2007 GMC SIERRA CLASSIC headlamp

When AUTO is selected, the air conditioning
operation and air inlet will be automatically
controlled. The air conditioning compressor will
run when the outside temperature is over
about 40°F (4°C). The air inlet will normally be
set to outside air. If it is hot outside, the air
inlet may automatically switch to recirculate
inside air to help quickly cool down your
vehicle. The light on the button will come on in
recirculation.
2. Set the driver’s and passenger’s temperature.
To nd your comfort setting, start with a 74°F
(23°C) temperature setting and allow about
20 minutes for the system to regulate. Turn the
driver’s or passenger’s side temperature
knob to adjust the temperature setting as
necessary. If you choose the temperature
setting of 60°F (15°C) the system will remain
at the maximum cooling setting. If you
choose the temperature setting of 90°F (32°C)
the system will remain at the maximum
heat setting. Choosing either maximum setting
will not cause the vehicle to heat or cool
any faster.Be careful not to cover the solar sensor
located on the top of the instrument panel
near the windshield. This sensor regulates air
temperature based on sun intensity. It also
turns on the headlamps. For more information
on the solar sensor, see “Sensors” later in
this section.
To avoid blowing cold air in cold weather, the
system will delay turning on the fan until
warm air is available. The length of delay
depends on the engine coolant temperature.
Pressing the fan switch will override this delay
and change the fan to a selected speed.
9(Off):Press this button to turn off the entire
climate control system. Outside air will still
enter the vehicle, and will be directed to the oor.
This direction can be changed by pressing the
mode button. The temperature can also be
adjusted using either temperature knob. Press the
up or down arrows on the fan switch, the defrost
button, the AUTO button, or the air conditioning
button to turn the system on when it is off.
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Security Light
This light ashes when
the vehicle security
system is activated.
Cruise Control Light
This light comes on
whenever you set your
cruise control.
The light will go out when the cruise control is
turned off. SeeCruise Control on page 217
for more information.
Highbeam On Light
This light comes on
when the high-beam
headlamps are in use.
SeeHeadlamp High/Low-Beam Changer on
page 215.
Four-Wheel-Drive Light
The four-wheel-drive
light comes on when
you shift a manual
transfer case into
four-wheel drive and the
front axle engages.
Some delay between the shifting and the light
coming on is normal.
SeeFour-Wheel Drive on page 153for more
information.
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DIC Vehicle Customization
Your vehicle may have customization capabilities
that allow you to program some features to one
setting based on your preference. All of the
customizable options listed may not be available on
your vehicle. Only the options available will be
displayed on your Driver Information Center (DIC).
The default settings for the customization features
were set when your vehicle left the factory, but
may have been changed from their default
state since then.
To change feature preferences, make sure the
ignition is on and the vehicle is in PARK (P).
To avoid excessive drain on the battery, it
is recommended that the headlamps are turned
off. Press the customization button to scroll
through the available customizable options.
After pressing the customization button, VEHICLE
SETTINGS will momentarily display before
going to a customization option.
Lock Doors (Automatic Transmission only)
If you have an automatic transmission vehicle,
press the customization button until LOCK DOORS
appears in the display. To select your preference
for automatic locking, press the select button
while LOCK DOORS is displayed on the DIC.
Pressing the select button will scroll through the
following choices:
LOCK DOORS: IN GEAR (default):The doors
will lock when the vehicle is shifted out of
PARK (P).
LOCK DOORS: WITH SPEED:The doors will
lock when the vehicle speed is above
8 mph (13 km/h) for three seconds.
Choose one of the available options and press the
customization button while it is displayed on the
DIC to select it and move on to the next feature.
For more information on automatic door locks, see
Programmable Automatic Door Locks on
page 123.
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Choose one of the available options and press the
customization button while it is displayed on the
DIC to select it and move on to the next feature.
Unlock Feedback
Press the customization button until UNLOCK
FEEDBACK appears in the display. To select your
preference for the feedback you will receive
when unlocking the vehicle with the Remote
Keyless Entry (RKE) transmitter, press the select
button while UNLOCK FEEDBACK is displayed
on the DIC. Pressing the select button will
scroll through the following choices:
UNLOCK FEEDBACK: LAMPS (default):The
parking lamps will ash each time you press
the button with the unlock symbol on the RKE
transmitter.
UNLOCK FEEDBACK: HORN:The horn will
chirp the second time you press the button with the
unlock symbol on the RKE transmitter.
UNLOCK FEEDBACK: BOTH:The parking
lamps will ash each time you press the button
with the unlock symbol on the RKE transmitter and
the horn will chirp the second time you press
the unlock button.UNLOCK FEEDBACK: OFF:There will be no
feedback when unlocking the vehicle.
Choose one of the available options and press the
customization button while it is displayed on the
DIC to select it and move on to the next feature.
Headlamp Delay
Press the customization button until HEADLAMP
DELAY appears in the display. To select your
preference for how long the headlamps will stay
on when you turn off the vehicle, press the
select button while HEADLAMP DELAY is
displayed on the DIC. Pressing the select button
will scroll through the following choices:
HEADLAMP DELAY: 10 SEC (Seconds)
(default)
HEADLAMP DELAY: 20 SEC
HEADLAMP DELAY: 40 SEC
HEADLAMP DELAY: 1 MIN (Minute)
HEADLAMP DELAY: 2 MIN
HEADLAMP DELAY: 3 MIN
HEADLAMP DELAY: OFF
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The amount of time you choose will be the
amount of time that the headlamps stay on after
you turn off the vehicle. If you choose off, the
headlamps will turn off as soon as you turn off the
vehicle.
Choose one of the available options and press the
customization button while it is displayed on the
DIC to select it and move on to the next feature.
Perimeter Lights
Press the customization button until PERIMETER
LIGHTS appears in the display. To select your
preference for perimeter lighting, press the select
button while PERIMETER LIGHTS is displayed
on the DIC. Pressing the select button will
scroll through the following choices:
PERIMETER LIGHTS: ON (default):The
headlamps and back-up lamps will come on for
40 seconds, if it is dark enough outside, when you
unlock the vehicle with the Remote Keyless
Entry (RKE) transmitter.PERIMETER LIGHTS: OFF:The perimeter lights
will not come on when you unlock the vehicle
with the RKE transmitter.
Choose one of the available options and press the
customization button while it is displayed on the
DIC to select it and move on to the next feature.
Easy Exit Seat
Press the customization button until EASY EXIT
SEAT appears in the display. To select your
preference for seat position exit, press the select
button while EASY EXIT SEAT is displayed
on the DIC. Pressing the select button will scroll
through the following choices:
EASY EXIT SEAT: OFF (default):No seat exit
recall will occur.
EASY EXIT SEAT: ON:The driver’s seat will
move to the exit position when the key is removed
from the ignition.
Choose one of the available options and press the
customization button while it is displayed on the
DIC to select it and move on to the next feature.
For more information on seat position exit,
seeMemory Seat and Mirrors on page 12.
286

Curb View
Press the customization button until CURB VIEW
appears in the display. To select your preference
for curb view, press the select button while CURB
VIEW is displayed on the DIC. Pressing the select
button will scroll through the following choices:
CURB VIEW: OFF (default):Neither outside
mirror will be tilted down when the vehicle
is shifted into REVERSE (R).
CURB VIEW: PASSENGER:The passenger’s
outside mirror will be tilted down when the vehicle
is shifted into REVERSE (R).
CURB VIEW: DRIVER:The driver’s outside
mirror will be tilted down when the vehicle
is shifted into REVERSE (R).
CURB VIEW: BOTH:The driver’s and
passenger’s outside mirror will be tilted down
when the vehicle is shifted into REVERSE (R).
Choose one of the available options and press the
customization button while it is displayed on the
DIC to select it and move on to the next feature.
For more information on tilt mirror in reverse,
seeOutside Curb View Assist Mirrors on
page 187.
Alarm Warning
Press the customization button until ALARM
WARNING appears in the display. To select your
preference for alarm warning, press the select
button while ALARM WARNING is displayed on
the DIC. Pressing the select button will scroll
through the following choices:
ALARM WARNING: BOTH (default):The
headlamps will ash and the horn will chirp when
the alarm is active.
ALARM WARNING: OFF:There will be no alarm
warning on activation.
ALARM WARNING: HORN:The horn will chirp
when the alarm is active.
ALARM WARNING: LAMPS:The headlamps will
ash when the alarm is active.
Choose one of the available options and press the
customization button while your choice is displayed
on the DIC to select it and move on to the next
feature. For more information on alarm warning
type, seeContent Theft-Deterrent on page 131.
287

Driving Uphill
Once you decide you can safely drive up the hill,
you need to take some special steps.
Use a low gear and get a rm grip on the
steering wheel.
Get a smooth start up the hill and try to
maintain your speed. Do not use more power
than you need, because you do not want
your wheels to start spinning or sliding.
Try to drive straight up the hill if at all possible.
If the path twists and turns, you might want to
nd another route.
{CAUTION:
Turning or driving across steep hills can
be dangerous. You could lose traction,
slide sideways, and possibly roll over.
You could be seriously injured or killed.
When driving up hills, always try to go
straight up.
Ease up on your speed as you approach the
top of the hill.
Attach a ag to the vehicle to make you more
visible to approaching traffic on trails or hills.
Sound the horn as you approach the top of the
hill to let opposing traffic know you are there.
Use your headlamps even during the day.
They make you more visible to oncoming traffic.
{CAUTION:
Driving to the top (crest) of a hill at full
speed can cause an accident. There could
be a drop-off, embankment, cliff, or even
another vehicle. You could be seriously
injured or killed. As you near the top of a
hill, slow down and stay alert.
382

After Off-Road Driving
Remove any brush or debris that has collected
on the underbody, chassis, or under the hood.
These accumulations can be a re hazard.
After operation in mud or sand, have the brake
linings cleaned and checked. These substances
can cause glazing and uneven braking. Check the
body structure, steering, suspension, wheels,
tires, and exhaust system for damage. Also, check
the fuel lines and cooling system for any leakage.
Your vehicle will require more frequent service
due to off-road use. Refer to the Maintenance
Schedule for additional information.
Driving at Night
Night driving is more dangerous than day driving.
One reason is that some drivers are likely to
be impaired — by alcohol or drugs, with night
vision problems, or by fatigue.
Here are some tips on night driving.
Drive defensively.
Do not drink and drive.
Adjust the inside rearview mirror to reduce the
glare from headlamps behind you.
Since you cannot 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 vehicle’s headlamps can light up only so
much road ahead.
In remote areas, watch for animals.
If you are 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 are driving, do not
wear sunglasses at night. They may cut down on
glare from headlamps, but they also make a
lot of things invisible.
391