battery GMC YUKON HYBRID 2009 Owners Manual

Manual Reclining Seatbacks
To recline the seatback:
1. Lift the reclining seatback lever (C).
2. Move the seatback to the desired position, then
release the lever to lock the seatback in place.
3. Push and pull on the seatback to make sure it is
locked.
To return the seatback to an upright position:
1. Lift the lever fully without applying pressure to the
seatback and the seatback will return to the upright
position.
2. Release the lever to lock the seatback in place.
3. Push and pull on the seatback to make sure
it is locked.
Restraint System Check
Replacing Restraint System Parts
After a Crash
If an airbag inflates or the vehicle has been in a crash,
the vehicle’s sensing system may command the
automatic hybrid battery disconnect to open. The battery
will disconnect. The hybrid battery will be off and the
vehicle will not start. The airbag readiness light and/or
SERVICE HYBRID SYSTEM message may come
on in the driver information center. See “Airbag
Readiness Light” in the owner manual andDriver
Information Center (DIC) on page 3-12for more
information.
To operate the vehicle, the automatic hybrid battery
disconnect must be reconnected by a qualified service
technician and sensing system parts will need to be
replaced. Have the vehicle serviced right away.
1-3

Auto Stop
The vehicle has an Auto Stop feature. After a successful
engine start, the engine may turn off and operate in the
Auto Stop mode. Some of the vehicle conditions that
allow the engine to stop running and enter the Auto Stop
mode are:
•Ignition switch is in the ON/RUN position.
•The hood is closed.
•The gear selector is in P (Park), N (Neutral) or
D (Drive).
•The hybrid battery is at an acceptable state of
charge.
•The hybrid battery voltage, temperature or power
limits are not exceeded. In very hot conditions,
Auto Stop may be unavailable until the hybrid battery
has cooled.
•The engine is at operating temperature.
If you are on an incline, the hybrid drive motor can help
keep the vehicle from rolling backwards, even if the
engine is in Auto Stop.With your foot off the brake and the vehicle on level
ground, the hybrid drive motor may cause the vehicle
to roll slowly forward, even when the engine is in
Auto Stop.
Keep your foot firmly on the brake pedal until you are
ready for the vehicle to move.
Engine OFF and AUTO STOP modes are indicated on
the tachometer display. When the tachometer needle
indicates OFF, the engine is not running and will remain
off until the ignition key is placed in the START position
or a remote vehicle start is performed. When the
tachometer needle indicates AUTO STOP, the hybrid
system is on, the engine is not running, but may
Auto Start at any time without notice. SeeTachometer
on page 3-4for more information.
A chime will sound if the driver door is opened while
in Auto Stop as a reminder that the ignition switch is
not in the LOCK/OFF position. Always turn the ignition
switch to LOCK/OFF and remove the key from the
ignition switch when exiting the vehicle.
2-4

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

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.
See “Warning Lights, Gages, and Indicators” and “Driver
Information Center (DIC)” in the Index of the owner
manual. 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.
{CAUTION:
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, seeTowing a Trailer on page 4-2for
more information.
2-10

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

SERVICE BATTERY CHARGING
SYSTEM
If the hybrid battery system faults or fails this message
will appear on the DIC. The engine auto stop feature
will be disabled and the battery/charging system light will
appear in the instrument panel cluster. See “Battery
Warning Light” in the owner manual Index.
Driving with this light on could drain your batteries.
Have the electrical system checked as soon as possible.
Pressing the select button or the trip odometer reset
stem on the instrument panel cluster will acknowledge
this message and clear it from the DIC display.
HOOD OPEN
If the hood is not fully closed or there is a problem
with the hood switch, this message will be displayed.
Close the hood to clear the message. If the HOOD
OPEN message continues to be displayed after
verifying the hood is closed, you should have the hood
switch serviced. Pressing the select button or the
trip odometer reset stem on the instrument panel cluster
will acknowledge this message and clear it from the
DIC display.
When this message is displayed, the auto stop
function will not operate. 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 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.
3-13

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
3-14

Your Driving, the Road, and
the Vehicle
Electric Power Steering
This vehicle has On-Demand Electric-Assist Power
Steering instead of conventional full-time hydraulic
power steering. It uses electricity supplied by the same
battery which is re-charged by the regenerative
braking system.
Because the system is On-Demand Electric-Assist,
energy is used only when the steering wheel is turned,
or when the steering gear is used to help isolate the
forces of rough roads. This system does not use power
steering fluid, making it maintenance-free.
Towing
Towing Your Vehicle
Consult your dealer/retailer or a professional towing
service if the disabled vehicle needs to be towed.
Towing a Trailer
For more information, see “Towing a Trailer” in the
owner manual Index.
Weight of the Trailer
How heavy can a trailer safely be?
It depends on how the rig is used. For example, speed,
altitude, road grades, outside temperature and how
much the vehicle is used to pull a trailer are all
important. It can depend on any special equipment on
the vehicle, and the amount of tongue weight the vehicle
can carry.
4-2

Service............................................................5-2
Doing Your Own Service Work.........................5-2
Checking Things Under the Hood.....................5-3
High Voltage Devices and Wiring......................5-3
Engine Compartment Overview.........................5-4
Automatic Transmission Fluid...........................5-5
Drive Motor/Generator Control Module (DMCM)
Coolant Surge Tank Pressure Cap..................5-6
Drive Motor/Generator Control Module (DMCM)
Cooling System...........................................5-6
Power Steering Fluid.....................................5-11
Brakes........................................................5-11
Battery........................................................5-15
Jump Starting...............................................5-16
Bulb Replacement..........................................5-21
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps.........................................5-21
Replacement Bulbs.......................................5-22Electrical System............................................5-22
Fuses and Circuit Breakers............................5-22
Underhood Fuse Block..................................5-22
Tires..............................................................5-24
Inflation - Tire Pressure.................................5-24
Tire Pressure Monitor Operation.....................5-25
Tire Inspection and Rotation...........................5-29
Tire Chains..................................................5-30
If a Tire Goes Flat........................................5-30
Tire Sealant and Compressor Kit
(Without Selector Switch)............................5-32
Tire Sealant and Compressor Kit
(With Selector Switch)................................5-42
Tire Sealant and Compressor Kit Storage.........5-50
Capacities and Specications..........................5-52
Section 5 Service and Appearance Care
5-1

Battery
This vehicle has a standard 12-volt battery and a
high-voltage hybrid battery.
When a new standard 12-volt battery is needed, see
your dealer/retailer for one that has the replacement
number shown on the original battery’s label.
When a new high-voltage hybrid battery is needed,
see your dealer/retailer.
If an airbag inflates or the vehicle has been in a crash,
the vehicle’s sensing system might command the
automatic hybrid battery disconnect to open.
SeeReplacing Restraint System Parts After a Crash
on page 1-3for more information.
Warning:Battery posts, terminals, and related
accessories contain lead and lead compounds,
chemicals known to the State of California to cause
cancer and reproductive harm. Wash hands after
handling.
Vehicle Storage
{CAUTION:
Batteries have acid that can burn you and gas that
can explode. You can be badly hurt if you are not
careful. SeeJump Starting on page 5-16for tips
on working around a battery without getting hurt.
Infrequent Usage: If the vehicle is driven infrequently,
remove the 12-volt battery black, negative (−) cable from
the battery. This helps keep the battery from running
down.
Extended Storage: For extended storage of the vehicle,
remove the 12-volt battery black, negative (−) cable
from the battery or use a battery trickle charger.
This helps maintain the charge of the battery over an
extended period of time.
Remember to reconnect the battery when ready to drive
the vehicle.
5-15