2007 GMC YUKON XL Owners Manual

Daytime Running Lamps (DRL)
Daytime Running Lamps (DRL) can make it easier
for others to see the front of your vehicle during
the day. DRL can be helpful in many different
driving conditions, but they can be especially
helpful in the short periods after dawn and before
sunset. Fully functional DRL are required on all
vehicles rst sold in Canada.
The DRL system will come on when the following
conditions are met:
The ignition is on
The exterior lamps control is in AUTO
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 back
lighting will not be on either.
When it begins to get dark, the automatic
headlamp system will switch from DRL to the
headlamps.
When you turn the headlamp switch off, the
headlamps will go off, and your DRL lamps will
illuminate, provided it is not dark outside.
Automatic Headlamp System
When it is dark enough outside, your automatic
headlamp system will turn on the headlamps at the
normal brightness, along with the taillamps,
sidemarker, parking lamps, and the instrument
panel lights. The radio back lighting will also
be dimly lit.
To turn off the automatic headlamp system, turn
the exterior lamps switch to the off position.
Turning off the automatic headlamp system with
the headlamp switch is not available for vehicles
rst sold in Canada.
Your vehicle has a light sensor located on the
top of the instrument panel in the defroster grille
that regulates when the automatic headlamps turn
on. Be sure it is not covered, or the system will
come 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.
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.
201

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
bright enough 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 203.
To idle your vehicle with the automatic headlamp
system off, turn the control to the off position.
You may be able to turn off your Automatic
Headlamp System. SeeDaytime Running Lamps
(DRL) on page 201for more information.
Your headlamps will also stay on after you exit the
vehicle. You can program this feature using the
Driver Information Center (DIC). SeeDIC Vehicle
Customization (With DIC Buttons) on page 264.
As with any vehicle, you should turn on the regular
headlamp system when needed.Fog Lamps
-(Fog Lamps):If your vehicle is equipped with
fog lamps, it is located on the instrument panel to
the left of the steering column. The fog lamps
button is located below the dome lamp override
button.
Your ignition must be in RUN for the fog lamps to
illuminate.
To turn the fog lamps on, press the fog lamps
button. A light will come on in the instrument panel
cluster to let you know that the fog lamps are on.
Press the button again to turn the fog lamps off.
The ignition must be in RUN and the parking
lamps must be on for your fog lamps to work.
The fog lamps will go off while you change
to high-beam headlamps.
Some localities have laws that require the
headlamps to be on along with the fog lamps.
202

Auxiliary Roof Mounted Lamp
If your vehicle has this feature, this button includes
wiring provisions for a dealer or a qualied
service center to install an auxiliary roof lamp.
This button is located
on the overhead
console.
When the wiring is connected to an auxiliary roof
mounted lamp, pressing the button will activate
the lamp and illuminate an indicator light near the
button. Pressing the button again will turn off
the roof mounted lamp.
If your vehicle has this button, your vehicle may
have the snow plow prep package. For further
information seeAdding a Snow Plow or Similar
Equipment on page 396.
Instrument Panel Brightness
D(Instrument Panel Brightness):This feature
controls the brightness of the instrument panel
lights.
The knob for this feature is located next to the
headlamp control.
Turn the knob clockwise or counterclockwise to
adjust the brightness of the instrument panel lights.
Turn the knob clockwise to return the instrument
panel cluster or radio display to full brightness
when the headlamps or parking lamps are on.
To turn on the dome lamps, turn the knob to the
farthest clockwise position.
Dome Lamps
The dome lamps come on when a door is opened.
The dome lamps can also be turned on by
turning the knob, located next to the exterior lamps
control, clockwise to the farthest position. In this
position, the dome lamps will remain on whether a
door is opened or closed.
203

Dome Lamp Override
E(Dome Lamp Override):Press the dome
override button, located next to the exterior lamps
control, to keep the dome lamps off when a
door is open. To set the lamps to the automatic
operation, press the button again so that it is
extended. With the button in this position,
the dome lamps will come on when a door is
opened.
Entry Lighting
Your vehicle has an illuminated entry feature.
When the doors are opened, the dome lamps will
come on if the dome override button is in the
extended position. If the dome override button is
pressed in, the lamps will not come on.
Exit Lighting
With exit lighting, the interior lamps will come on
when you remove the key from the ignition.
They will turn off automatically in 20 seconds.
The lights will not come on if the dome override
button is pressed in.
Reading Lamps
If your vehicle has reading lamps they are located
on the overhead console.
To turn on the reading lamps, press the button
located next to each lamp. To turn them off, press
the button again.
The lamps can be adjusted to point in the direction
you want.
Your vehicle may also have reading lamps in
other locations. To turn the lamps on or off, press
the button located next to the lamp. The lamps
are xed and cannot be adjusted.
Battery Run-Down Protection
This feature shuts off the dome, and reading
lamps if they are left on for more than 10 minutes
when the ignition is off. This will keep the
battery from running down.
204

Ultrasonic Rear Parking
Assist (URPA)
If your vehicle has the Ultrasonic Rear Parking
Assist (URPA) system it is designed to help you
park while in Reverse (R). It operates only at
speeds less than 5 mph (8 km/h). URPA helps
make parking easier and helps you avoid colliding
with objects such as parked vehicles. The URPA
system detects objects that are close to the rear of
the vehicle which are at least 10 inches (25.4 cm)
off the ground and below hood or trunk level.
The system detects objects up to 8 feet (2.5 m)
behind your vehicle. URPA determines how close
these objects are from your bumper within this area.
Ultrasonic sensors on the rear bumper are used to
detect the distance to the object.
{CAUTION:
Even with the Ultrasonic Rear Park Assist
system, the driver must check carefully
before backing up. The system does not
CAUTION: (Continued)
CAUTION: (Continued)
operate above speeds of 5 mph (8 km/h).
The system does not detect objects more
than 8 feet (2.5 meters) behind the vehicle.
This detection distance limit may be
reduced during warm weather or high
humidity. Also, the system does not
detect objects that are below your
bumper, underneath your vehicle, or
some objects very close to the vehicle.
The system is not designed to detect
children, pedestrians, bicyclists, or pets.
So, unless you check carefully behind
your vehicle while you are backing up,
they could be injured or killed.
Whether or not you are using rear park
assist, always check carefully behind your
vehicle before backing up and then watch
closely as you do.
205

The display is located
near the passenger side
rear window and can
be seen by looking over
your right shoulder.
The display has three color-coded lights.
The URPA 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 will
illuminate 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 DIC, PARKING ASSIST OFF will display.
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 also 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.
The system can be disabled using the Driver
Information Center (DIC). SeeDIC Operation and
Displays (With DIC Buttons) on page 244or
DIC Operation and Displays (Without DIC Buttons)
on page 251.
206

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 be on and
ashing.
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 and a
red light will be shown on the rear URPA display
when the shift lever is moved into REVERSE (R).
This occurs under the following conditions:
The driver disables the system. SeeDIC
Operation and Displays (With DIC Buttons)
on page 244orDIC Operation and Displays
(Without DIC Buttons) on page 251.
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.
207

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 532. 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
using the Driver Information Center (DIC), the
PARKING ASSIST ON option will not be
selectable if the necessary conditions stated
above for normal system operation are not met.
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 254.
If the bumper is damaged, your URPA system
may not work properly. Take the vehicle to
your dealer to repair the system.
Accessory Power Outlet(s)
With accessory power outlets you can plug in
auxiliary electrical equipment, such as a cellular
telephone or CB radio.
Your vehicle will have two accessory power
outlets under the climate controls, one on the back
of the oor console and a additional accessory
power outlet in the rear cargo area on the
passenger side.
To use the power outlet, lift the spring cap and
insert electrical 12V device plug. To close
the power outlet, remove 12V electrical device
plug and the spring cap will close.
Certain power accessory plugs may not be
compatible to the accessory power outlet and
could result in blown adapter or vehicle fuses.
208