2009 GMC YUKON HYBRID fuel

Introduction
Your hybrid SUV is designed to be more fuel efficient
than the standard SUV, which results in reduced carbon
dioxide emissions.
Using this Supplement
This supplement contains information specific to the
hybrid components of the vehicle. It does not explain
everything you need to know about the vehicle.
Read this supplement along with the owner manual to
learn about the vehicle’s features and controls.
Index
A good place to look for what you need is the Index in
back of this supplement. It is an alphabetical list of
what is in the supplement, and the page number where
you will find it.
iii

Auto Start
The vehicle also has an Auto Start feature. The engine
will remain off while in Auto Stop mode until vehicle
conditions require the engine to run. The near-instant
starting of the engine from Auto Stop mode is called
Auto Start. Some of the vehicle conditions that
may cause the engine to Auto Start are:
•The hood is opened.
•The gear selector is in M (Manual Mode) or
R (Reverse).
•The hybrid battery state of charge is too low.
•The hybrid battery voltage, temperature or power
limits are exceeded.
•The engine is not at operating temperature.
•Acceleration demands require the use of the engine.
EV Mode
The vehicle also has an EV mode which uses only the
electric motor to move the vehicle. Depending on
the state of battery charge, the vehicle can travel up to
two miles (3.2 km) in EV mode. EV mode is unavailable
when the vehicle is out of fuel.
With light acceleration, the vehicle will drive in EV mode.
If increased acceleration is required, or the vehicle
reaches approximately 25 mph (40 km/h), the engine
will start automatically. The engine shuts off at speeds
below 25 mph (40 km/h) unless the transmission is
in M (Manual Mode) or Auto Stop is disabled.
During heavy acceleration, both the engine and hybrid
electric motors supply power. A sensation similar to
a transmission gear change can be felt as the
transmission changes modes. Engine RPM may remain
above 4,000 RPM for a longer period during hard
acceleration.
2-5

D (Drive):This position is for normal driving. It provides
the best fuel economy. If you need more power for
passing, and you are:
•Going less than about 35 mph (55 km/h), push the
accelerator pedal about halfway down.
•Going about 35 mph (55 km/h) or more, push the
accelerator all the way down.
D (Drive) or M (Manual Mode) can be used when towing
a trailer, carrying a heavy load, driving on steep hills,
or for off-road driving. You may want to shift the
transmission to a lower gear selection if the transmission
shifts too often.
Downshifting the transmission in slippery road conditions
could result in skidding. See “Skidding” under “Loss of
Control” in the Index of the vehicle’s owner manual
for more information.
When temperatures are very cold, the transmission’s
gear shifting may be delayed, providing more stable
shifts until the engine warms up. Shifts may be more
noticeable with a cold transmission. This difference
in shifting is normal.M (Manual Mode):This position lets drivers select
the range of gears appropriate for current driving
conditions. If the vehicle has this feature, see “Range
Selection Mode” later in this section.
Notice:Spinning the tires or holding the vehicle
in one place on a hill using only the accelerator
pedal may damage the transmission. The repair will
not be covered by the vehicle warranty. If you are
stuck, do not spin the tires. When stopping on a hill,
use the brakes to hold the vehicle in place.
The vehicle has a shift stabilization feature that
adjusts the transmission shifting to the current driving
conditions to reduce rapid upshifts and downshifts.
If the shift stabilization feature determines that a current
vehicle speed cannot be maintained, the transmission
does not upshift. In some cases, this may appear to be a
delayed shift, however the transmission is operating
normally.
2-8

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

Warning Lights, Gages, and Indicators
Instrument Panel Cluster
The instrument cluster is designed to show at a glance how the vehicle is running. It indicates how fast the vehicle is
going, about how much fuel is left, and many other things needed to drive safely and economically.United States version shown, Canada similar
3-3

Fuel Economy Gage
This gage shows when the vehicle is operating at a
fuel efficient point.By modifying driving behavior to increase the
economy time during driving, fuel mileage will be
improved. When driving in a way that increases the
fuel economy, the indicator moves into the high
efficiency band. When driving in a way that decreases
fuel economy, the indicator moves into the less
efficient band. There are several zones on the gage,
indicating several levels of efficiency when accelerating
or decelerating.
United States
Canada
3-5

Fuel Gage
When the ignition is on, the fuel gage shows
approximately how much fuel is left in the tank.
The gage will first indicate E (empty) before it is out of
fuel, but the vehicle should be refueled as soon as
possible.An arrow on the fuel gage indicates the side of the
vehicle the fuel door is on.
Listed are four situations that may occur with the fuel
gage, none of these indicate a problem:
•At the gas station, the fuel pump shuts off before
the gage reads F (full).
•It takes a little more or less fuel to fill up than the
fuel gage indicated. For example, the gage may
have indicated the tank was half full, but it actually
took a little more or less than half the tank’s
capacity to fill the tank.
•The gage moves a little while turning a corner or
speed up.
•The gage does not go back to E (empty) when the
ignition is turned off. United States
Canada
3-11

Driver Information Center (DIC)
Trip/Fuel Menu Items
Press the trip/fuel button to display the battery voltage.
For more items see “DIC Operation and Displays” in
the owner manual.
BATTERY VOLTAGE
This display shows the current battery voltage. If the
voltage is in the normal range, the value will display.
For example, the display may read BATTERY
VOLTAGE 13.2 VOLTS. If the voltage is low, the
display will show LOW. If the voltage is high, the display
will show HIGH. Your vehicle’s charging system
regulates voltage based on the state of the battery.
The battery voltage may fluctuate when viewing this
information on the DIC. This is normal. See “Charging
System Light” in the owner manual for more information.
If there is a problem with the battery charging system,
the DIC will display a message. SeeDIC Warnings
and Messages on page 3-12.
INST (Instantaneous) ECONOMY
This display normally shows instantaneous fuel
economy. When the vehicle is in Auto Stop mode
AUTO STOP will be displayed. SeeStarting the
Vehicle on page 2-3for more information. The display
may also show if the vehicle is currently in V4 MODE
or V8 MODE. See “Active Fuel Management” in
the owner manual for more information.
DIC Warnings and Messages
Warning messages are displayed on the DIC to notify
the driver that the status of the vehicle has changed and
that some action may be needed by the driver to
correct the condition. If there is more than one message
that needs to be displayed they will appear one after
another. Some messages may not require immediate
action but you should press the select button or the trip
odometer reset stem on the instrument panel cluster
to acknowledge that you received the message
and clear it from the display. Some messages cannot
be cleared from the display because they are more
urgent; these messages require action before they can
be removed from the DIC display. The following are
the possible messages that can be displayed and some
information about them. For information on other DIC
messages, see “DIC Warnings and Messages” in
the owner manual Index.
3-12