check engine GMC YUKON 2011 User Guide

Black plate (22,1)GMC Yukon/Yukon XL Owner Manual - 2011
5-22 Instruments and Controls
To prevent more serious damage to
the vehicle:
.Reduce vehicle speed.
.Avoid hard accelerations.
.Avoid steep uphill grades.
.If towing a trailer, reduce the
amount of cargo being hauled
as soon as it is possible.
If the light continues to flash,
when it is safe to do so, stop the
vehicle. Find a safe place to park
the vehicle. Turn the vehicle off,
wait at least 10 seconds, and
restart the engine. If the light is still
flashing, follow the previous steps
and see your dealer for service as
soon as possible.
Light On Steady: An emission
control system malfunction has
been detected on the vehicle.
Diagnosis and service might be
required. The following may correct an
emissions system malfunction:
.Make sure the fuel cap is
fully installed. See
Filling the
Tank on page 9‑72. The
diagnostic system can determine
if the fuel cap has been left off or
improperly installed. A loose or
missing fuel cap allows fuel to
evaporate into the atmosphere.
A few driving trips with the cap
properly installed should turn the
light off.
.Make sure the electrical system
is not wet. The system could
be wet if the vehicle was driven
through a deep puddle of
water. The condition is usually
corrected when the electrical
system dries out. A few driving
trips should turn the light off.
.Make sure to fuel the vehicle
with quality fuel. Poor fuel quality
causes the engine not to run as
efficiently as designed and can
cause: stalling after start-up,
stalling when the vehicle is
changed into gear, misfiring,
hesitation on acceleration,
or stumbling on acceleration.
These conditions might go away
once the engine is warmed up.
If one or more of these
conditions occurs, change
the fuel brand used. It will
require at least one full tank
of the proper fuel to turn the
light off.
See Recommended Fuel on
page 9‑68.
If none of the above have made
the light turn off, your dealer can
check the vehicle. The dealer
has the proper test equipment
and diagnostic tools to fix any
mechanical or electrical problems
that might have developed.

Black plate (26,1)GMC Yukon/Yukon XL Owner Manual - 2011
5-26 Instruments and Controls
The light flashes if the system is
active and is working to assist the
driver with directional control of the
vehicle in difficult driving conditions.
SeeStabiliTrak
®System on
page 9‑52 for more information.
If the vehicle is a hybrid, see the
hybrid supplement for more
information.
Tire Pressure Light
For vehicles with the Tire Pressure
Monitor System (TPMS), this light
comes on briefly when the engine
is started. It provides information
about tire pressures and the TPMS. When the Light is On Steady
This indicates that one or more
of the tires are significantly
underinflated.
A tire pressure message can
accompany the light. See
Tire
Messages on page 5‑45 for more
information. Stop as soon as
possible, and inflate the tires to the
pressure value shown on the Tire
and Loading Information label. See
Tire Pressure on page 10‑56 for
more information.
When the Light Flashes First and
Then is On Steady
This indicates that there may be a
problem with the TPMS. The light
flashes for about a minute and
stays on steady for the remainder
of the ignition cycle. This sequence
repeats with every ignition cycle.
See Tire Pressure Monitor
Operation on page 10‑59 for more
information.
Engine Oil Pressure Light
{WARNING
Do not keep driving if the oil
pressure is low. The engine can
become so hot that it catches fire.
Someone could be burned. Check
the oil as soon as possible and
have the vehicle serviced.
Notice: Lack of proper engine
oil maintenance can damage the
engine. The repairs would not be
covered by the vehicle warranty.
Always follow the maintenance
schedule for changing engine oil.

Black plate (41,1)GMC Yukon/Yukon XL Owner Manual - 2011
Instruments and Controls 5-41
Engine Oil Messages
CHANGE ENGINE OIL SOON
This message displays when the
engine oil needs to be changed.
When you change the engine oil, be
sure to reset the CHANGE ENGINE
OIL SOON message. SeeEngine
Oil Life System on page 10‑10 for
information on how to reset the
message. See Engine Oil on
page 10‑7 andScheduled
Maintenance on page 11‑2 for
more information.
ENGINE OIL HOT IDLE
ENGINE
This message displays when the
engine oil becomes hotter than the
normal operating temperature. Stop
and allow the vehicle to idle until it
cools down. See Engine Coolant
Temperature Gauge on page 5‑16.
OIL PRESSURE LOW STOP
ENGINE
Notice: If you drive the vehicle
while the engine oil pressure is
low, severe engine damage may
occur. If a low oil pressure
warning appears on the Driver
Information Center (DIC), stop the
vehicle as soon as possible. Do
not drive the vehicle until the
cause of the low oil pressure is
corrected. See Engine Oil on
page 10‑7 for more information.
This message displays if low oil
pressure levels occur. Stop the
vehicle as soon as safely possible
and do not operate it until the cause
of the low oil pressure has been
corrected. Check the oil as soon
as possible and have the vehicle
serviced by your dealer. See Engine
Oil on page 10‑7.
Engine Power Messages
ENGINE POWER IS REDUCED
This message displays and a chime
sounds when the cooling system
temperature gets too hot and the
engine further enters the engine
coolant protection mode. See
Engine Overheating on page 10‑21
for further information.
This message also displays when
the engine power is reduced.
Reduced engine power can affect
the vehicle's ability to accelerate.
If this message is on, but there
is no reduction in performance,
proceed to your destination. The
performance may be reduced the
next time the vehicle is driven. The
vehicle may be driven at a reduced
speed while this message is on,
but acceleration and speed may be
reduced. Anytime this message
stays on, the vehicle should be
taken to your dealer for service as
soon as possible.

Black plate (42,1)GMC Yukon/Yukon XL Owner Manual - 2011
5-42 Instruments and Controls
Fuel System Messages
FUEL LEVEL LOW
This message displays and a chime
sounds if the fuel level is low. Refuel
as soon as possible. SeeFuel
Gauge on page 5‑14 andFuel on
page 9‑68 for more information.
TIGHTEN GAS CAP
This message may display along
with the check engine light on the
instrument panel cluster if the fuel
cap is not tightened properly. See
Malfunction Indicator Lamp on
page 5‑21. Reinstall the fuel cap
fully. SeeFilling the Tank on
page 9‑72. The diagnostic system
can determine if the fuel cap has
been left off or improperly installed.
A loose or missing fuel cap
allows fuel to evaporate into the
atmosphere. A few driving trips with
the cap properly installed should
turn this light and message off.
Key and Lock Messages
REPLACE BATTERY IN
REMOTE KEY
This message displays if a Remote
Keyless Entry (RKE) transmitter
battery is low. The battery needs
to be replaced in the transmitter.
See “Battery Replacement” under
Remote Keyless Entry (RKE)
System Operation on page 2‑3.
Lamp Messages
TURN SIGNAL ON
This message displays and a chime
sounds if a turn signal is left on for
1.2 km (0.75 mile). Move the turn
signal/multifunction lever to the off
position.
Object Detection System
Messages
PARK ASST BLOCKED SEE
OWNERS MANUAL
If your vehicle has the Ultrasonic
Rear Parking Assist (URPA) system,
this message displays if there is
something interfering with the park
assist system. See Ultrasonic
Parking Assist on page 9‑58 for
more information.
PARK ASSIST OFF
If your vehicle has the Ultrasonic
Rear Parking Assist (URPA) system,
after the vehicle has been started,
this message displays to remind the
driver that the URPA system has
been turned off. Press the set/reset
button or the trip odometer reset
stem to acknowledge this message
and clear it from the DIC display.
To turn the URPA system back on,
see Ultrasonic Parking Assist on
page 9‑58.

Black plate (44,1)GMC Yukon/Yukon XL Owner Manual - 2011
5-44 Instruments and Controls
SERVICE SUSPENSION
SYSTEM
If your vehicle has the Autoride®
suspension system, this message
displays when the Autoride
suspension system is not operating
properly. Have your vehicle serviced
by your dealer.
SERVICE TRACTION
CONTROL
If your vehicle has StabiliTrak, this
message displays when there is a
problem with the Traction Control
System (TCS). When this message
displays, the system will not limit
wheel spin. Adjust your driving
accordingly. See your dealer for
service. SeeStabiliTrak
®System on
page 9‑52 for more information.
STABILITRAK OFF
If your vehicle has StabiliTrak, this
message displays when you turn
off StabiliTrak, or when the stability
control has been automatically
disabled. To limit wheel spin and realize the full benefits of the
stability enhancement system, you
should normally leave StabiliTrak
on. However, you should turn
StabiliTrak off if your vehicle gets
stuck in sand, mud, ice, or snow
and you want to rock your vehicle
to attempt to free it, or if you
are driving in extreme off-road
conditions and require more wheel
spin. See
If the Vehicle is Stuck on
page 9‑22. To turn the StabiliTrak
system on or off, see StabiliTrak
®
System on page 9‑52.
There are several conditions that
can cause this message to appear.
.One condition is overheating,
which could occur if StabiliTrak
activates continuously for an
extended period of time.
.The message also displays if
the brake system warning light is
on. SeeBrake System Warning
Light on page 5‑23.
.The message could display if the
stability system takes longer
than usual to complete its
diagnostic checks due to driving
conditions.
.The message displays if an
engine or vehicle related
problem has been detected
and the vehicle needs service.
See your dealer.
.The message also displays
if the vehicle is shifted into
4LO (Two Speed Transfer
Case Only).
The message turns off as soon
as the conditions that caused the
message to be displayed are no
longer present.
TRACTION CONTROL OFF
If your vehicle has StabiliTrak, this
message displays when the Traction
Control System (TCS) is turned off.
Adjust your driving accordingly. See
StabiliTrak
®System on page 9‑52
for more information.

Black plate (45,1)GMC Yukon/Yukon XL Owner Manual - 2011
Instruments and Controls 5-45
Airbag System Messages
SERVICE AIR BAG
This message displays if there is a
problem with the airbag system.
Have your dealer inspect the
system for problems. SeeAirbag
Readiness Light on page 5‑18 and
Airbag System on page 3‑39 for
more information.
Anti-Theft Alarm System
Messages
SERVICE THEFT DETERRENT
SYSTEM
This message displays when there
is a problem with the theft-deterrent
system. The vehicle may or may not
restart so you may want to take the
vehicle to your dealer before turning
off the engine. See Immobilizer
Operation on page 2‑16 for more
information.
Tire Messages
SERVICE TIRE MONITOR
SYSTEM
On vehicles with the Tire
Pressure Monitor System (TPMS),
this message displays if a part on
the TPMS is not working properly.
The tire pressure light also flashes
and then remains on during the
same ignition cycle. See Tire
Pressure Light on page 5‑26.
Several conditions may cause
this message to appear. See Tire
Pressure Monitor Operation on
page 10‑59 for more information.
If the warning comes on and stays
on, there may be a problem with the
TPMS. See your dealer.
TIRE LEARNING ACTIVE
On vehicles with the Tire Pressure
Monitor System (TPMS), this
message displays when the TPMS
is re-learning the tire positions on
your vehicle. The tire positions must
be re-learned after rotating the tires
or after replacing a tire or sensor. See
Tire Inspection on page 10‑62,
Tire Rotation on page 10‑62, Tire
Pressure Monitor System on
page 10‑58, and Tire Pressure on
page 10‑56 for more information.
TIRE LOW ADD AIR TO TIRE
On vehicles with the Tire Pressure
Monitor System (TPMS), this
message displays when the
pressure in one or more of the
vehicle's tires needs to be checked.
This message also displays LEFT
FRT (left front), RIGHT FRT
(right front), LEFT RR (left rear),
or RIGHT RR (right rear) to
indicate the location of the low
tire. The low tire pressure warning
light will also come on. See Tire
Pressure Light on page 5‑26.
You can receive more than one
tire pressure message at a time.
To read the other messages that
may have been sent at the same
time, press the set/reset button
or the trip odometer reset stem. If a
tire pressure message appears on
the DIC, stop as soon as you can.

Black plate (46,1)GMC Yukon/Yukon XL Owner Manual - 2011
5-46 Instruments and Controls
Have the tire pressures checked
and set to those shown on the Tire
Loading Information label. SeeTires
on page 10‑48, Vehicle Load Limits
on page 9‑23, and Tire Pressure on
page 10‑56. The DIC also shows
the tire pressure values. See “DIC
Operation and Displays (With DIC
Buttons)” earlier in this section.
Transmission Messages
SERVICE 4 WHEEL DRIVE
This message displays if a problem
occurs with the four-wheel-drive
system. If this message appears,
stop as soon as possible and turn
off the vehicle. Make sure the key is
in the LOCK/OFF position for at
least one minute and then restart
the vehicle and check for the
message on the DIC display. If
the message is still displayed or
appears again when you begin
driving, the four-wheel-drive system
needs service. See your dealer.
TRANSMISSION HOT IDLE
ENGINE
Notice:If you drive the vehicle
while the transmission fluid is
overheating and the transmission
temperature warning is displayed
on the instrument panel cluster
and/or DIC, you can damage the
transmission. This could lead to
costly repairs that would not be
covered by the warranty. Do not
drive the vehicle with overheated
transmission fluid or while the
transmission temperature
warning is displayed.
This message displays along with a
sound if the transmission fluid in the
vehicle gets hot. Driving with the
transmission fluid temperature high
can cause damage to the vehicle.
Stop the vehicle and let it idle to
allow the transmission to cool. This
message clears and the chime
stops when the fluid temperature
reaches a safe level.
Vehicle Reminder
Messages
CHECK TRAILER WIRING
On vehicles with the Integrated
Trailer Brake Control (ITBC) system,
this message may display and a
chime may sound when one of the
following conditions exists:
.A trailer with electric brakes
becomes disconnected from the
vehicle.
‐ If the disconnect occurs while
the vehicle is stopped, this
message clears itself after a
short time.
‐ If the disconnect occurs while
the vehicle is moving, this
message stays on until the
ignition is turned off.
.There is a short in the wiring to
the electric trailer brakes.
When this message displays, power
is no longer available to the trailer
brakes.

Black plate (47,1)GMC Yukon/Yukon XL Owner Manual - 2011
Instruments and Controls 5-47
As soon as it is safe to do so,
carefully pull the vehicle over to the
side of the road and turn the ignition
off. Check the wiring connection to
the trailer and turn the ignition back
on. This message clears if the trailer
is reconnected. This message also
clears if you acknowledge it. If this
message still displays, either the
vehicle or the trailer needs service.
See your dealer.
See“Integrated Trailer Brake
Control System” underTowing
Equipment on page 9‑84 for more
information.
ICE POSSIBLE DRIVE
WITH CARE
This message displays when ice
conditions are possible.
TRAILER CONNECTED
On vehicles with the Integrated
Trailer Brake Control (ITBC) system,
this message displays briefly when
a trailer with electric brakes is first
connected to the vehicle. This message clears itself after
several seconds. This message also
clears if you acknowledge it. After
this message clears, the TRAILER
GAIN/OUTPUT display appears in
the DIC.
See
“TRAILER GAIN/OUTPUT”
under Driver Information Center
(DIC) on page 5‑28 and“Integrated
Trailer Brake Control System” under
Towing Equipment on page 9‑84 for
more information.
Washer Fluid Messages
WASHER FLUID LOW ADD
FLUID
This message displays when
the windshield washer fluid is low.
Fill the windshield washer fluid
reservoir as soon as possible.
See Engine Compartment Overview
on page 10‑6 for the location of the
windshield washer fluid reservoir.
Also, see Washer Fluid on
page 10‑25 for more information.
Vehicle
Personalization
Vehicle Personalization
(With DIC Buttons)
Your vehicle may have
customization capabilities that
allow you to program certain
features to one preferred setting.
Customization features can only
be programmed to one setting
on the vehicle and cannot be
programmed to a preferred setting
for two different drivers.
All of the customization options may
not be available on your vehicle.
Only the options available will be
displayed on the 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.
The customization preferences are
automatically recalled.

Black plate (8,1)GMC Yukon/Yukon XL Owner Manual - 2011
9-8 Driving and Operating
Before You Go Off-Roading
.Have all necessary maintenance
and service work done.
.Make sure there is enough fuel,
that fluid levels are where they
should be, and that the spare
tire, if the vehicle has one, is
fully inflated.
.Be sure to read all the
information about
four-wheel-drive vehicles
in this manual.
.Make sure all underbody
shields, if the vehicle has them,
are properly attached.
.Know the local laws that apply
to off-roading where you will
be driving or check with law
enforcement people in the area.
.Be sure to get the necessary
permission if you will be on
private land.If you think you will need some
more ground clearance at the front
of your vehicle, you can remove the
front fascia lower air dam. The air
dam is held in place by two bolts
and 10 snaps accessible from
underneath the front fascia.
To remove the air dam:
1. Remove the two outboard air
dam bolts.
2. With a flat‐blade tool, disengage the snaps.
3. After the bolts are removed and the snaps are disengaged, push
forward on the air dam until it
is free.
Notice: Operating your vehicle
for extended periods without
the front fascia lower air dam
installed can cause improper air
flow to the engine. Always be
sure to replace the front fascia
air dam when you are finished
off-road driving. After off-roading, be sure to reinstall
the air dam:
1. Line up the snaps and push the
air dam rearward to engage the
snaps.
2. Install the two outboard bolts.
Loading Your Vehicle for
Off-Road Driving
{WARNING
.Cargo on the load floor piled
higher than the seatbacks
can be thrown forward during
a sudden stop. You or your
passengers could be injured.
Keep cargo below the top of
the seatbacks.
.Unsecured cargo on the
load floor can be tossed
about when driving over
rough terrain. You or your
passengers can be struck
by flying objects. Secure the
cargo properly. (Continued)

Black plate (17,1)GMC Yukon/Yukon XL Owner Manual - 2011
Driving and Operating 9-17
Driving in Water
{WARNING
Driving through rushing water can
be dangerous. Deep water can
sweep your vehicle downstream
and you and your passengers
could drown. If it is only shallow
water, it can still wash away the
ground from under your tires, and
you could lose traction and roll
the vehicle over. Do not drive
through rushing water.
Heavy rain can mean flash flooding,
and flood waters demand extreme
caution. Find out how deep the water is
before driving through it. Do not try
it if it is deep enough to cover the
wheel hubs, axles, or exhaust
pipe
—you probably will not get
through. Deep water can damage
the axle and other vehicle parts.
If the water is not too deep, drive
slowly through it. At faster speeds,
water splashes on the ignition
system and the vehicle can stall.
Stalling can also occur if you get the
tailpipe under water. If the tailpipe is
under water, you will never be able
to start the engine. When going
through water, remember that when
the brakes get wet, it might take
longer to stop. See Driving on Wet
Roads on page 9‑18.
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 fire 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 and
check the fuel lines and cooling
system for any leakage.
The vehicle requires more frequent
service due to off-road use. Refer
to the Maintenance Schedule for
additional information.