light CHEVROLET AVALANCHE 2007 2.G Repair Manual

The DRL system will come on when the following
conditions are met:
The ignition is on.
The exterior lamps control is in AUTO.
The transmission is not in PARK (P).
The light sensor determines it is daytime.
When the DRL are on, only your DRL lamps will
be on. The taillamps, sidemarker, and other lamps
will not be on. The instrument panel will not be
lit up either.
When it begins to get dark, the automatic
headlamp system will switch from DRL to the
headlamps.
To turn off the DRL lamps, turn the exterior lamps
control to the OFF position and then release.
For vehicles rst sold in Canada, the transaxle
must be in the PARK (P) position, before the
DRL lamps can be turned off.
As with any vehicle, you should turn on the
regular headlamp system when you need it.
Automatic Headlamp System
When it is dark enough outside and the headlamp
switch is in AUTO, your automatic headlamp
system will turn on your headlamps at the normal
brightness along with other lamps such as the
taillamps, sidemarker, parking lamps, roof marker
lamps, and the instrument panel lights. The
radio lights will also be dim.
To turn off the automatic headlamp system,
turn the exterior lamps switch to the off position
and then release. For vehicles rst sold in Canada,
the transaxle must be in the PARK (P) position,
before the automatic headlamp system can
be turned off.
Your vehicle has a light sensor located on the
top of the instrument panel. Be sure it is not
covered, or the system will be on whenever the
ignition is on.
The system may also turn on your headlamps
when driving through a parking garage, heavy
overcast weather, or a tunnel. This is normal.
217

There is a delay in the transition between
the daytime and nighttime operation of the
Daytime Running Lamps (DRL) and the
automatic headlamp systems so that driving
under bridges or bright overhead street lights
does not affect the system. The DRL and
automatic headlamp system will only be affected
when the light sensor sees a change in lighting
lasting longer than the delay.
If you start your vehicle in a dark garage,
the automatic headlamp system will come
on immediately. Once you leave the garage,
it will take approximately one minute for the
automatic headlamp system to change to DRL
if it is light outside. During that delay, your
instrument panel cluster may not be as bright
as usual. Make sure your instrument panel
brightness control is in the full bright position.
SeeInstrument Panel Brightness on page 219.Fog Lamps
If your vehicle has fog lamps you can use them
for better vision in foggy or misty conditions.
Your parking lamps and/or low-beam headlamps
must be on for your fog lamps to work.
The fog lamp button is located on the left side of
your instrument panel.
-(Fog Lamps):Press the button to turn the
fog lamps on. An indicator light will glow near
the button when the fog lamps are on. Press the
button again to turn them off.
Remember, fog lamps alone will not give off as
much light as your headlamps. Never use your
fog lamps in the dark without turning on the
headlamps.
218

The fog lamps will go off whenever your high-beam
headlamps come on. When the high beams go
off, the fog lamps will come on again.
The fog lamps will be cancelled after the ignition is
turned off. If you still want to use the fog lamps
after you restart the vehicle, you will need to press
the fog lamp button again.
Some localities have laws that require the
headlamps to be on along with the fog lamps.
Exterior Cargo Lamps
You can use the cargo lamp if you need more
light in the cargo area of your vehicle or in
the top-box storage units. Some vehicles will only
have a cargo lamp in the driver side top box.
The cargo lamps come on by turning on the
interior dome lamps.
Instrument Panel Brightness
The knob for this feature is located next to the
exterior lamps control.
D(Instrument Panel Lights):Turn the knob
clockwise or counterclockwise to brighten or
dim the instrument panel lights and the radio
display. This will only work if the headlamps or
parking lamps are on.
To turn on the dome lamps, with the vehicle doors
closed, turn the knob all the way to the right.
219

Dome Lamps
The dome lamps will come on when you open a
door. They will turn off when all doors are closed.
You can also turn the dome lamps on by turning
the knob, located next to the exterior lamp control,
all the way up. In this position, the dome lamps
will remain on whether a door is opened or closed.
Dome Lamp Override
E(Dome Lamp Override):You can use the
dome override button, located next to the exterior
lamps control, to set the dome lamps to come
on automatically when a door is opened, or
to remain off. To turn the lamps off, press the
button. With the button in this position, the dome
lamps will remain off when the doors are open.
To return the lamps to automatic operation,
press the button again so it is extended. With
the button in this position, the dome lamps
will come on when you open a door.
Entry/Exit Lighting
Your vehicle has an illuminated entry/exit feature.
When a door is opened or the key is removed
from the ignition, the dome lamps will come on if
the dome override button is in the out position.
Reading Lamps
If your vehicle has reading lamps, press the button
located next to the lamp to turn it on or off.
Your vehicle may also have reading lamps in other
locations. To turn each one on or off, press the
button located next to the lamp. The lamps cannot
be adjusted.
Electric Power Management
The vehicle has Electric Power Management (EPM)
that estimates the battery’s temperature and state
of charge. It then adjusts the voltage for best
performance and extended life of the battery.
220

When the battery’s state of charge is low, the
voltage is raised slightly to quickly put the charge
back in. When the state of charge is high, the
voltage is lowered slightly to prevent overcharging.
If the vehicle has a voltmeter gage or voltage
display on the Driver Information Center (DIC),
you may see the voltage move up or down.
This is normal. If there is a problem, an alert will
be displayed.
The battery can be discharged at idle if the
electrical loads are very high. This is true for all
vehicles. This is because the generator (alternator)
may not be spinning fast enough at idle to
produce all the power that is needed for very
high electrical loads.
A high electrical load occurs when several of the
following loads are on: headlamps, high beams,
fog lamps, rear window defogger, climate
control fan at high speed, heated seats, engine
cooling fans, trailer loads, and loads plugged
into accessory power outlets.EPM works to prevent excessive discharge of
the battery. It does this by balancing the
generator’s output and the vehicle’s electrical
needs. It can increase engine idle speed to
generate more power, whenever needed.
It can temporarily reduce the power demands
of some accessories.
Normally, these actions occur in steps or levels,
without being noticeable. In rare cases at the
highest levels of corrective action, this action
may be noticeable to the driver. If so, a Driver
Information Center (DIC) message might be
displayed, such as Battery Saver Active or
Service Battery Charging System. If this message
is displayed, it is recommended that the driver
reduce the electrical loads as much as possible.
SeeDIC Warnings and Messages on page 267.
Battery Run-Down Protection
This feature shuts off the dome lamps if they
are left on for more than 10 minutes when
the ignition is in LOCK. This will help prevent
the battery from running down.
221

CAUTION: (Continued)
So if you do not use proper care before
backing up, you could hit a vehicle, child,
pedestrian, bicyclist, or pet, resulting in
vehicle damage, injury, or death. Even
though the vehicle has the URPA system,
always check carefully before backing up
by checking behind your vehicle.
The URPA display is
located above the rear
window towards the
center of the vehicle and
can be seen by looking
over your right shoulder.
The URPA display has three color-coded lights.
The lights are used to provide distance and system
information, along with beeps that will be heard
through the speakers.URPA can be turned off
by pressing the rear park
aid disable button
located next to the radio.
The indicator light will
come on to indicate
that URPA is off.
The red light in the URPA display will also be lit if
the vehicle is in REVERSE (R). If the vehicle has a
Driver Information Center (DIC), PARKING ASSIST
OFF will display on the screen. URPA automatically
turns back on each time the vehicle is started.
How the System Works
When the shift lever is moved into REVERSE (R),
the rear display will briey come on to let you
know the display is operating correctly. URPA
comes on automatically when the shift lever
is moved into REVERSE (R).
The system does not work at a reverse speed
greater than 5 mph (8 km/h). To remind you of this,
the red light on the rear display will ash.
223

How the System Works when Backing
If the shift lever is in REVERSE (R), URPA
detects objects close to the rear bumper. The
rst time an object is detected a single beep will
sound. If an object is detected at a REVERSE (R)
speed between 0 mph (0 km/h) and 5 mph
(8 km/h), the following describes what will occur
based on your distance to a detected object
located behind the vehicle:
At distances between 40 inches (1 m)
and 8 ft (2.5 m), a single amber light will
come on.
At distances between 23 inches (0.6 m)
and 40 inches (1 m), both amber lights
will be on.
At distances between 12 inches (0.3 m)
and 23 inches (0.6 m), all three lights
(amber/amber/red) will be on.
At distances less than 12 inches (0.3 m),
a beeping sound will repeat for a short
time and all three lights (amber/amber/red)
will ash.
When the System Does Not Seem to
Work Properly
If the URPA system will not activate due to a
temporary condition, the message PARKING
ASSIST OFF will be displayed on the DIC screen
and a red light will come on the URPA display
when the shift lever is moved into REVERSE (R).
This occurs under the following conditions:
The driver disables the system.
The parking brake pedal is depressed.
A trailer was attached to your vehicle, or a
bicycle or an object was hanging out of
your trunk during your last drive when you
turned off the vehicle. If the attached objects
are removed from your vehicle before the
start of your next drive, the system will return
to normal operation unless an object is
detected when the vehicle is shifted into
REVERSE (R). If this occurs, URPA assumes
the object is still attached, so you will have
to wait until the vehicle is driven forward
above 15 mph (25 km/h) before URPA will
return to normal operation.
224

The ultrasonic sensors are not kept clean.
So, be sure to keep your vehicle’s rear
bumper free of mud, dirt, snow, ice, and
slush. For cleaning instructions, seeWashing
Your Vehicle on page 541. If the DIC still
displays the PARKING ASSIST OFF
message after cleaning the bumper and
driving forward at a speed of at least
15 mph (25 km/h), see your dealer.
Other conditions that may affect system
performance include vibrations from a
jackhammer or the compression of air brakes
on a very large truck or other mechanical
devices that interfere with URPA performance.
When URPA is disabled without driver
action and the driver attempts to turn
URPA back on by pressing the rear park
aid button, the indicator light will ash
for 3 seconds and then stay lit to indicate
that URPA is off.As always, drivers should use care when
backing up a vehicle. Always look behind you,
being sure to check for other vehicles,
obstructions and blind spots.
For Driver Information Center messages
related to URPA, seeDIC Warnings and
Messages on page 267.
If the vehicle bumper is damaged, the URPA
system may not work properly. Take the
vehicle to your dealer to repair the system.
225

Accessory Power Outlet(s)
Your vehicle may have two accessory power
outlets located on the instrument panel.
Your vehicle may also have an outlet on the back
of the center console above the cupholder door.
Notice:Adding any electrical equipment to
your vehicle may damage it or keep other
components from working as they should. The
repairs would not be covered by your warranty.
Do not use equipment exceeding maximum
amperage rating of 20 amperes. Check with
your dealer before adding electrical equipment.
Certain power accessory plugs may not be
compatible to the accessory power outlets and
could result in blown vehicle or adapter fuses.
If you experience a problem, see your dealer
for additional information on the accessory
power plugs.
Notice:Improper use of the power outlet can
cause damage not covered by your warranty.
Do not hang any type of accessory or accessory
bracket from the plug because the power outlets
are designed for accessory power plugs only.
Ashtray(s) and Cigarette Lighter
If your vehicle has this feature it is located in the
center console or on the instrument panel. Pull up
on the ashtray door to open it if it is in the console or
pull the door open it if it is on the instrument panel.
Notice:If you put papers, pins, or other
ammable items in the ashtray, hot cigarettes
or other smoking materials could ignite them
and possibly damage your vehicle. Never put
ammable items in the ashtray.
To remove the ashtray, pull it out from the console
or from the slide out door. To reinstall the ashtray,
slide it back to the original position.
To use the cigarette lighter, if the vehicle has one,
push it in all the way, and let go. When it is ready
for use, it will pop back out by itself.
Do not use the lighter to plug in accessory devices.
Use the power outlets provided.
Notice:Holding a cigarette lighter in while it is
heating does not let the lighter back away from
the heating element when it is hot. Damage from
overheating can occur to the lighter or heating
element, or a fuse could be blown. Do not hold
a cigarette lighter in while it is heating.
226

The air conditioning compressor will be on unless
the outside temperature is close to freezing.
9(Fan):Turn the left knob clockwise or
counterclockwise to increase or decrease
the fan speed. Turn the knob all the way
counterclockwise to turn the front system off.
:(Outside Air):Press this button to turn
on the outside air mode. When this mode
is selected, air from outside the vehicle will
circulate throughout your vehicle. An indicator
light on the button will come on to let you know
that it is activated. The outside air mode can
be used with all modes, but it cannot be used
with the recirculation mode. Pressing this button
again will cancel the recirculation mode.
?(Recirculation):Press this button to turn
on the recirculation mode. When the button
is pressed, an indicator light will come on.This mode keeps outside air from entering the
vehicle. It can be used to reduce outside air
and prevent odors from entering your vehicle.
Recirculation may also help cool the air inside your
vehicle more quickly once the temperature inside
the vehicle is less than the outside temperature.
The recirculation mode cannot be used with oor,
defrost, or defogging modes. If you try to select
recirculation in one of those modes, the indicator
light will ash three times and turn off. The air
conditioning compressor will also come on when
this mode is activated. While in recirculation mode
the windows may fog when the weather is cold and
damp. To clear the fog, select either the defog or
defrost mode and increase the fan speed.
Recirculation mode can be turned off by pressing
the button again, or turning off the engine.
Temperature Control:Rotate the thumbwheels
up or down to increase or decrease the
temperature on the driver’s side or the passenger
side to the vehicle for the dual zone system.
228