1999 GMC YUKON display

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Automatic Transmission Operation
There are several different positions for your shift lever.
Your vehicle features an electronic shift position
indicator within the instrument cluster. This display
must be powered anytime the shift lever is capable of
being moved out of PARK (P). This means that if your
key is in OFF, rather than LOCK, there will be a small
current drain on your battery which could discharge
your battery over a period of time. If you need to leave
your key in the ignition in OFF for an extended period
for any reason, it is recommended that you disconnect
the battery cable from the battery to prevent discharging
your battery.PARK (P): This locks your rear wheels. It's the best
position to use when you start your engine because your
vehicle can't move easily.
CAUTION:
It is dangerous to get out of your vehicle if the
shift lever is not fully in PARK (P) with the
parking brake firmly set. Your vehicle can roll.
Don't leave your vehicle when the engine is
running unless you have to. If you have left the
engine running, the vehicle can move suddenly.
You or others could be injured. To be sure your
vehicle won't move, even when you're on fairly
level ground, always set your parking brake and
move the shift lever to PARK (P).
See ªShifting Into PARK (P)º in the Index. If
you're pulling a trailer, see ªTowing a Trailerº in
the Index.

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Exterior Lamps
Your parking/headlamp knob is on the driver's side of
your instrument panel.
Turn the knob clockwise, to the parking lamp symbol, to
turn on the following:

Parking Lamps

Sidemarker Lamps
Taillamps

License Plate Lamps

Instrument Panel Lights
Turn the knob clockwise again, to the master lighting
symbol, to turn on all the lamps listed as well as
the headlamps.
Turn the knob counterclockwise, to OFF, to turn off
your lamps. For additional information on headlamp
operation, see ªHeadlamp Delayº in the Index.
Turn the thumbwheel next to the knob up to adjust
instrument panel lights. Turn the thumbwheel up to the
first notch to return the radio display and gearshift
indicator LED display to full intensity when the
headlamps or parking lamps are on. To turn on the dome
lamps (with the vehicle doors closed) turn the
thumbwheel up to the second notch position.
You can switch your headlamps from high to low beam
by pulling on the turn signal/high
-beam lever.
A circuit breaker protects your headlamps. If you have
an electrical overload, your headlamps will flicker on
and off. Have your headlamp wiring checked right away
if this happens.

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The length of time that the headlamps stay on after the
ignition is turned off can be adjusted by pressing and
holding the HEADLAMP DELAY button. The
delay can be varied in five steps (0, 15, 30, 60 and
90 seconds). When the HEADLAMP DELAY button is
held in, the Light Emitting Diode (LED) on the mirror
will show five step changes in brightness. When the
LED is at its brightest the headlamp delay will be
90 seconds, and when it is most dim the delay will be
zero seconds.
Interior Lamps
Instrument Panel Intensity Control
The instrument panel intensity control is located next to
the parking/headlamp switch. Turn the thumbwheel up
to adjust the instrument panel lights. Turn the
thumbwheel up to the first notch to return the radio
display and gear shift indicator LED display to full
intensity when the headlamps or parking lamps are on.
To turn on the dome lamps (with the vehicle doors
closed) turn the thumbwheel up to the second
notch position.
Exit Lighting and Delayed Illumination
With this feature, your interior lamps will come on and
stay on for up to 25 seconds when entering the vehicle
and up to 5 seconds when leaving your vehicle.
When the doors are opened, the dome lamps will only
come on if the dome lamp button is in the out position.
When all doors are closed or the dome lamp button is
pressed in, the lamps will stay on for a short period of
time and will then fade out.
Dome Lamps
The dome lamps will come on when you open the doors.
You can also turn the dome lamps on by turning the
thumbwheel, located next to the parking/headlamps
switch knob, all the way up to the second notch. In this
position, the dome lamps will remain on whether the
doors are opened or closed.

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Mirrors
Electrochromic Inside Rearview Mirror
with Compass, Temperature Display and
Headlamp Delay
Your vehicle has electrochromic inside and outside
rearview mirrors. Your vehicle also has a headlamp
delay feature. See ªHeadlamp Delayº in the Index for
more information.
When on, an electrochromic mirror automatically dims
to the proper level to minimize glare from lights behind
you after dark.
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.
The mirror also includes a display in the upper right
corner of the mirror. This can be used as a compass or to
indicate outside air temperature.

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Temperature Display
The temperature can be displayed by pressing the TEMP
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 switch for three seconds until
the display shows only F
or 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 normal in the temperature scale
you have selected.The normal display will show a temperature reading in
degrees Fahrenheit or Celsius. If an abnormal reading is
displayed, please consult your dealer.
Electrochromic Mirror Operation
The TEMP side of the switch, located at the bottom of
the mirror, also 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 switch for eight
seconds. The mirrors will darken and remain dark until
the button is released. To turn the mirrors off, press and
hold the TEMP switch for eight seconds.
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.

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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.
Compass Calibration
If, after five 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 two circles at 5 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.
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. Press and hold the COMP switch, located at the
bottom of the mirror, for three seconds until a zone
number appears in the display.

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2. Find your current location and variance zone number
on the following zone map.
3. Press the COMP switch on the bottom of the mirror
until the new zone number appears in the display.
After you stop pressing the switch in, the display
will show a compass direction within a few seconds.
Electric Outside Rearview Mirrors
The electric mirrors can be adjusted to point where you
want from inside the vehicle.
Select the mirror you want
to move by moving the
center of the switch, located
on the driver's door armrest,
to L (left) or R (right).
Then, adjust the mirror angle by pressing the outer
arrows on the switch until the mirror is adjusted where
you want it. The center position turns the electric
mirrors off.
Electrochromic Heated Outside
Rearview Mirrors
The outside rearview mirrors feature auto-dimming and
defrost modes.

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To turn on the auto-dimming feature, press and hold the
inside rearview mirror TEMP button for eight seconds.
See ªElectrochromic Inside Rearview Mirror with
Compass, Temperature Display and Headlamp Delayº in
the Index for further information.
To turn on the defrost feature, press the rear window
defrost button. See ªRear Window Defoggerº in the
Index for further information.
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.
Storage Compartments
Your vehicle has a variety of storage compartments
designed to store small items.
Glove Box
To open your glove box, move the release button toward
the passenger's side and pull the door open.
Center Overhead Console
Your vehicle has an overhead console. It has storage
compartments inside it. Your vehicle also has a
Universal Transmitter. See ªUniversal Transmitterº in
the Index.
Sunglasses Compartment
The center overhead compartment can be used to
conveniently store your sunglasses.
To open the center compartment, press the release
button located at the rear of the compartment door.
Place your sunglasses in the compartment door with the
lenses facing out.