engine GMC YUKON HYBRID 2010 Owner's Manual

Regenerative Braking
Regenerative braking is a hybrid technology that
enables the electric drive motor to operate as a
generator when coasting or braking. Energy from the
moving vehicle recharges the hybrid battery.
The hydraulic disc brakes work with the regenerative
braking to insure effective braking, such as when a high
braking demand is requested.
The braking system is computer controlled and blends
the regenerative braking with the conventional hydraulic
disc brakes to meet any requirements for deceleration.
The controller interprets the braking request and uses
regenerative braking, conventional hydraulic braking or
a combination of both as necessary. Because the
controller applies the hydraulic brakes through its high
pressure accumulator, you may occasionally hear the
motor driven pump when it recharges the system.
This is normal.
In the event of a controller problem, the brake pedal
may be harder to push and the stopping distance may
be longer.
Running the Vehicle While Parked
It is better not to park with the engine running. But if you
ever have to, here are some things to know.
{WARNING:
Exiting the vehicle, without first shifting into
P (Park), may cause the vehicle to move, and you
or others can be seriously injured. Because the
vehicle has the Automatic Engine Start/Stop
feature, the vehicle’s engine might seem to be
shut off when you come to a complete stop.
However, once the brake pedal is released,
the vehicle can move. The vehicle’s engine can
also restart at any time.
Shift to P (Park) and turn the ignition to
LOCK/OFF, before exiting the vehicle.
Follow the proper steps to be sure the vehicle will not
move. See “Shifting Into Park” in the owner manual for
more information.
If pulling a trailer, see Towing a Trailer
on page 5‑8for
more information.
3-18

Section 4 Instrument Panel
Climate Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Warning Lights, Gages, and Indicators . . . . . . . . . . .4-3
Instrument Panel Cluster . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Charging System Light . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Fuel Economy Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Brake System Warning Light . . . . . . . . . . . . . . . . . . . . 4-6
Antilock Brake System (ABS) Warning Light . . . . 4-7
StabiliTrak
®Indicator Light . . . . . . . . . . . . . . . . . . . . . . 4-7 Engine Coolant Temperature Gage . . . . . . . . . . . . . 4-8
Oil Pressure Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Oil Pressure Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Fuel Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . .4-12
DIC Warnings and Messages . . . . . . . . . . . . . . . . . . 4-12
Audio System(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Navigation/Radio System . . . . . . . . . . . . . . . . . . . . . . 4-14
4-1

Climate Controls
For more information on the vehicle's climate control
system, see“Climate Control System” in the owner
manual.
Electric Air Conditioning Compressor
This hybrid vehicle has a electrically powered air
conditioning compressor. This allows for continuous
air conditioning operation and passenger comfort,
even while the hybrid engine cycles on and off.
When operating the climate control system, select the
AUTO mode and the desired temperature setting.
The climate control system automatically adjusts the fan
speed and airflow direction. The climate control system
continues to adjust the climate control settings chosen
for best use of electrical power. At mild temperatures, select a warmer air conditioner
temperature or turn the air conditioner off to get
maximum fuel economy. Continuous air conditioner use
can cause the vehicle to Auto Start more frequently.
During hot weather, driving with the windows closed and
the air conditioner set to Auto mode, will result in better
Hybrid system performance.
Some noise may be heard occasionally from the
compressor, especially when air conditioning use is
high and the engine has turned off.
4-2

Tachometer
United States Version
shown, Canada similar
When the gas engine is off and the key is in the
ON/RUN position, the position of the tachometer
indicator shows the state of the vehicle:
.AUTO STOP position indicates that the vehicle is
still able to move and the engine could restart, by
an Auto Start, at any time.
.OFF position indicates that the vehicle is off.
When the engine is on, the tachometer indicator shows
the engine's revolutions per minute (rpm).
Charging System Light
This 12 V battery light
comes on briefly when
the ignition is turned to
ON/RUN, but the engine
is not running, as a check
to show it is working.
It should go out once the engine has been started. If it
stays on, or comes on while driving, there could be a
problem with the 12 V charging system. Have the
vehicle serviced by your dealer/retailer. A 12 V charging
system Driver Information Center (DIC) message may
also appear. See DIC Warnings and Messages
on
page 4‑12for more information. This light could
indicate that there are electrical problems. Have it
checked right away. If a short distance must be driven
with the light on, be certain to turn off all the
accessories.
4-4

Antilock Brake System (ABS)
Warning Light
For vehicles with the
Antilock Brake System
(ABS), this light comes on
briefly when the engine is
in ON/RUN.
That is normal. If the light does not come on then, have
it fixed so it will be ready to warn if there is a problem.
If the ABS light stays on, turn the ignition off, if the light
comes on while driving, stop as soon as it is safely
possible and turn the ignition off. Then start the engine
again to reset the system. If the ABS light still stays on,
or comes on again while driving, the vehicle needs
service. If the regular brake system warning light is not
on, the vehicle still has brakes, but not antilock brakes.
If the regular brake system warning light is also on, the
vehicle does not have antilock brakes and there is a
problem with the regular brakes. See Brake System
Warning Light on page 4‑6.
For vehicles with a Driver Information Center (DIC),
see DIC Warnings and Messages
on page 4‑12for all
brake related DIC messages.
StabiliTrak®Indicator Light
For vehicles with
StabiliTrak, this warning
light comes on briefly
when the ignition is in
ON/RUN.
If it does not, have the vehicle serviced by your
dealer/retailer. If the system is working normally the
indicator light goes off.
If the light comes on and stays on while driving, there
could be a problem with the StabiliTrak system and the
vehicle might need service. When this warning light is
on, the StabiliTrak system is off and does not limit
wheel spin.
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.
See the owner manual for more information.
4-7

Engine Coolant Temperature Gage
United StatesCanada
This gage shows the engine coolant temperature.
It also provides an indicator of how hard the vehicle is
working. During a majority of the operation, the gage
reads 210° F (100° C) or less. If a load is being pulled
or going up hills, it is normal for the temperature to
fluctuate and go over the 235° F (113° C) mark.
However, if the gage reaches the 260° F (125° C) mark,
it indicates that the cooling system is working beyond its
capacity.
Oil Pressure Gage
United StatesCanada
The oil pressure gage 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 should be 29 to 80 psi (200 to 550 kPa).
In certain situations, such as long extended idles on
hot days, it could read as low as 15 psi (105 kPa) and
still be considered normal.
4-8

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.
AUTO STOP
When the engine goes into Automatic Engine Stop,
the oil pressure gage drops to zero when the
tachometer is at the AUTO STOP position. This is
normal and oil pressure returns to the normal operating
range once the engine starts.
See Starting the Vehicle
on page 3‑3for more
information.
AUTO STOP displays in the Driver Information
Center (DIC) when the vehicle speed is zero.
See DIC Warnings and Messages
on page 4‑12for more information.
4-9

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 as a check it
works, when the ignition
is in ON/RUN. If it does
not, have the vehicle
serviced.
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 might have some other system
problem.
During an AUTO STOP there is zero oil pressure, but
this light will not come on.
4-10

hood is closed, you should have the hood switch
serviced. Failure to service the hood switch properly
can result in an Auto Start condition.
Auto Stops will be disabled when this message is
displayed. If the vehicle is in auto stop mode when this
message appears, the engine will instantly start.
OIL PRESSURE LOW STOP ENGINE
If engine oil pressure is low, this message will be
displayed on the DIC. 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 your oil
level as soon as possible and have your vehicle
serviced. See“Engine Oil”in the owner manual Index.
SERVICE 4 WHEEL DRIVE
This message may display 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/retailer.
SERVICE BATTERY CHARGING
SYSTEM
If the 12V battery system faults or fails this message will
appear on the DIC. The battery/charging system light
will appear in the instrument panel cluster. See “Battery
Warning Light” in the owner manual Index. Driving with
this message on could drain the battery. Have the
electrical system checked as soon as possible.
SERVICE BRAKE SYSTEM
This message will be displayed if there is a problem
with the brake system. You will still be able to brake, but
it will be noticeably more difficult. Pull off the road to a
safe location and have your vehicle towed to the
nearest dealer/retailer for service. See “Brakes,”
“Brake System Warning Light,” and“ABS Brake System
Warning Light” in the owner manual Index.
SERVICE HYBRID SYSTEM
If this message is displayed on the DIC, the vehicle may
continue to operate, but you need to have it serviced as
soon as possible.
SERVICE POWER STEERING
This message displays if a problem has been detected
with the electric power steering. Have your vehicle
serviced by your dealer/retailer immediately.
4-13

Audio System(s)
Navigation/Radio System
For vehicles with a navigation radio system, see the
Navigation System manual for more information.
To view the hybrid screen, press the MENU button on
the radio. The hybrid screen displays when entering the
Configuration Menu.The display shows:
.Auto Stop
.Battery Charging
.Engine Idle
.2‐Wheel and 4‐Wheel Drive Modes for:
‐
Engine Power
‐ Battery Power
‐ Hybrid Power
4-14