2010 GMC YUKON XL service

Light On Steady:An emission control system
malfunction has been detected on the vehicle.
Diagnosis and service might be required.
An emission system malfunction might be corrected by
doing the following:
.Make sure the fuel cap is fully installed. See Filling
the Tankon page 6‑11. 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.
.If the vehicle has been driven through a deep
puddle of water, the vehicle's electrical system
might be wet. 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 Gasoline Octane on page 6‑7.
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.
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Oil Pressure Gauge
United StatesCanada
The oil pressure gauge shows the engine oil pressure
in psi (pounds per square inch) when the engine
is running. Canadian vehicles indicate pressure in
kPa (kilopascals).
Oil pressure may vary with engine speed, outside
temperature and oil viscosity, but readings above the
low pressure zone indicate the normal operating range.
When the oil pressure reaches the low pressure zone,
the OIL PRESSURE LOW STOP ENGINE message
appears in the Driver Information Center (DIC). See DIC
Warnings and Messages
on page 4‑61and Engine Oilon page 6‑18for more information. A reading in the low pressure zone may be caused
by a dangerously low oil level or some other problem
causing low oil pressure. Check the oil as soon as
possible.
{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 in this manual for changing
engine oil.
If the vehicle is a Two-mode Hybrid, see the Two-mode
Hybrid manual for more information.
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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 in this manual for changing
engine oil. This light comes on briefly while starting the engine.
If it does not, have the vehicle serviced by your dealer.
If the system is working normally the indicator light then
goes off.
If the light comes on and stays on, it means that oil is
not flowing through the engine properly. The vehicle
could be low on oil and it might have some other
system problem.
Security Light
For information regarding
this light and the vehicle's
security system, see
Content Theft-Deterrent
on page 3‑23.
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Low Fuel Warning Light
This light, under the fuel
gauge, comes on briefly
while the engine is being
started.
This light and a chime comes on when the fuel tank is
low on fuel. The Driver Information Center also displays
a “FUEL LEVEL LOW” message. SeeDIC Warnings
and Messages
on page 4‑61for more information.
When fuel is added this light and message should go
off. If it does not, have the vehicle serviced by your
dealer.
Driver Information Center (DIC)
Your vehicle has a Driver Information Center (DIC).
The DIC displays information about your vehicle. It also
displays warning messages if a system problem is
detected.
All messages will appear in the DIC display located
below the tachometer in the instrument panel cluster.
The DIC comes on when the ignition is on. After a short
delay, the DIC will display the information that was last
displayed before the engine was turned off.
If your vehicle has DIC buttons, see “DIC Operation and
Displays (With DIC Buttons)” later in this section and
DIC Vehicle Customization (With DIC Buttons)
on
page 4‑72for the displays available.
If your vehicle does not have DIC buttons, see “DIC
Operation and Displays (Without DIC Buttons)” later in
this section for the displays available.
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Remember, you must reset the OIL LIFE display
yourself after each oil change. It will not reset itself.
Also, be careful not to reset the OIL LIFE display
accidentally at any time other than when the oil has
just been changed. It cannot be reset accurately until
the next oil change. To reset the engine oil life system,
seeEngine Oil Life System on page 6‑20.
Side Blind Zone Alert
If your vehicle has the Side Blind Zone Alert (SBZA)
system, this display allows the system to be turned on
or off. Once in this display, press the set/reset button
to select between ON or OFF. If you choose ON, the
system will be turned on. If you choose OFF, the system
will be turned off. When the SBZA system is turned off,
the DIC will display the SIDE BLIND ZONE ALERT
SYSTEM OFF message as a reminder that the system
has been turned off. See DIC Warnings and Messages
on page 4‑61andSide Blind Zone Alert (SBZA)on
page 3‑60for more information.
Units
Press the vehicle information button until UNITS
displays. This display allows you to select between
English or Metric units of measurement. Once in
this display, press the set/reset button to select
between ENGLISH or METRIC units. All of the
vehicle information will then be displayed in the
unit of measurement selected.
Tire Pressure
On vehicles with the Tire Pressure Monitor System
(TPMS), the pressure for each tire can be viewed in
the DIC. The tire pressure will be shown in either
pounds per square inch (psi) or kilopascals (kPa).
Press the vehicle information button until the DIC
displays FRONT TIRES PSI (kPa) LEFT ## RIGHT ##.
Press the vehicle information button again until the DIC
displays REAR TIRES PSI (kPa) LEFT ## RIGHT ##.
If a low tire pressure condition is detected by the
system while driving, a message advising you to add
pressure in a specific tire will appear in the display.
See Inflation - Tire Pressure
on page 6‑72andDIC
Warnings and Messageson page 4‑61for more
information.
If the tire pressure display shows dashes instead of a
value, there may be a problem with your vehicle. If this
consistently occurs, see your dealer for service.
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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.
As soon as it is safe to do so, carefully pull your
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 your
vehicle or the trailer needs service. See your dealer.
See “Integrated Trailer Brake Control System” under
Towing a Trailer
on page 5‑49for more information.
DRIVER DOOR OPEN
This message displays and a chime sounds if the driver
door is not fully closed and the vehicle is shifted out of
P (Park). Stop and turn off the vehicle, check the door
for obstructions, and close the door again. Check to see
if the message still appears on the DIC.
ENGINE HOT A/C (Air Conditioning)
TURNED OFF
This message displays when the engine coolant
becomes hotter than the normal operating temperature.
See Engine Coolant Temperature Gauge
on
page 4‑38. To avoid added strain on a hot engine,
the air conditioning compressor automatically turns off.
When the coolant temperature returns to normal, the
air conditioning compressor turns back on. You can
continue to drive your vehicle.
If this message continues to appear, have the system
repaired by your dealer as soon as possible to avoid
damage to the engine.
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 4‑38.
4-62

ENGINE OVERHEATED IDLE ENGINE
Notice:If you drive your vehicle while the engine is
overheating, severe engine damage may occur. If an
overheat warning appears on the instrument panel
cluster and/or DIC, stop the vehicle as soon as
possible. See Engine Overheating
on page 6‑36for
more information.
This message displays when the engine coolant
temperature is too hot. Stop and allow the vehicle
to idle until it cools down. See Engine Coolant
Temperature Gauge on page 4‑38.
See Overheated Engine Protection Operating Mode
on
page 6‑39for information on driving to a safe place in
an emergency.
ENGINE OVERHEATED STOP ENGINE
Notice: If you drive your vehicle while the engine is
overheating, severe engine damage may occur. If an
overheat warning appears on the instrument panel
cluster and/or DIC, stop the vehicle as soon as
possible. See Engine Overheating
on page 6‑36for
more information.
This message displays and a chime sounds if the
engine cooling system reaches unsafe temperatures for
operation. Stop and turn off the vehicle as soon as it is
safe to do so to avoid severe damage. This message
clears when the engine has cooled to a safe operating
temperature.
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 6‑36for further
information.
This message also displays when the vehicle's 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.
FUEL LEVEL LOW
This message displays and a chime sounds if the fuel
level is low. Refuel as soon as possible. See Fuel
Gauge
on page 4‑46and Fuelon page 6‑6for
more information.
HOOD OPEN
This message displays and a chime sounds if the hood
is not fully closed. Stop and turn off the vehicle, check
the hood for obstructions, and close the hood again.
Check to see if the message still appears on the DIC.
4-63

ICE POSSIBLE DRIVE WITH CARE
This message displays when ice conditions are
possible.
LEFT REAR DOOR OPEN
This message displays and a chime sounds if the driver
side rear door is not fully closed and the vehicle is
shifted out of P (Park). Stop and turn off the vehicle,
check the door for obstructions, and close the door
again. Check to see if the message still appears on
the DIC.
OIL PRESSURE LOW STOP ENGINE
Notice:If you drive your 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 6‑18for 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 your vehicle serviced by your dealer. See Engine
Oil on page 6‑18.
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 Rear Parking Assist (URPA)
on
page 3‑58for 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 Rear Parking
Assist (URPA) on page 3‑58.
PASSENGER DOOR OPEN
This message displays and a chime sounds if the front
passenger door is not fully closed and the vehicle is
shifted out of P (Park). Stop and turn off the vehicle,
check the door for obstructions, and close the door
again. Check to see if the message still appears on
the DIC.
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