing
F, or
C appears.
2. Press the button again to change the display to the
desired unit of measurement. After approximately
four seconds of inactivity, the new unit will be
locked in and the compass/temperature display
will return.

2-48 Power Outside Rearview Mirrors
The controls are located on the driver's door armrest.
Move the upper selector switch to the left or right to
choose the mirror you want to adjust; then use the
arrows located on the four
-way control pad to adjust
the mirror.
The mirrors include ground illumination lamps (puddle
lamps) in the base of the mirror. For more information
on these lamps, see ªPuddle Lampsº in the Index.
Convex Outside Mirror
Your passenger's side mirror is convex. A convex mirror's
surface is curved so you can see more from the driver's seat.
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 lane, you could hit a vehicle on
your right. Check your inside mirror or glance over
your shoulder before changing lanes.
Heated Outside Rearview Mirrors
The outside rearview mirrors have a defrost mode.
To turn on the defrost feature, press the rear window
defogger button. See ªRear Window Defoggerº in the
Index for further information.
Driver's Outside Auto-Dimming
Rearview Mirror
The driver's outside mirror will adjust for the glare of any
headlamps behind you. This feature is controlled by the
on and off settings on the electrochromic mirror. See
ªElectrochromic Mirror Operationº earlier in this section.

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Here are some tips on night driving.

Drive defensively.

Don't drink and drive.

Adjust your inside rearview mirror to reduce the
glare from headlamps behind you.

Since you can't see as well, you may need to
slow down and keep more space between you and
other vehicles.

Slow down, especially on higher speed roads. Your
headlamps can light up only so much road ahead.

In remote areas, watch for animals.

If you're tired, pull off the road in a safe place
and rest.
No one can see as well at night as in the daytime. But as
we get older these differences increase. A 50
-year-old
driver may require at least twice as much light to see the
same thing at night as a 20
-year-old.
What you do in the daytime can also affect your night
vision. For example, if you spend the day in bright
sunshine you are wise to wear sunglasses. Your eyes will
have less trouble adjusting to night. But if you're
driving, don't wear sunglasses at night. They may cut
down on glare from headlamps, but they also make a lot
of things invisible.You can be temporarily blinded by approaching
headlamps. It can take a second or two, or even several
seconds, for your eyes to readjust to the dark. When you
are faced with severe glare (as from a driver who
doesn't lower the high beams, or a vehicle with
misaimed headlamps), slow down a little. Avoid staring
directly into the approaching headlamps.
Keep your windshield and all the glass on your vehicle
clean
-- inside and out. Glare at night is made much
worse by dirt on the glass. Even the inside of the glass
can build up a film caused by dust. Dirty glass makes
lights dazzle and flash more than clean glass would,
making the pupils of your eyes contract repeatedly.
Remember that your headlamps light up far less of a
roadway when you are in a turn or curve. Keep your
eyes moving; that way, it's easier to pick out dimly
lighted objects. Just as your headlamps should be
checked regularly for proper aim, so should your eyes
be examined regularly. Some drivers suffer from night
blindness
-- the inability to see in dim light -- and
aren't even aware of it.